1. Weight Distribution Hitch
  2. Equal-i-zer
  3. 100 lbs
  4. 200 lbs
  5. 300 lbs
  6. WD With Sway Control
Equal-i-zer Weight Distribution System w/ 4-Point Sway Control - 4,000 lbs GTW, 400 lbs TW

Equal-i-zer Weight Distribution System w/ 4-Point Sway Control - 4,000 lbs GTW, 400 lbs TW

Item # EQ37040ET
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Weight Distribution Hitch
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EQ37040ET - Electric Brake Compatible,Surge Brake Compatible Equal-i-zer WD With Sway Control
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Is this right for you? Product Expert Lindsey S says:

Yes, if you:

  • Need to keep your trailer firmly in line so it tracks perfectly behind your vehicle
  • Want an American-made system that lasts from an industry-leading brand
  • Have a lightweight trailer that maxes out at 400 lbs of tongue weight

No, if you:

  • Hate noise - the steel on steel brackets can create a racket, especially during turns
  • Might be upgrading to a heavier trailer and would want to transfer your hitch to it
  • Don't have a big problem with trailer sway - you might just end up with a really rigid ride
Steel-on-steel friction works to prevent and correct trailer sway in this unique weight distribution system. Sway control brackets ensure that your trailer stays in line with your tow vehicle. 2" Hitch ball and adjustable shank included. Lowest Prices for the best weight distribution hitch from Equal-i-zer. Equal-i-zer Weight Distribution System w/ 4-Point Sway Control - 4,000 lbs GTW, 400 lbs TW part number EQ37040ET can be ordered online at etrailer.com or call 800-298-8924 for expert service.
  • All Info
  • Reviews (528)
  • Q & A (66)
  • Photos
  • Why etrailer?

Equal-i-zer Weight Distribution Hitch - EQ37040ET

  • 100 lbs
  • 200 lbs
  • 300 lbs
  • WD With Sway Control
  • Equal-i-zer
  • Fits 2 Inch Hitch
  • Allows Backing Up
  • Prevents Sway
  • Includes Shank
  • 4-Point
  • Electric Brake Compatible
  • Surge Brake Compatible

Steel-on-steel friction works to prevent and correct trailer sway in this unique weight distribution system. Sway control brackets ensure that your trailer stays in line with your tow vehicle. 2" Hitch ball and adjustable shank included.


  • Evenly distributes weight over axles of tow vehicle and trailer for stability and control
    • Creates a level ride for both tow vehicle and trailer
  • Integrated 4-Point Sway Control limits side-to-side movement
    • Brackets keep spring bars in place for a rigid system that holds trailer in line
    • No lift chains - eliminate unwanted movement
    • Steel-on-steel friction helps to minimize sway caused by winds or sudden maneuvers
  • Unique design makes system compatible with surge-type brake actuators
  • Spring bars flex for a controlled, even ride
    • Constructed of chromoly steel for superior dexterity and spring
  • No-drill, clamp-on brackets can be adjusted along the trailer frame
    • Accommodates frame-mounted items such as gas tanks, battery boxes, toolboxes, or generators
  • Desired tilt is achieved with traditional washer design
    • Add or remove washers from spacer rivet to tilt head up or down
  • Dipped steel construction is durable and corrosion resistant
  • Snap-up lever eases installation by reducing lifting required by trailer jack
  • System includes head assembly, adjustable shank, spring bars, sway control brackets, 2" hitch ball, lift handle, pin and clip, and all necessary hardware
    • 1-7/8" Thin walled socket (EQ70-00-4800 - sold separately) recommended for hitch ball installation
  • Made in the USA


  • Maximum tongue weight: 400 lbs
  • Gross towing weight: 4,000 lbs
  • Ball size: 2"
  • Fits: 2" x 2" trailer hitch receivers rated for use with weight distribution systems
  • Sway control bracket positioning: 25" - 32" back from center of coupler
  • Maximum trailer frame height: 6"
  • Shank length:
    • 8" From center of hitch pin hole to center of adjustment holes
    • 9" From center of hitch pin hole to front of shank
    • 7" From center of hitch pin hole to back of shank
    • 12" Overall
  • Total height adjustment along shank: 7-1/2"
    • Maximum rise: 7"
    • Maximum drop: 3"
    • Overall height: 9-1/2"
    • Holes are spaced 1-1/4" apart on center
  • Spring bar dimensions: 36" long x 1" wide
  • Limited lifetime warranty


