Dexter Trailer Springs Over-Under Conversion Kit

Dexter Trailer Springs Over-Under Conversion Kit

Item # K71-385-00

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Dexter Axle Alignment and Lift Kits Accessories and Parts - K71-385-00
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Call 800-298-8924 to order Dexter Axle accessories and parts part number K71-385-00 or order online at etrailer.com. Free expert support on all Dexter Axle products. Guaranteed Lowest Price and Fastest Shipping for Dexter Trailer Springs Over-Under Conversion Kit. Accessories and Parts reviews from real customers.
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  • Reviews (70)
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Dexter Axle Accessories and Parts - K71-385-00

  • Trailer Leaf Spring Suspension
  • Alignment and Lift Kits
  • Dexter Axle


Features:

  • Allows moving leaf trailer springs to top of axle
    • For use with double-eye springs only
  • Fits 3" axle
  • Sleeve bolts allow the setup to install level
  • Includes:
    • (2) Spring Seats
    • (8) 1/2" Nuts
    • (4) Steel spacer nuts
    • (4) 7" Long x 4-1/16" wide x 1/2" diameter U-Bolts
    • (2) Tie Plates


K71-385-00 Trailer Springs Over-Under Conversion Diagram


K71-385-00 Dexter Axle Over/Under Conversion Kit



K71-385-00 Installation InstructionsInstallation Details K71-385-00 Installation instructions



Video of Dexter Trailer Springs Over-Under Conversion Kit


Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Dexter Axle Trailer Suspension - Leaf Spring Suspension - K71-385-00 Review

Today we're going to be taking a look at the Dexter trailer springs over-under conversion kit. This conversion kit is designed to fit 3 inch diameter axles. It's going to allow you to move the the trailer loose springs to the top of the axle without having to change the correct orientation of the axle. This is going to help with leveling your trailer. It's going to help with wheel well clearance. It also adds some height to prevent dragging, dipping, and bottoming out.

One kit is going to come with enough components for one axle, so one kit per axle. This is designed for use with double eye springs only. The unit is going to include 2 spring seats. These are going to sit on top of your axle. It's going to come with 8 nuts. You're going to get 4 U bolts, 2 tie down plates.

The tie down plates are going to sit on top of your loose springs once you have them moved to the top of the axle. It does have all the holes in it, that way the U bolts can wrap around the axle and come up through the plate. Then, you would secure it by installing the included nuts. It's going to come with the spacer nuts. These are going to allow the set up to install level.

Basically, you would have 1 spring seat on top of the axle, then your old spring seat would still be under the axle. The spacer nut is going to fill the gap between the 2 spring seats, so they thread on to the bolts that are welded on to your new seats right here. Again, it's going to fill the gap between the 2 spring seats. You would place this on until it makes contact with the bottom spring seat. Then, what you would need to do, which is highly recommended from the manufacturer is you would tack weld this to the axle to prevent the axle from slipping.

Then, you can finish the tightening process or make any minimal adjustments simply by using a wrench. Everything that you see here on the table is included. It's going to come with detailed installation instructions as well to help walk you through the installation process step by step. It is a bot on installation with some recommended tack welding. Overall, it's a nice unit. We're looking at all steel components, so nice, strong, durable design. Again, this kit is designed to allow you to move the trailer loose springs to the top of the axle without having to change the correct orientation of the axle. Again, it's going to help level the trailer. It's going to help gain some extra wheel well clearance, and it's going to help add some clearance to prevent those situations where you may be dragging, dipping, or bottoming out. That's going to do it for today's look at the Dexter trailer springs over-under conversion kit.


Customer Reviews

Dexter Trailer Springs Over-Under Conversion Kit - K71-385-00

Average Customer Rating:  4.7 out of 5 stars   (70 Customer Reviews)


- K71-385-00
by:

Contacted Jennifer at 4 PM on a Wednesday informing her that I ordered the wrong size axle spring conversion kit. I asked if she could do her best to get it to me as soon as possible. Whatever she did, it was on my porch by 8 AM the next morning. Job Well Done. Will use again 458459



- K71-385-00
by:

Works as advertised After all is said and done it is still recommended To tack weld the spring pad in place. This defeats 90% of the do-it-your self. Easier to remove axle and fit/weld new spring pads for perfect alignment. 306760



