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Dexter Trailer Springs Over-Under Conversion Kit

Dexter Trailer Springs Over-Under Conversion Kit

Item # K71-385-00
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Moves your trailer's leaf springs to the top of your axle. Works with 3" diameter axles and double-eye leaf springs only. Call 800-298-1624 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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Dexter Axle Accessories and Parts - K71-385-00

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

Moves your trailer's leaf springs to the top of your axle. Works with 3" diameter axles and double-eye leaf springs only.


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

Installation 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:  4.8 out of 5 stars   (121 Customer Reviews)

Moves your trailer's leaf springs to the top of your axle. Works with 3" diameter axles and double-eye leaf springs only.

- K71-385-00
by:

I replaced my RV's axles to 6000# and used the conversion kit as part of that upgrade. I am very pleased with the product including the shipping and the installation. The U-bolts were too short for the new leaf springs I installed. I had the U-bolts custom made at a suspension shop to replace the stock bolts.



- K71-385-00
by:

I like the Product, but the packaging had problems. Out of the 6 sets I bought 4 sets only had 3 Ubolts in the box.


Comments
Thank you for leaving a review and for bringing this to our attention. Our customer service team should be reaching out to you in the near future.
-- Etrailer Expert Brooke M - 11/12/2021


- 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.



- K71-385-00
by:

This is the easiest kit to use and install when doing an axle flip conversion to your trailer or camper. I did it on my 2004 forest River wildwood 5th wheel. I needed extra ride height and from my Curt Q20 with slider, it sat too much at an angle and was jarring and jerking after every bump I hit. So I installed this kit and it gave my camper about 6” of lift and looks taller! The spacers on the perches made everything easier when reinstalling the axle. Make sure your measurement is right on both sides!!! That is very crucial so your axle isn’t lop sided or twisted! I tack welded the perches to the axle to added strength. You don’t have to but recommended. After towing it approx 35 miles back home from my shop, i was a little nervous since I raised the center of gravity but I drove normal and it towed great!! Camper sits absolutely level and hardly no jerking! I highly recommend this kit to whoever wants to flip their axles !!



- 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.



- 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.



- 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.


Comments
After a year I am still very happy with flipping the axles on my 2005 Jayco. The hitch and rear bumper have not scraped on the ground all year. Well worth the time and money.
Todd - 07/25/2020


- 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.


Comments
I have had this kit on my trailer for about a year now and have had zero issues with the kits. For anyone looking to raise or lower a trailer this kit is an easy way to ensure that you get your spring seats lined up correctly.
Eric J - 07/23/2020


- 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



- 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



- 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.



- K71-385-00
by:

I have pulled the trailer over 6000 miles and it is doing great



- K71-385-00
by:

It was exactly as described, shipped fast and was perfect for lifting up my rv



- K71-385-00
by:

Kit was packaged excellent. It lifted my trailer enough to help my clearance issue. The directions are good and products are well made. Easy to install with the right tools. Very happy!



- K71-385-00
by:

Worked perfect for flipping my fifth wheel axles. Watched a couple of videos and followed the instructions. Took about a full day doing this by myself. Definitely recommend welding the perches once in place.



- K71-385-00
by:

Fantastic product however what was super impressive was the customer service. About an hour after making the order online I received a phone call from a customer service agent who wanted to verity contact details in order to ensure a smooth delivery of my products. Everything showed up as promised well packaged and on time. I will definitely use etrailer again in the future



- 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.


Comments
The lift kit works great! No more bottoming out when I pull the trailer into the driveway ??
John H - 10/24/2020


- K71-385-00
by:

easy install, took about an two hours, including blocking, but that was with benefit of a grease pit. only thing that would be nice is if instructions had been protected, as both sets were illegible, but I viewed on site



- K71-385-00
by:

All parts fit with just minor grinding. Which was to be expected. But the part that I liked the most was the costumer service. I can’t remember the girls name. But it was the kit that I wanted and needed. But everything on the specs wasn’t exactly what I needed according to your website. And dexsters website directly. According to the website the u bolts were going to be to small for what I needed. Nothing was adding up. It was bothering the girl that was helping me on the phone that it wasn’t making sense. So she had a tech go into the warehouse and cut a box open to verify if the manufacturer was correct or not. Which it turns out that the manufacturer was wrong on the u bolts. They were the bigger ones that I needed. Once again I can’t remember her name. But thank u again for going out of your way to help me out. Great customer service.