Included w/ SystemRequired - Sold SeparatelyOptional Add-Ons

90-00-0400 Equal-i-zer Weight Distribution Hitch

  • Weight Distribution Shank
  • Weight Distribution Head
  • 2" Chrome Hitch Ball
  • 2 Sway Control Brackets
  • 2 Spring Bars
  • Snap-up Lever
  • Spacer Rivet and Washers
  • Hitch Pin and Clip
  • Necessary Installation Hardware
  • Thin Walled Socket for Installation of Hitch Ball

Weight Distribution Diagram

Create a more stable ride for your tow vehicle and trailer with a weight distribution hitch. Adding spring bars to your towing system applies leverage, which transfers the load that is pushing down on the rear of your vehicle to all the axles on both your tow vehicle and your trailer, resulting in an even distribution of weight throughout. The result is a smooth, level ride, as well as the ability to tow the maximum capacity of your hitch.

Selecting a Weight Distribution System

The tongue weight rating is the most important factor in determining which size weight distribution system you should use. If the bars of the system you choose are rated too high for your setup, they will create a rigid ride, which can result in a bouncing trailer. If, on the other hand, the bars are not rated high enough, the system will be unable to properly distribute the weight, rendering it virtually useless.

To determine the proper weight rating for a weight distribution system, you must first determine your trailer's tongue weight. Then add to that the weight of the cargo behind the rear axle of your tow vehicle. These two measurements make up the tongue weight rating for a weight distribution system.

Features of the Equal-i-zer

Head Tilt Adjustment

Controlling head tilt with traditional washer method

The Equal-i-zer weight distribution system uses the traditional washer-style adjustment method to achieve the perfect tilt. Controlling the head tilt helps you to fine-tune the leverage on your entire system, making it easier to install and hook up the spring bars. To adjust the tilt, simply slide washers onto the spacer rivet and insert the rivet into the head assembly. To increase the angle, add a washer. To reduce the angle, remove a washer. Most setups take four to six washers to achieve the proper height. Once you get the desired tilt, insert the shank bolts to secure the head to the shank and then tighten it in place.

Construction of Spring Arms

The Equal-i-zer spring bars are not made of traditional spring steel. Rather, they are constructed of a chromium-molybdenum alloy steel. Chromoly steel has a high tensile strength for extreme durability. It also features excellent dexterity, which allows it to give as required and then return softly back to its original form. This pliability is important in minimizing trailer bounce while still ensuring that the weight of your rig is adequately distributed.

Fixed Sway Control Brackets

Installation of Sway-Control Brackets

The unique sway control brackets of the Equal-i-zer are easy to install and simple to use. They clamp onto your trailer frame and conveniently adjust to a position anywhere between 29 inches and 32 inches back from the coupler. These brackets provide the attachment points for the weight distribution spring bars. To position the spring bars during hookup, simply use the included snap-up lever to lift each bar into place on the L-shaped brackets. Then secure the bars in place with the included L-pins and clips.

Equal-i-zer Hitch 4-Point Sway Control

The Equal-i-zer weight distribution system works to stop trailer sway before it begins. This is achieved through the rotational friction that is present in the weight distribution hitch itself. Within the system head, the downward pressure that is placed on the hitch ball by the trailer is combatted by the upward pressure exerted by the spring bars that are mounted in the sockets. This upward force is placed on the spring bars on either side of the system, creating the rotational friction that, essentially, forces your trailer in line. This type of friction is responsible for two points - one on either side of the trailer - of the 4-Point Sway Control. To ensure that enough tension is present, make certain that the socket bolts in the head assembly are torqued to at least 45 foot-pounds.

Points within the Equal-i-zer system where upward and downward forces interact to create rotational friction

The other two points of sway control are created by the steel-on-steel friction that occurs when the spring bars slide within the L-brackets that are mounted on the trailer tongue. Most traditional weight distribution systems have spring bars that are suspended by chains. Although this ensures that the system is not so rigid as to create bounce in the trailer, it also allows a good deal of side-to-side play in the system. Letting the spring bars hang freely minimizes the rotational friction described earlier. It also eliminates your system's ability to create the type of direct friction that has been shown to be so effective in limiting trailer sway.

This direct friction that is applied to the spring bars in the Equal-i-zer system helps to stop sway once it has begun. The concept is similar to the way in which an add-on friction sway control device functions. When each spring bar moves forward or backward, or side to side, it rubs along the bracket, creating friction. The resistance created by this action limits the movement of the spring bar, thus preventing further side-to-side movement of the trailer.