- K71-385-00
by:

This over-under kit made it extremely easy to move the axles on my Camper. The spring seats with the adjusting nuts made it easy to keep them aligned for welding. I reused my old tie plates because of my shocks I uses a price of 3x3x1/4 angle to bolt the shock to the tie plate. I had read that some people had problems if the had shocks. This gave my camper the extra ground clearance I needed. 677444



- K71-385-00
by:

arrived in 4 days installing this weeke nd 207257



- K71-385-00
by:

Part was good, however I sold trailer before I installed the parts. Would shop again. 404682



- K71-385-00
by:

Kit arrived missing all but 2 of the ubolt nuts. No biggie, had some on hand. Went to install ubolts and they were too short. Bought new ones. Went to use top plate and it was too narrow. Had to make new ones. Only thing I used was the axle perches... Which you can buy anywhere. Total waste of money. Make your own kit like I ended up doing. 225292



- K71-385-00
by:

If you find you've bought a trailer from someone and found you didn't look at it close enough before you bought it and find the axels are upside down, this is a great fix. Nice kit at a good price and fast shipping. Thanks etrailer. 347429



- K71-385-00
by:

Used two kits on a 10k equipment trailer, with 2, 6k lbs axles. The trailer is an Appalachian 16ft with drop down axles and scrapes coming in and out of my driveway badly. It’s used from equipment hauling to mulch and stone. I had to reuse the old plates. The ones provided were’nt wide enough to accommodate the springs by about 1/4- 1/2inch, although they seemed slightly more robust. I also added washers to the u-bolt nuts. Otherwise I would’ve rated it a 5. I followed the instructions and tack welded the new spring seats in place. Each trailer is different, so as a general kit, this worked very well and I would recommend it. This one actually gave me more clearance than I wanted. I didn’t actually measure spring seat to spring, but I estimate on a 3 inch axle it gave me 5-6 inches of lift. All said and done I feel comfortable that it will safely handle a 10k lbs load. 540073



- K71-385-00
by:

Worked great 31inch tires on trailer for mountain roads. 409627



- K71-385-00
by:

It went together fine, lifted the trailer bed a good 5-6 inches off the tires and looks strong; time will tell. First picture is BEFORE, 2nd pic is AFTER 414071



- K71-385-00
by:

Fast shipping, great product that installed without a hitch. Worked great. 364542



- K71-385-00
by:

I have a 99 cummins with 35s and a 5 inch lift. My 5th wheel now sits level and I even raised the king pin up another hole. I'd definitely buy this again 252516



- K71-385-00
by:

Haven't installed yet but looks good in the box and I know anything from dexter is good stuff so I'm not sweating it.... 116030


Comments

Very happy with the product. Trailer toes so much better not that its level with my truck. The extra clearance helps a lot to when towing off-road to the remoter camp spots we like .

Dan a - 02/07/2015

9350

- K71-385-00
by:

Would have given 5 stars except that one of the kits was provided with the wrong size nuts for the u bolts. Luckily, I was able to utilize a set of my origional u bolts which are better quality than what was provided with the kit. 252187



- K71-385-00
by:

After buying a new truck I discovered that my 5th wheel was going to be too low to pull level. after doing some research I found your product which was what I was looking for. I ordered it and in 2 days it was delivered . Every thing went well in installing . The only problem I encountered was the plates did not contain a place to mount my shocks, after doing a little modifying I was able to use my old plates on top of the new ones and mount my shocks. Perhaps you could provide a plate that would have the hole for shocks. 107458


Comments

Very well no problems

K71-385-00 K - 11/15/2014

7697

- K71-385-00
by:

Received the package on Friday afternoon. Reviewed the instructions and postings @ E-Trailer. Pulled the trailer up in front of the house at 0930 Saturday morning and drove it away about 4pm. The biggest time killeer was as others have mentioned getting the 11,000 pound trailer up high enough and safe enough to do the job. Thanks for checking up on me. 135664



- K71-385-00
by:

Great do-it-yourself kit. Worth the mon ey. 130056


Comments

Quality product without any problems! recommended

Mac - 05/12/2015

11615

- K71-385-00
by:

