Determining The Correct Replacement Leaf Springs For Tandem Axle Trailer W/ Square Axles

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Question:

I have a 2006 Venture VBT-3700 tandem trailer with 2inch square, 3,500 lb. axles. I measured the leaf spring at 26.5inch center to center of the eyes, but this doesnt seem to be a standard length - possibly the springs stretched? Would you be able to provide the correct replacement leaf springs, shackle straps, hangers and triangle equalizer for a full replacement? is there a kit offered for a full replacement instead of individual parts? Thank you!

asked by: Spencer

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Expert Reply:

I would be happy to help you find the correct replacement suspension components for your trailer, but you will need to take a few measurements first.

Starting with the leaf springs, you will need to make sure that the tires on the side of the trailer you are working on is off the ground with the trailer supported by the frame as the leaf springs will stretch when the tires are on the ground and weight is applied.

If your 26-1/2" measurement was with the tires off the ground the closest option is the # e27SR which is for 4,500 lbs axles and is 26" long which would work as a replacement as it is not uncommon for a spring to stretch 1/2" over time. A Even though this spring is slightly higher rated it will still work perfectly on your trailer.

Moving on to the rest of the suspension, there are kits like the Dexter Heavy-Duty Suspension Kit for Tandem-Axle Trailers - 1-3/4" Wide Double-Eye Springs # K71-448-00 which include new equalizers, shackle straps, but you would need to measure the distance between the horizontal mounting holes in your current equalizers, and the distance on center of the two holes in your shackle straps. The # K71-448-00 has 6" equalizers and 2-1/4" shackle straps as shown in the included diagrams.

If you are wanting to remove your current hangers and start from scratch you can use the Tandem-Axle Trailer Hanger Kit for Double-Eye Springs - 2-1/2" Front/Rear, 5-7/16" Center # APT3HD which includes the equalizers, shackle straps, bolts, and hangers. You will need four of the 4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles - 25-1/8" Long # e54SR and two of the U bolt kit # CE23103 for your 2" square axle.

I included videos of the products mentioned for you to take a look at.

expert reply by: Samuel C

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Answer 1

The shackle straps do not have a taper and should not be over tightened to the spring or hanger because they are designed to move and pivot. Some bolts like #166081 will have a spline near the head to hold that shackle tightly on one end and you can…

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Answer 2

The most important factor for picking out replacement leaf springs for your trailer is to first go with the correct weight capacity and then secondly the correct length. If your boat weighs 3,800 lbs alone you'll need much higher rated springs.…

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Answer 3

There is no specific torque rating for shackle bolts. You'll want to ensure that the bolts you use are long enough so that when installed you will have at least 2 threads protruding from the nut. Make sure that the bolt you're using has a…

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Answer 4

Smart idea to get ahead of the problem, and there is a good upgrade for your Tracker boat trailer with a 3,500 lb axle. Since your current spring measures 26-1/4 inches from center of one spring eye to the center of your other spring eye, a 26 inch…

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Answer 5

Often an axle's weight rating will appear on a sticker or plate on the axle beam itself, or sometimes the trailer's main identification sticker will include axle ratings. This is helpful unless of course the axles have been replaced during…

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Answer 6

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 7

The OEM prep package consists of 4 "pucks" in the bed of the truck that will allow you to drop in puck style hitches for easy installation and removal, that gives you a completely clear bed when not in use. The B&W Companion OEM 5th…

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Answer 8

We have lift kits for trailer that easily add 2 inches to the height of the trailer. For that you'd want the part #RR23QX and you'd be set. I attached a picture that shows how it installs to give you an idea. This would be the easiest…

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Answer 9

You will have to go with a sliding hitch to allow the trailer to make tight turns. For a trailer 8 feet wide the only bed length that's going to allow 90 degree turns without a slider is a stationary hitch. That being said you have two options.…

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Answer 10

An underslung trailer coupler is one that attaches to the bottom of the trailer frame and an overslung one is one that attaches to the top of the frame. The Replacement Head for Blue Ox SwayPro Weight Distribution Systems part #BXW4011 is for…

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Answer 11

The difference between an load range C and load range D tire in the same size is the capacity and psi rating. The two tires will still have the same dimensions and fit on the same wheel. The D rated tire has a higher capacity. For a ST175/80D13 like…

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Answer 12

To find the load capacity for your axle you should look on the trailer VIN plate or sticker that lists the VIN number. The weight rating of the axle should be listed on that same plate or sticker. Also, the axle could have a tag or plate on it that…

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Determining The Correct Replacement Leaf Springs For Tandem Axle Trailer W/ Square Axles

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