Most add-on units feature some sort of friction material similar to that used in automotive brakes. But the Equal-i-zer uses direct steel-on-steel contact to create resistance. This is the same sort of friction that is used with locomotives that pull loaded railcars weighing tons. No additional materials are needed. The steel will outlast any of those other materials, providing an extremely durable, functional sway control system.

EQ37040ET Equalizer Weight Distribution Hitch with Adjustable Shank and Hitch Ball - 4K

Installation Details EQ37040ET Installation instructions

Customer Reviews

Equal-i-zer Weight Distribution System w/ 4-Point Sway Control - 4,000 lbs GTW, 400 lbs TW - EQ37040ET

Average Customer Rating:  4.8 out of 5 stars   (528 Customer Reviews)

Steel-on-steel friction works to prevent and correct trailer sway in this unique weight distribution system. Sway control brackets ensure that your trailer stays in line with your tow vehicle. 2" Hitch ball and adjustable shank included.

- EQ37040ET

The Equilizer hitch has made towing much, much better for a short, single axle travel trailer. There is zero sway. The only issue we've had is that the brackets mounted to the trailer frame tend to slide or tilt occasionally, so periodic adjustment is needed. The hitch isn't as noisy as I was expecting. Love the easy setup and tear down, too. 691146

- EQ37040ET

Preston took a lot of time researching the right product for my application. He was patient while I got him the measurements. Thanks much. 663438

- EQ37040ET

Love it! Highly recommend it! 642466

Great product, recommended for any towing close to maximum capacity. Excellent sway control
DavidD - 05/17/2020


- EQ37040ET

Great product. Pulled a rockwood A212 with a Nissan Murano made a world of a difference. Good Distribution of the weight. 522671

- EQ37040ET

We’ve only used the hitch once but it’s been easy to use. Service was great! Would definitely buy again. 514787

- EQ37040ET

I ordered a weight distribution system for my camper. I needed rush delivery. The folks on the phone were great and I received the order on time and it worked out great. 461812

- EQ37040ET

Love the equalizer Hitch. Even more so I love this site. Awesome prices and I received my Hitch three days before I thought it would come. 461567

- EQ37040ET

Excellent customer service and follow up thru the the entire process. Found what we needed when no one else could on etrailer 305600

- EQ37140ET

Review from a similar 4-Point Sway Control in Weight Distribution Hitch

This is my second Equal-i-zer setup. I've been very happy with the performance of the WD system. Very easy to use and quiet too. I do recommend the plastic pads that allow the bars to rest on to protect the bars and quiet the system. 908296

- EQ37060ET

Review from a similar 4-Point Sway Control in Weight Distribution Hitch

Installed myself and spent a lot of time adjusting the torsion and test driving. Very pleased with the firmness and stability of the 4000 lb. trailer. There are periods when I hear some squeaking in back, but retightening all the hitch bolts seems to alleviate most of the noise. 643400

- EQ37101ET

Review from a similar 4-Point Sway Control in Weight Distribution Hitch

Thank you for your 10 Star customer service. Cathy T took time and reassured me on my order was the right order for my set up. I tell you what it’s nice to know you both are giving great customer service. I will go out of my means to tell people about your excellent service! Thank you 661491

- EQ37120ET

Review from a similar 4-Point Sway Control in Weight Distribution Hitch

The Equalizer Weight Distribution System w/4 point sway control is as good as advertised. The installation took me approx 2.5 hrs and it was not difficult, just took a little time to make fine tuning adjustments to get the performance from the system that I wanted. The Equalizer System has removed an estimated 95% of the sway issue that I was having while pulling a 29 ft travel trailer with a mid-size Chevrolet Colorado pickup. Looking forward to getting out on the road and giving it a thorough testing, but so far it meets my expectations. 402238

This hitch was a great investment!! It has made a huge difference in how my trailer handles in the Texas winds. I used to get white knuckled every time that I set out on a trip with my previous chain hitch and seldom ever felt comfortable in pulling the trailer at speeds in excess of 45 mile per hour. Now I can move along at normal Dallas freeway speeds in comfort. This hitch was a welcomed addition to my RV experience.
Jim H - 07/06/2018


- EQ37060ET

Review from a similar 4-Point Sway Control in Weight Distribution Hitch

I towed my trailer out West in July. No problems on windy roads thanks to your product! 725803

- EQ37120ET

Review from a similar 4-Point Sway Control in Weight Distribution Hitch

Great product except for one thing. If you are going to sell this hitch either sell it with ball already attached or include the 1 7/8 thin wall socket with it. Could not find socket anywhere locally and finally had to dismantle Equilizer bar sockets which is no easy task , and then use regular socket that I already had, what a pain. Other than that great service and ultra fast shipping. I think I ordered it Tuesday night and had it Friday night. Great job. Will repost once all is installed and try it out. 275437