I have ordered from etrailer in the past and have always been pleased. I ordered the items the evening of 25 Oct 2018 and received them 27 Oct 2018 and my order was with free shipping. Normally company's that offer free shipping tend to set these orders on the back burner to ship out products where customers pay for the shipping. This wasn't the case with etrailer and I will continue to do business with them. 578232



- K71-385-00
by:

These we easy to install and gave my trailer the lift needed so I can now back the trailer up without scraping or bottoming out. 719879



- K71-385-00
by:

Product works perfectly and exactly as advertised. The only reason I didn’t give five stars is because the u-bolts aren’t very stout. In fact my factory ones were quite a bit larger. 696696



- K71-385-00
by:

ETrailer has always done well by me. I used the kit to flip my axles. So 2 kits. Worked well but I did tack weld them like the kit recommended. Raised the trailer 5 or 6 inches so it doesn’t scrape the driveway up any more. No difference in handling when I am towing. I did have to re set up my hitch on the truck. Hardest part was jacking up the camper and dragging the axles out in the yard. 675119



- K71-385-00
by:

I used two sets of these on a tandem axle utility trailer that I'm rebuilding. The previous owner had flipped the axles using the original spring seats which made the axle and brakes upside down. These worked well for reinstalling the axles correctly. The only problem that I had with these is one stud welded to each spring seat appeared to be closer to the axle then the other. The axle would contact the long nut on that side and prevent it from turning unless you installed the spring seat with the nut fairly close to its final position. I had wanted to install a jam nut behind the long nut to prevent it from backing off but the axle interference issue prevented that. I'll find another way to lock the long nuts from backing off. The set does have good quality components and makes it easy to get your axle position correct. I followed the recommendation in the instructions and tack welded the the spring seats to the axle. 673813



- K71-385-00
by:

This conversion worked out great lifted the trailer perfect 670109



- K71-385-00
by:

Easy enough...worked. Could have washers for U bolts but other than that it’s rather straight forward. 665166



- K71-385-00
by:

This kit made the flip easier than new axles and I really think it’s probably stronger. Well worth the money and time to do it this way. 661804



- K71-385-00
by:

Received the product on the day specified at 4 p.m. installed in less than 2 hours ....great product 633582



- K71-385-00
by:

Excellent service received just what I ordered in a timely manner 595597



- K71-385-00
by:

Been great for a year now! Install went easy and is still working great. Ended up welding the purches onto the axle tubes like recommended in directions 565961



- K71-385-00
by:

The products I ordered were high quality, and the service was excellent. I placed the order on Monday morning, and they shipped it before noon. I received the items on Wednesday at 2:00 PM. You can't get any better than that! 564755


Comments

Excellent! I am extremely happy that I chose etrailer for my supplier. If I had to do it over again, I would deal with you, without a doubt.

Roy S - 09/13/2019

61093

- K71-385-00
by:

Great product. Better yet, etrailer.com customer service is fantastic!!!!! 542512


Comments

No problems, it’s exactly what I needed and works great.

Dan - 07/16/2019

57870

- K71-385-00
by:

great product,easy install,very fast de livery 511855



- K71-385-00
by:

Great product...Install was easy and the parts supplied were top quality. I would highly recommed this company and would buy from them again. 499642



- K71-385-00
by:

I installed this over under kit with NO problems at all,very easy to follow instructions.This kit lifted my t t to just the right height for the ground clearance I was looking for.I used our t t several times over very bad roads with no problems . Thanks for the fast service. 471107



- K71-385-00
by:

These worked great giving me the clearance I needed for my 5th wheel trailer. 409836



- K71-385-00
by:

The best and only way to do a good safe axle flip without measuring fifteen times to keep camber. 403206



- K71-385-00
by:

These worked great. I had my trailer done in 4 hours. 384564



- K71-385-00
by:

Product is of very good quality, it fit well and did exactly what it was supposed to do, well designed and fairly easy to install, I use my trailer more than most people do and I have been totally satisfied with the parts that I purchased, flipping the axles leveled the trailer right up & it pulls great 380202



- K71-385-00
by:

Great customer service! I ordered the wrong size originally and they exchange it even on a Sunday afternoon. I will definitely recommend! 362639



- K71-385-00
by:

Really Fast shipping & Reasonably Price d.... 355171



- K71-385-00
by:

No problems 339824


Comments

All is good. Thanks for asking.

