What is The Difference Between Having Trailer Axles Above or Below the Leaf Springs

Question

Question:

Does it matter if i mount the springs on top of the axle vs under. If not what is the difference in in function and safety

asked by: Trent

1

Helpful Expert Reply:

You can mount trailer axles above or below the leaf springs. The difference is just the amount of ground clearance that the trailer would end up having.

The biggest advantage with the spring below the axle (trailer will be lower) is that you would have a lower center of gravity.

The spring seats will need to be on the right side of the axle though when you go to install the new springs. Trailer axles have an arc to them so you can't just flip them over otherwise you would end up with terrible camber.

We do sell kits to move the axle above or below the springs.

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.

expert reply by: Jameson C

1

Answer 1

We do a couple replacement shear springs available for you that may work depending on what you're needing. For instance, we do carry the Replacement #75 Rubber Shear Spring for MORryde Trailer and RV Suspension Systems #MR96UR, which will…

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Answer 2

You can use leaf springs that are rated higher than the axle without any issues as long as they measure the correct measurement for your trailer. For example the 6-leaf double eye spring for 7,000 lb axles part #e64SR measures 24-7/8" eye…

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Answer 3

You could upgrade your axles to a higher capacity, however it isn't really recommended since it can create a rougher ride. Since you've got 3,500 lb axles I'd stick with those and upgrade your suspension with the SumoSprings…

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Answer 4

Trailer leaf springs are traditionally mounted under the axle. To mount them on top of the axle, you need to use an over-under kit to allow you to put spring seats on top of your axle. If you already have the spring seats mounted on top and bottom,…

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Answer 5

Based on the weight information you provided, you'll want to go with a 3,700lb slipper spring, though you need to figure out the length of your current spring first. It's never a great idea to have a spring that's right at the max, as…

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Answer 6

To correctly measure a leaf spring, you'll want to jack the trailer up on jack stands so the axle is hanging freely, then measure directly across from the center of one spring eye to the other, as shown in the provided diagram. The height of the…

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Answer 7

Increasing the tire and wheel size can increase the height of the trailer but it's usually quite minimal. Before you do anything else you should see if the pin box can be adjusted. Although you have to be careful here since This will lower the…

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Answer 8

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 9

Yes, there is a front mounted hitch for your 2022 Ford F-350 dually with a diesel engine. It is the EcoHitch Hidden Front Mount Trailer Hitch Receiver item #EH83GR. This hitch is custom fit and bolts to your Ford with included hardware. This front…

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Answer 10

For your 2022 Ford F-350 Super Duty dually you will need the EcoHitch Hidden Front Mount Trailer Hitch Receiver #EH83GR. The Receiver #306-X7904 will only fit on single rear wheel models of the F-350. At this time we do not have an installation video…

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Answer 11

At one point the EcoHitch front hitch part #306-X7904 did not fit the diesel versions of the 2019 Ford F-350 but they redesigned it so that it could. So this will fit your diesel engine 2019 Ford F-350.

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Answer 12

Thanks for the picture! The spring shouldn't hit the frame like yours does in the picture, so the correct solution would be to either add a longer front hanger or using a shorter spring. The correct replacement hanger will be dependent on the…

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What is The Difference Between Having Trailer Axles Above or Below the Leaf Springs

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