Best hitch on the market for anti sway and load equizling. Quick hook up, love it!
Jeff P - 07/23/2017


- EQ37120ET

Review from a similar 4-Point Sway Control in Weight Distribution Hitch

The Staff at etrailer made the purchase simple and very helpful in picking the right tow package product. Installation instructions were sent when the product arrived. Great product n company! Thank you so much Connie! 654652

- EQ37120ET

Review from a similar 4-Point Sway Control in Weight Distribution Hitch

I received this hitch about a month ago and couldn't install right at first due to some issues I was having but I have finally got it installed and set up right. This is great! I will go on my maiden voyage Memorial weekend but I'm sure it is going to perform as expected. Excellent price that no one can touch. Instructions are easy to follow and detailed the way it should be. Time, was about as expected, so don't rush because you don't want to miss any steps. 314559

Well I have owned this hitch for a year and it has worked flawlessly. In July we took our camper on a 2000 mile trip and we had no issues with the hitch at all. We were in all types of traffic through large and small cities, we didnt have any sway issues because the hitch, now broken in, works much better than I knew it would. I had installed the pads under the slide bars and use the grease to quieten it down when in all the turns I made during this trip. I dont believe there is a better hitch out there that can tame my 38 ft 9000lb Jayco than this Equalizer. Best money spent here. 11/7/17
Herman S - 11/07/2017


- EQ37120ET

Review from a similar 4-Point Sway Control in Weight Distribution Hitch

Was needing a weight distribution system for towing my 16' toy hauler and with Kats help from etrailer I couldn't be happier with this product. Trailer has a dry hitch weight of 950lb and 1100lb loaded. Set up took me an hour or so, but now I feel comfortable hooking and unhooking. Took it on a 100 mile trip a few weeks back in heavy rain with strong wind gust and handled great! Without it I didn't feel safe going 60mph on calm sunny day. 305707

- EQ37120ET

Review from a similar 4-Point Sway Control in Weight Distribution Hitch

I purchased this hitch for a 9000lbs travel trailer with a 1001lbs tongue weight. If your debating between a less expensive round bar and this setup, spend the money. This hitch is by far a better, easier, and safer setup. I purchased this hitch to replace a Pro-series round bar with a friction sway control bar. The Equal-i-zer's 4 point sway control is big step up from a single point sway control system. The 1st drive felt secure and safe. Install was easy, but time consuming for a 1st time installer. But worth it in the end. Here's some pointers. 1. get the right tools, rent or barrow a the torque wrench to do the hitch ball 430ft/lbs, and shank bolts 320ft/lbs. The piece of mind that it's correct is worth it. 2. Plan for the afternoon, not a couple of hours. 1st setup is going to be close but your going to have to adjust it so plan on taking something apart. but setup is relatively easy, esp with the right tools. I had the trailer level the 1st go around to 2.5". So I had to move the head up one hole in the shank and then it was within 1". Distribution setup was still with in a proper setup, so I didn't have to make any further adjustments. As far as the coupling and uncoupling the hitch. Using the tongue jack to release the tension is easy to do and quick. Esp. with an electric jack. I never liked the round bar with chain setup on my previous hitch. High quality, easy install and setup, and seems to have great sway control. 305090

- EQ37101ET

Review from a similar 4-Point Sway Control in Weight Distribution Hitch

Product is well made and sturdy. Installation instructions were simple and easy to follow. Took about 2 hours from start to finish to install. The problems it solved for me were the truck sagging in the rear when my car hauler is coupled. Now the truck is level along with the trailer. Also when semi's pass by the entire set up is steady. No shaking or swerving. Wish I had put this on sooner. Very pleased. 552541

After a year of use I can say that the Equalizer has lived up to its promise. It is extremely helpful when hauling autos around in our enclosed trailer. We consider it just part of the normal hauling equipment now.
Mark T - 08/14/2019


- EQ37120ET

Review from a similar 4-Point Sway Control in Weight Distribution Hitch

I have been hesitant to review this product as I have had several issues with it....not necessarily the product itself, but my use and application. To start out, I should have used a different drop down hitch. The one that came with the unit does not allow the ball to sit low enough for the trailer to sit level once everything is set. Get the right amount of weight transfer and the nose of the trailer sits high which has a negative impact on towing. Less weight transfer for a level trailer means to more truck nose lift, dangerous sway, dangerous driving. The worst part is that if I had been aware and asked to change the hitch, it might have only cost me 10-20 dollars. Now I need to purchase a new hitch with a bigger drop, which will cost me around 150 bucks. I do believe that this will make a big difference. As I have gotten the setup closer to correct, it does seem to work well. I do however feel that the teflon plastic slide pads for the L brackets would be a worthwhile investment as it is noisy when making slow speed turns, which can be dis-concerting 57823