Mike A - 02/08/2018

34407

- K71-385-00
by:

Have not built a trailer in 30 years. This is apicture of the one i built for good friend. This turn out very nice, heavy duty . All suspension and lights came from E-Trailer . This is the best place to buy and get information. Thank you, Ed. 328968



- K71-385-00
by:

Product worked great give the tire clearance I needed very easy to install camper like a dream. 310749



- K71-385-00
by:

Worked excellent! 297131



- K71-385-00
by:

The husband used this to flip the axle on our fifth wheel. The fifth wheel was an older model (2007) and the king pin was too short to ride level with our 2014 3/4 ton truck (bed was too high) and I didn't want the truck lowered. It road nose high with the back end scraping on driveways and such. So the axle was flipped which raised the trailer about 4" overall. The trailer was perfectly level with the truck. There are you tube video's showing how this is done. The husband has had to tighten these three times this year (he checks it every time we take the trailer out). We could not find anyone to weld this on for us. And I don't weld, but whatever. It works without welding. Pictures aren't great but it gives you an idea how these have held up. 269201



- K71-385-00
by:

This product looks good but I decided not to install it. It ended up that after installing the Reese 5th wheel hitch I had around 5 inches of clearance between my bed rails and the trailer and after lowering the trailer weight onto the hitch it wasn't too much out of level and I haven't had any trailer tail dragging. 239365



- K71-385-00
by:

Item came very fast. Looks to be fairly easy to install. It should level my 5th wheel. I will buy from e-trailer again 235286



- K71-385-00
by:

Product is well designed. The ability to install on a 3" axle without welding is a plus. 2 guys, a floor jack and 2 jack stands along with the proper tools and 2 hours to install complete. Left trailer attached to the truck and lifted the rear to make the conversion. What a breeze. 234865



- K71-385-00
by:

It was easy to install, Hardest part was getting the rv raised up high enough to clear the axle. 217602



- K71-385-00
by:

Etrailer service great again, Repeat customer with this order and will continue to buy from them. I ordered my kits on-line early AM and they shipped out same day, delivered to me the next day. Kit goes together very easily. Especially if you just cut the old u-bolts off like I did. I had a couple hours doing my tandem axle car hauler. Only issue is neither kit I received had enough nuts in it, I only got 2 nuts in each box. The u-bolts are 1/2-20 Thread size (same as Older Ford Lug nut) if someone else has the same issue. I am sure etrailer would of made this right but I got it on my own. 216816



- K71-385-00
by:

Great product. Used it to lift our 1992 camper travel trailer. The kit was easy to use and gave me about 5 inches of lift by moving my axles from the top of the leaf springs to the bottom of leaf springs. 209194


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Ask the Experts about this Dexter Axle Accessories and Parts

Do you have a question about this Accessories and Part?