- K71-385-00
by:

I recently purchased a lift type kit from another supplier online. They guaranteed delivery with in 10 days. After a month they said it was delayed but still coming. A few days later the company notified me it was discontinued. getting my money refunded was another ordeal, luckily my credit card company solved the matter. I then remembered a past experience dealing with E-trailer. The sales staff was very helpful and got what I was looking for very promptly. So I Visited etrailer and found something better. When I contacted them with questions they responded with plenty of useful info and a very helpful video for install. Very pleased with the prices , selections, quality and they're dedication to customer service. When the weather warms up I will be ready to install my suspension kit. For my next purchase etrailer will be my first stop.



- 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.


Comments
Very well no problems
K71-385-00 K - 11/15/2014


- K71-385-00
by:

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



- 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!



- 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



- K71-385-00
by:

Great product. Made my fifth wheel level with my pickup. Clear easy to follow instructions ensure correct installation.


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Ask the Experts about this Dexter Axle Accessories and Parts

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    The best way to lift your Jayco Eagle is called an over/under conversion kit, which 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). I have added a photo which displays how the kit will look after being installed. If you have a 2-3/8" round axle you would need Dexter Trailer Springs...
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  • Over/Under Kit For 2016 Jayco North Point 5th Wheel Trailer
    Your 2016 Jayco North Point 5th wheel trailer will have 3 inch diameter tandem axles, so what you will need are two of the following over/under kits: - Dexter Trailer Springs Over-Under Conversion Kit # K71-385-00 These will do a nice job of adding some rise to your Jayco trailer, because they move 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.
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    When moving the leaf spring stack above the axles using an over/under conversion kit such as # K71-385-00 there is the potential for more travel in the trailer suspension. Double-eye springs are fine because they are bolted on. The excessive travel would not affect them like it would a slipper spring which is just sort of hanging on to a hanger on one end. But there is still a solution for your trailer with slipper springs. All you have to do to get additional height with slipper springs...
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  • Installation of Dexter Kit # K71-385-00
    I have checked the installation instructions for the Dexter Trailer Springs Over-Under Conversion Kit # K71-385-00, and according to Dexter they strongly recommend tack welding the spring seats in place. Please note that this kit is intended for use with a 3 inch diameter axle and one kit is required per axle. If you have a 2-3/8 inch diameter axle then the # K71-384-00 kit is recommended.
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  • Does Flipping a Single Axle Cause a Drastic Change in Tongue Height
    The tongue height of your trailer is going to increase in relation to the amount of lift gained from the Dexter Trailer Springs Over-Under Conversion Kit part # K71-385-00 for 3" axles or part # K71-384-00 for 2-3/8" axles. The amount of height you gain will be equal to the diameter of the axle plus the height of the leaf spring seat and stack. Basically, the over under kit raises the trailer's frame and since the coupler is attached to the frame, it is going to raise that as well. In...
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    You're certainly on the right track, with the exception of the leaf spring U-bolt kit. The # K71-385-00 is meant for a 3500 lb axle, and wouldn't fit your 2000 lb axle correctly. The U-bolts would be too large. If you want to keep the axle mounted under the leaf springs, you'll just need the # APUBR-10 U-bolt kit. If you were wanting to mount the axle beam above the springs which would lower the trailer's ride height by roughly 2 inches, you'd use the same # APUBR-10 bolt kit as well...
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    Image 1 for
  • Which Over Under Axle Kit for Big Tex Trailer with 3,500 lb Axles
    The diameter of your trailer axle will determine the size of the parts that you will need to order. If your axle is 3 inches diameter, the Dexter Trailer Springs Over-Under Conversion Kit, # K71-385-00, would be a great choice and if your axle is 2-3/8 inch diameter you could use the Over-Under Kit, # K71-384-00. These kits can be installed without welding but the manufacturer strongly recommends having the new spring seat tacked in place on the other side of the trailer axle. Since...
    view full answer...

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    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Mike L
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Mike L
Employee Robert G
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Robert G
Employee Michael H
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Michael H
Employee Jameson C
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Jameson C
Employee John H
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John H
Employee Adam R
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Adam R
Employee Lori W
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Lori W
Employee Rachael H
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Rachael H
Employee Jeffrey L
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Jeffrey L
Employee Cole B
Installed by:
Cole B
Employee Wilson B
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Wilson B
Employee Matthew E
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Matthew E
Employee Noah M
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Noah M

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.