You realize that the friction where the spring bar slides in the L bracket is responsible for the sway control right? Reducing the friction would reduce the sway control of the unit... I am interested to try this product. I think what you are saying about getting the right set up for your individual rig is the most important thing.
-- comment by: Donny - 02/01/2014


The nylon jackets may very well reduce the sway control ability of the unit. For some applications, the reduction is sway control is not problematic and sometimes the noise is just too much. It is up to the user as to what they need more, but the jackets are available for those that want to get rid of some of the noise.

-- Patrick B - 2/5/2014

- EQ37120ET

Review from a similar 4-Point Sway Control in Weight Distribution Hitch

I installed this hitch on my 2007 Toyota Tundra. I use to have the chain style. Big difference when getting next to rigs. This hitch is a much tighter tow. Glad I upgraded. 386771

- EQ37120ET

Review from a similar 4-Point Sway Control in Weight Distribution Hitch

This hitch setup is worth every penny. Install was not painful and instructions were clear. After setup was finished I took her for a spin and I was amazed at the difference. The ride was smooth and no sway!!!! No more friction sway control for me!! I would recommend this to anyone who is in the market for a WD hitch. 472980

- EQ37100ET

Review from a similar 4-Point Sway Control in Weight Distribution Hitch

I towed my camper over 250 miles with the equalizer hitch. Set up and install was very easy. Very little to no sway at all with passing semi trucks. 570215

Purchased last year year best sway control Ive owned. Easy hook up and disconnected from camper. Highly recommend.
Raymond L - 09/30/2019


- EQ37100ET

Review from a similar 4-Point Sway Control in Weight Distribution Hitch

From the first moment I called this was a wonderful experience. William B was the gentleman I got on the phone and he was very helpful and extremely knowledgeable about the product. He helped me order the right size hitch and it arrived in three days. I installed the hitch and while yes it’s noisy as other reviews say it is the best hitch I could’ve purchased. I own a 2014 Chevy Silverado 1500 and am pulling a 20’ enclosed V nose trailer. I can do 70 with no problem or any seaway whatsoever. Thanks again Will. 679579

- EQ37100ET

Review from a similar 4-Point Sway Control in Weight Distribution Hitch

I think this hitch saved our lives and probably others. This is my first "big" camper I've been towing trailers and pop ups for years. A 23' Grey Wolf Toyhauler with my 2011 Ford Expy as the TV out in front. I had been talking with more mature campers from work about the high prices of some of these WD hitches.... who wisely advised... don't go cheap on tires, brakes or hitches. I bit the bullet, took a little heat from the wife, cause I had it professionally installed too. (This thing is massive). I'll add pics next time I hookup. Plus rolling on $1200 of new Good Year AT's So me and my wife had just pulled out from Clabough's camp grounds after a week of great exploring, great weather and fun smoky Mtn motorcycle riding. We were heading north on 441, not to the highway yet. Probably not on the road more than 20 min or so driving through a small town. Maybe Severville Anyway, 4 lanes, maybe 40mph or 45mph. Following a car, and just talking. Then what seemed to be out of no where, I looked up to see the car was stopped at a red light right in front of us. When did that light turn red!! I had less than a second to react. I knew I couldn't stop. No one coming left or right at the intersection. No one to my right. It was tight, but I might be able to make it.... I swerved HARD right, then back with a HARD left... missing the car in front of us, and the sidewalk. We went sailing through the intersection totally unscathed... and THE CAMPER FOLLOWED ALONG PERFECTLY!! Silence. Neither of us said a word for what seemed like 5 minutes. I'm not even sure who spoke first. I recall someone saying like, did that just happen? And "we're not doing that again" So guys, it may seem like a lot of money, but I'd say it's pretty cheap. I'll just repeat what I was told... don't cheap out on tires, brake, or hitches. Happy camping. 422706