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  • Difference Between Available Dexter Torflex Lift Kits
  • The Dexter Torflex Lift Kits are designed for use with Torflex axles. The differences in the kits we have available have to do with the specific model Torflex axle they are compatible with, along with the number of axles that are on the trailer. The Dexter Torflex axles feature a torsion arm type suspension and attaches directly to the trailer frame. You will first want to make sure this is the type of axle you have on your trailer. The Torflex Lift Kit # K71-707-02 (Tandem Axle) is...
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  • Trailer Axle Over-Under Kit to Raise Height of Trailer
  • You can increase trailer height by welding on taller spring hangers but there is also another way to lift a trailer without having to cut off the old hangers and weld on all new ones, an axle over-under kit. Kit # K71-384-00 for 2-3/8-inch diameter axles and kit # K71-385-00 for 3-inch axles are bolt on kits that place your leaf springs above the axles, as shown in the linked photo. The amount of lift you get will be the sum of the axle diameter plus the height of the spring stack. So,...
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  • Installation of Lippert Components Tandem Axle Lift Kit LC407131
  • Lippert Components Tandem Axle Lift Kit # LC407131 provides approximately 2-inches of additional ground clearance for a tandem axle leaf spring suspension trailer. This is not a block kit but an adjustable extension kit. The kit requires no welding, but just some drilling into your existing hangers for installation. I have linked the complete instructions and the included photo shows how the kit's main components, the hanger plates and hanger spacers, install along with your existing...
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  • Can Skid Wheels be Used to Help Keep 5th Wheel Trailer from Bottoming Out with Steep Driveway
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  • How to Raise the Height of a 5th Wheel Trailer Without Flipping the Axles
  • To gain height without flipping your axles I recommend doing 2 things: replacing your leaf springs with ones that have more leafs and changing out your hangers for taller ones. You can probably get away with just swapping out your hangers but unless you only have something like 2 or 3 leaf springs and you want to gain height you would have to go with at least 4 or 5 leafs to gain enough height. When replacing leaf springs be sure to choose new ones that have a weight rating that matches...
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  • Recommendation for Gaining 2 Inches of Ground Clearance on 5th Wheel or Travel Trailer
  • For your 2018 Crusader M29BH 5th wheel trailer, the easiest way to safely gain a couple inches height is to use the Dexter Over-Under Kit # K71-385-00 for 3 inch axles or # K71-384-00 for 2-3/8 inch diameter axles. This will raise your trailer at each axle by the diameter of the axle plus the spring stack height without changing anything else on your trailer. This is often referred to as flipping your axles. You may also consider the Ultra-Fab Skid Wheels 6" Diameter - Qty 2 # UF48-979013...
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  • Recommendation for 1-1/4 Inch Ball Mount with 8 Inch Rise
  • Based on the measurements you took on your trailer hitch and trailer coupler, you will technically need a ball mount that features a rise of around 8-1/2 inches for a completely level setup. Between the two ball mount options you mentioned, the Curt Class II Drawbar # C45014 will be the better option, as it provides a greater 5 inch rise. The highest rise ball mount we currently have available that will be compatible with your existing 1-1/4 inch Curt trailer hitch receiver is the Curt...
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  • Axle Over-Under Kit and Suspension Parts for 2004 Weekend Warrior SL3705 5th Wheel
  • We offer two versions of the Dexter Axle Over-Under Conversion kit, often called a flip kit, that are to be selected based on the diameter of the trailer's axles. Kit # K71-384-00 works with 2-3/8-inch diameter axles and kit # K71-385-00 works on 3-inch diameter axles. Once installed each kit will lift the trailer by the sum of the axle diameter plus the height of the leaf spring stack. For example, a trailer with 3-inch axle that has a 2-inch tall leaf spring will pick up about 5-inches...
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  • Will Over-Under Kit Raise Height of 5th Wheel Trailer with Leaf Springs Above the Axles
  • If your leaf springs are already located above your trailer axle then the Dexter Trailer Springs Over-Under Conversion Kit # K71-385-00 won't change anything as its designed to relocate axles from above the leaf springs to below the leaf springs. There are a few other ways that you can still add some height to your trailer though. We have the Lippert Tandem Axle Lift Kit # LC407131 which will raise your trailer up to 2", you can change out your hangers (see linked list of products),...
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  • Can Spacer Blocks be Used on Fifth Wheel Trailer to Get Nose Down
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  • Is a Lift Kit Available for Rockwood Fifth Wheel Trailer?
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  • Over-Under Conversion Kit for 3" Dexter Axle
  • You can absolutely use the Dexter Trailer Axle w/ Electric Brakes # 8327820-EB and put them below your leaf springs. What you need to do is use the Trailer Springs Over-Under Conversion Kit # K71-385-00, so long as you have double-eye leaf springs; which will then be on top of the axle like you wanted.
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  • Alternative to Leaf Spring Spacers to Lift Trailer