Show More Reviews

Ask the Experts about this Equal-i-zer Weight Distribution Hitch

  • Lubrication for Equal-i-zer Weight Distribution
    The only lubricant we recommend for use with the Equal-i-zer weight distributions is the Equal-i-zer High-Performance Lubricant # EQ91-00-4250.
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  • Best Weight Distribution System with Sway Control for a Tritoon Boat Trailer
    In order to help prevent and reduce trailer sway while pulling your boat/trailer with your 2014 Ford Expedition you are going to want to use a weight distribution system with integrated sway control. In order to determine which unit is correct for you, you will need to find the loaded ready to tow tongue weight of your trailer and add that to any cargo stored behind the rear axle of the tow vehicle. The sum of these two figures will be what is referred to as total tongue weight (TTW). This...
    view full answer...
  • Weight Distribution System Recommendation for 1,800 lb Trailer
    The best way to pick out a weight distribution system is to base it off of the loaded tongue weight of the setup when it is loaded and ready to tow. This figure also includes the weight of any cargo behind the rear axle of the tow vehicle. I attached a help article on determining tongue weight for you to check out as well. You will want the loaded tongue weight of your setup to fall right in the middle of the tongue weight range of the system you use. For an 1,800 lb trailer the tongue...
    view full answer...
  • Weight Distribution System to Provide Best Possible Ground Clearance
    With weight distribution/sway control (WD/SC) systems the best ground clearance generally comes from trunnion-style setups like the Equal-i-zer # EQ37040ET that you referenced. These systems' bars do connect to the side of the head assembly, rather than up into its bottom surface like round-bar systems such as Pro Series # PS49901. This is where their better clearance comes from. We do not offer any system whose bars attach to the top surface of the head assembly although one of my associates...
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  • Weight Distribution/Sway Control System for 1999 Featherlite 4926 20-Foot Enclosed Trailer
    The 20-foot Featherlite trailer model 4926 uses two 3500-lb axles and it has a dry weight of 2900-lbs according to the Featherlite online guide. But the key to choosing a weight distribution/sway control (WD/SC) system is knowing the actual tongue weight (TW) of the trailer when it is loaded up for the road, not just the empty trailer's dry weight. We offer a handy scale # 5780 that makes measuring TW easy. Since Featherlite trailers use aluminum construction I suggest checking with...
    view full answer...
  • Recommended Weight Distribution System for 2017 Rpod 178 Camper
    Thanks for the kind words! Before we get into the best weight distribution solution for your needs you should note that the best way to fight sway is in how you load the trailer. If you can move as much weight to the front of the trailer and make sure it is sitting as level as possible that will be your best way to prevent the sway. Now the best way to pick out a weight distribution system is to base it off of the loaded tongue weight of the setup when it is loaded and ready to tow....
    view full answer...
  • Economical Weight Distribution System for 3,000 Pound Trailer
    When picking out a weight distribution hitch the most important factor to consider is your total tongue weight. This number includes both the loaded tongue weight of your trailer plus any added cargo you have stored behind the rear axle of your Jeep Wrangler. Ideally this number will fall somewhere near the middle of the operating range for the system you choose. You mentioned a tongue weight of less than 350 pounds and a total trailer weight of less than 3,000 pounds. If these weights...
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  • Equal-I-zer Weight Distribution for an Airstream Sport with 375 Pounds Dry Tongue Weight
    I am assuming that the 375 pounds is the dry tongue weight. If that is the case then once the trailer is loaded and ready to tow it will be over 400 pounds. Also when calculating tongue weight for weight distribution you also have to add in the weight of anything loaded behind the rear axle of the tow vehicle. For example, if your tongue weight is 400 pounds and you have 100 pounds of gear behind the rear axle of the tow vehicle then the total tongue weight is 500 pounds. Between...
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  • Hitch Ball for Equal-i-zer Weight Distribution System
    Equal-i-zer weight distribution system # EQ37040ET, which is the same as the product you referenced does not require a 2-5/16" hitch ball; I took a look at the Equal-i-zer site and could not find a reference to that. However, if you need a 2-5/16" ball then the right one would be the 2-5/16" Hitch Ball for Equal-i-zer Weight Distribution Systems # EQ91-00-6100. It is also recommended you use Thin Walled Socket for Equal-i-zer Hitches # EQ70-00-4800 to make installation of this ball a little...
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  • Replacement L-Pins for 4,000 Pound Equal-I-Zer Weight Distribution System
    The replacement L-pins for the 4,000 pound Equal-I-zer Weight Distribution System # EQ37040ET are part # 90-03-9460. The clips for the pins are part # 90-04-9208.
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  • Weight Distribution System for a 2017 Jeep Wrangler Unlimited and 2,500 Pound Trailer
    The first thing you will want to do is make sure the trailer hitch on your Jeep is rated for use with weight distribution. Not all hitches are. If yours is then there should be a sticker on the hitch that lists a separate capacity when using weight distribution like the aftermarket Class III hitches, such as # 76104, that we have. Assuming the hitch is rated for weight distribution it is possible that the tongue weight capacity is still the same 350 pounds so keep that in mind because...
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  • Are The Sway Bars Of The Equal-i-zer Weight Distribution System Supposed To Be Greased?
    The Equal-i-zer Weight Distribution System w/ 4-Point Sway Control - 4,000 lbs GTW, 400 lbs TW # EQ37040ET uses 4 point metal on metal friction to control sway. You definitely DO NOT want to use grease on these trunnion bars. That would cause the system to not operated as intended.
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  • Weight Distribution for 2017 Ford Escape Towing Camper With 160 lb Tongue Weight
    In order to choose the best weight distribution system, you will first need to know your total tongue weight (TTW), which is the tongue weight of your fully loaded and ready to go trailer plus the weight of any cargo behind the rear axle of your 2017 Ford Escape. I am not certain if the 160 lbs you gave is the unloaded tongue weight, but the tongue weight is typically between 10% and 15% of your trailer's GVWR. You are going to want to verify this by using a scale such as the Sherline #...
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  • Maximum Distance For Mounting Sway Bracket For Equal-i-zer Weight Distribution System
    The maximum distance the center of the sway brackets can be moved is the 32-inches as described in the installation instructions. Moving the bracket out further could create a problem when making turns if the spring bar fell out.
    view full answer...
  • Capacity for the Head of the Equalizer Weight Distribution System EQ37040ET
    The head of the part # EQ37040ET is part # EQ90-02-0400 and has a 400 lb tongue weight capacity and 4,000 lb trailer weight capacity with the spring bars used or not. You may be thinking of how some trailer hitches have two weight capacities. One with a WD system and one without a WD system.
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  • Recommended Weight Distribution System to Maximize Towing Capacity on 2016 Honda Pilot
    When you are trying to get the top towing weight out of your 2016 Honda Pilot, you are wise in looking into a weight distribution system. The way you choose a weight distribution system is based mostly on the total tongue weight. The total tongue weight is the amount of weight in lbs resting on the hitch receiver when the trailer is loaded plus the weight of any cargo loaded in the tow vehicle behind the rear axle (in the cargo space). Too much tongue weight makes the tow vehicle sag...
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  • Replacement Parts To Make Equal-I-zer Weight Distribution System Compatible with Rpod Trailer
    The Equal-i-zer Weight Distribution System w/ 4-Point Sway Control - 4,000 lbs GTW, 400 lbs TW # EQ37040ET is the size you want for your 178 Rpod trailer. The 1000 lb system will cause problems for that small a trailer because it will be too rigid. I recommend getting the replacement parts to make the most of your free system and give you what will actually help you. You will want the Replacement Head for Equal-i-zer Weight Distribution Systems - 400 lbs TW # EQ90-02-0400 and Replacement...
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  • Best Weight Distribution System for a Keystone Outback 31
    The best weight distribution system we carry is the Equal-i-zer Weight Distribution System. This system has four point sway control which unlike most other systems will both prevent and reduce trailer sway. Most other systems only work to reduce trailer sway as it occurs but do little to prevent it from happening entirely. In order to choose the correct Equal-i-zer Weight Distribution System you will need to know your total tongue weight (TTW). The total tongue weight is calculated...
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  • Equal-I-zer Weight Distribution/Sway Control Hitch for Trailer with Loaded Tongue Weight of 400-lbs
    The linked video and article are great resources to give you all the important information you need to choose the right WD/SC system for your 3000-lb trailer. The real key is knowing the actual fully-loaded trailer tongue weight (TW) with all your usual gear and supplies loaded up. We have a handy scale # 5780 that makes it really easy to measure accurately (and frequently) so that you can develop a good sense for when your trailer is properly-loaded. Ideally the TW of a trailer will...
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  • Correcting Sag For A 2012 Toyota Rav4 V6 With Tow Package Pulling A 2,600lb Trailer
    What your describing is very common in towing because the tongue weight of your trailer is transferred to the rear axle. As a result the back end can slump and the nose of your vehicle point up, causing reduced traction and sometimes sway. To address this, weight distribution hitches help spread that load over the axles of both the tow vehicle and the trailer. The first thing you need to know to select a weight distribution hitch is to know your total tongue weight. To determine...