  • Although we do not have spacer blocks of that dimension we have an option for you that will allow you to lift your trailer with what is called an over/under conversion kit. This moves your trailer's leaf springs to the top of your axle and lifts your trailer approximately the same amount as your axle's diameter plus the height of the leaf spring pack (please keep in mind this conversion kit is for use with double-eye springs only). The accompanying photo a customer sent in shows the...
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  • Trailer Suspension Lift Kit for 2017 Airstream Sport 22 Single Axle Travel Trailer
  • A bolt-on axle over-under kit like # K71-384-00 and # K71-385-00 will typically give your trailer between 4 and 5-inches of lift. The exact amount of lift depends on the axle diameter and the height of the leaf spring stack. Lift will be the sum of the axle diameter plus the height of the spring stack. Kit # K71-385-00 works for axles with 3-inch diameter Installing an axle over-under lift kit on a trailer is not a complex job but it does require the right safety equipment to avoid...
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  • 5th Wheel Hitch With Maximum Height for Most Trailer-to-Truck Bed Rail Clearance
  • Thank you for the photo of your 2016 Ram 3500's bed rail which sits 59-inches above ground. You are correct that the recommended minimum clearance between a bed rail and the underside of the trailer's overhang is 5 to 6-inches, as shown in the linked diagram. Since your trailer sits lower than your truck you'll need some height adjustment to tow safely. By chance is your truck lifted? Lifted pickups are not ideal for 5th wheel towing for the reason you have already discovered. Even some...
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  • How to Adjust 5th Wheel Towing Setup So That it is Level
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  • Recommendation for Trailer Bumper that Drags Up Driveway
  • For your trailer that drags when pulling into a driveway, I first recommend looking into skid wheels like the Ultra-Fab Skid Wheels # UF48-979011. These sturdy steel wheels will attach to the rear of your trailer to help prevent the tail from dragging when backing up or going up your driveway. You will simply weld the included brackets to your trailer and then bolt the skid wheels to the brackets. These are designed for low-profile trailers or motor homes that are up to 30 feet long. If...
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  • How to Tow a 5th Wheel Trailer Level with a 2018 Ford F-350
  • I do have an option for you but you are not really going to know the angle or distance between the bedsides and nose of the trailer until you attach it to your tow vehicle. As you mentioned, you will want to have at least 6" between the bedsides and nose of your trailer. This can more than likely be achieved by adjusting the hitch and or kingpin. The B&W Companion OEM 5th-Wheel Hitch part # BWRVK3300 for 8' beds will offer adjustments from 16-3/4" - 18-3/4" and the B&W Companion OEM 5th-Wheel...
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  • Should I Use Leaf Spring Spacers Lift Blocks on a Trailer to Raise It
  • I do not recommend using a leaf spring spacer (lift block) on your trailer. The reason for this is because they can cause the trailer to become extremely bouncy and rough which is just going to put more stress on your suspension and wear out the trailer faster. Instead, I recommend using an axle flip kit so long as your axle is over the leaf spring pack. If so then you can use part # K71-384-00 if you have a 2-3/8" diameter axle or part # K71-385-00 if you have a 3" diameter axle. This...
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  • Recommendation For Over-Under Conversion And Suspension Upgrade For Coachmen 5th Wheel
  • Based on your information, I recommend the Dexter Trailer Springs Over-Under Conversion Kit, Item # K71-385-00. This kit works with 3 inch diameter axles and includes enough components for one axle. The kit will also help level out your trailer and provide some extra wheel clearance. I have created a link to our selection of cushioned equalizers to help you upgrade your trailer's suspension. You will need to select equalizers that match the bolt hole dimensions of your current ones...
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  • Trailer Suspension Lift Kit for 2004 Starcraft Centennial 3600 with Single Torsion Axle
  • A pop-up camper trailer like your 2004 Starcraft Centennial 3600 will have either a leaf spring suspension, a torsion axle suspension or if it was modified by a previous owner it could have a Timbren axle-less suspension kit like # A35RS545. Torsion axles do connect directly to a trailer frame and their rubber cord "springs" are internal, inside the axle tube. Chances are this is what you have if you don't see any leaf springs. We do have lift kits # K71-384-00 and # K71-385-00 for...
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  • Will The Equa- Flex or E-Z Flex Equalizers Increase the Height of My Dutchman Kodiak Trailer?
  • Your current clearance measurement is concerning. You should have about 4.5 inches from the top of your tire to the floor in order for you to have adequate clearance from bumps when traveling. Either the Lippert Equa-Flex ,part # LC279688, or the Dexter E-Z Flex, part # K71-653-00, will work for your trailer, even though they are rated for heavier weights. But increasing the height of the equalizers alone would not be sufficient. You would also need to increase the height of your spring...
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Info for this part was:

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Updated by:
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