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  • How Tall of a Trailer Frame Will the Equal-i-zer EQ37040ET Weight Distribution Hitch Fit On?
    Yes. The Equal-i-zer # EQ37040ET will fit on trailers with frames as tall as 6", so this weight distribution hitch will fit on your trailer with a 3" tall frame. In order to install the hitch ball on your Equal-i-zer weight distribution hitch it is recommended that you use the Thin Walled Socket for Equal-i-zer hitches # EQ70-00-4800.
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  • Recommended Weight Distribution System and Sway Control for a 2011 Toyota RAV4
    When choosing a weight distribution system, it is key to know your trailer's loaded and ready to tow tongue weight. To this tongue weight you will need to add the weight of any cargo behind the rear axle in the back of your 2011 Toyota RAV4. Once you know the loaded and ready to tow tongue weight of your trailer, it will be easier to choose a properly rated weight distribution system. Also, double check your vehicle owner's manual to see how much weight your 2011 Toyota RAV4 can tow. It...
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  • Light Weight Weight Distribution System for 2008 Nissan Frontier Towing Camper
    Weight distribution systems are somewhat heavy, but a simple setup like the Equal-i-zer part # EQ37040ET would be your best option. It has sway control built into the head and bars so the weight needed for it is pretty minimal. It weighs in at 67 lbs. It has a tongue weight range of up to 400 lbs so it would be a great solution for your trailer's tongue weight as well.
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  • What 2-5/16-Inch Hitch Ball Fits Equal-i-zer 4-Point Weight Distribution System EQ37040ET
    The Equal-i-zer 4-Point Sway Control Weight Distribution System # EQ37040ET comes with a 2-inch hitch ball but a 2-5/16-inch ball # EQ91-00-6100 can be installed. A thin-walled socket like # EQ70-00-4800 is recommended for ball installation.
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  • Mounting of Equal-I-zer Brackets to Trailer When Propane Tank Tray Location Interferes
    For your Equal-i-zer Weight Distribution System w/ 4-Point Sway Control # EQ37040ET since your tray is right at that 25-32 inches back from the center of your coupler where your brackets need to be, the best solution to use this system is to drill into your frame and directly mount your brackets to the frame at the height you need. This may require modifying the height of your brackets depending on your tray and tank fit.
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  • Recommended WD System for a 2015 Honda CR-V Pulling a 1,400-lb Boat
    To determine which Weight Distribution (WD) system is correct for your setup you will first need to find the Total Tongue Weight (TTW) of your setup. This includes the Tongue Weight (TW) of your fully loaded and ready-to-go trailer as well as the weight of any cargo behind the rear axle of your 2015 Honda CR-V. Keep in mind that a correctly loaded trailer with have a TW that is 10-15% of its loaded weight. I recommend using the Sherline Trailer Tongue Weight Scale # 5780 to make sure that...
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  • Trailer Hitch, Wiring and Tow Capacity of 2018 Lexus RX 350
    I checked out the owner's manual for a 2018 Lexus RX 350 and it said the maximum towing capacity was 3,500 lbs, and the Curt Trailer Hitch Receiver # C13272 has a 4,000 lb towing capacity so you will not have any problems using this hitch for towing less than the 3,000 lbs you mentioned. That said, we do recommend verifying all towing capacity information with vehicle manufacturers as they have the final say on these matters. To complete the towing set up for your 2018 Lexus RX 350 with...
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  • Towing Package for a 2008 Honda Odyssey
    The trailer hitch I recommend for your 2008 Honda Odyssey is the Draw-Tite Max-Frame # 75270 because it doesn't require any fascia trimming (like the etrailer and Curt might). This, as well as the other trailer hitches, exceeds the weight ratings of your Odyssey so you can be confident that you are getting the most out of the trailer hitch. Be sure to check the weight ratings of your Odyssey in your owner's manual and keep from exceeding it. To finish out your towing setup I recommend...
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  • Replacement L-Pins for 6,000 Pound Equal-i-zer Weight Distribution System
    I do have an option for you, however the Replacement L-Pin # 90-03-9460 referenced in your question is only rated for the 4,000 pound Equal-i-zer Weight Distribution Systems like # EQ37040ET. For your higher-rated 6,000 pound system, you will instead need the Replacement L-Pins and Clips # EQ95-01-9430. This includes 1 pair of L-pins with the needed integrated clips.
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  • Brake Controller Installation in 2017 Chrysler Pacifica
    For your 2017 Chrysler Pacifica with tow package, I recommend the Tekonsha Prodigy P3 # 90195 for a brake controller. It has a really nice LCD screen to make it user friendly and has preset options for different trailer sizes for a good fit. You are correct that there is not a plug and play harness for your Pacifica, so it will need to be hardwired. If you don't already have a 4-way flat trailer connection, I recommend the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector...
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