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1935-40 Ford Composite Leaf Spring Rear Suspension Kit

1935-40 Ford Composite Leaf Spring Rear Suspension Kit
1935-40 Ford Composite Leaf Spring Rear Suspension Kit
1935-40 Ford Composite Leaf Spring Rear Suspension Kit

Click image to enlarge

Please note the following about this product:

  • This item is sold as a kit.

Details

Reviews (2)

Q & A (2)

What's in the Box

Info

Give your 1935-40 fat-fendered Ford state-of-the-art ride and handling with the Speedway composite leaf rear suspension kit. Composite springs are the new wave of performance spring material. They are lighter than steel, respond faster, last up to 5 times longer, and will not rust or corrode like traditional leaf springs. The monoleaf design also ensures noise- and friction-free performance, while providing the softest, smoothest ride imaginable.

  • Monoleaf design is free of interleaf friction & squeaks
  • Springs will not corrode and are paintable
  • Stainless brackets can be polished
  • Brackets add much needed reinforcement to rear of frame
  • Spring rates matched to application
  • Smooth ride
  • Gas charged shocks

Kits include a pair of springs, stainless steel mounting brackets, gas-charged shock absorbers, and hardware. Order optional bolt-on rear sway bar 916-43500 for increased handling control.

910-49935 Instructions (PDF) 

Customer Reviews

Rated 3 out of 5 by 2 reviewers.
RATING BREAKDOWN
2 reviews
5 Stars
0
4 Stars
0
3 Stars
2
2 Stars
0
1 Star
0
RECOMMEND THIS PRODUCT:

Tinman70
Tampa, FL, USA

Easy to install but needs mods

September 09, 2014
I used this composite leaf spring kit from Speedway as part of a T5 5-speed conversion on my ??_39 Ford. The original banjo rear end was also used with the open driveshaft conversion. The kit is well made and easy to install. I did encounter some problems after completing the conversion. Because the composite spring is thinner that a normal steel spring pack, the kit includes lowering blocks to bring the ride height back to normal. There are also rubber blocks on both sides of the composite spring. The problem is with the lowering blocks. They are hollow in the middle and give very little contact area to the rubber block on the bottom of the lowering block and the spring pad welded to the axle on the top of the lowering block. The surface area on the lowering block is not a good match to the spring pad. After a short time, about 500 miles, the torque of the axle housing under load caused the rubber pad to completely deteriorate and the housing to move changing the pinion angle. There is also wear showing on the top of the lowering block because there is also very little contact with the spring pad (see picture). This is not a race car, the engine is a flathead V8 with less than 150 HP and the load is always conservative, no burnouts!. To fix the problem, I made steel plates out of .0625 flat stock and placed them on both the bottom and top of the lowering block. This gives it a full flat contact area against both the axle spring pad and the rubber pad against the composite spring. The rubber pads (upper only, lowers OK) were replaced with solid rubber Ford body mounts of the same size. Speedway should contact the vendor of the product and see if kit modifications are in order.
Pros:
  • Well designed
  • Easy To Install
Cons:
  • lowering blocks are a problem
Yes, I recommend this product.
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Was this review helpful? 0 0

Merchant Response:

Tinman70 - Thanks for your review. We appreciate hearing from you. Your review has been passed along to our Customer Service team to review the situation and our QC team to record and inspect the issue with this kit. We apologize for your frustration and are always happy to help.
Tinman70
Tampa, FL, USA

Easy to install but needs mods

September 09, 2014
I used this composite leaf spring kit from Speedway as part of a T5 5-speed conversion on my ????_39 Ford. The original banjo rear end was also used with the open driveshaft conversion. The kit is well made and easy to install. I did encounter some problems after completing the conversion. Because the composite spring is thinner that a normal steel spring pack, the kit includes lowering blocks to bring the ride height back to normal. There are also rubber blocks on both sides of the composite spring. The problem is with the lowering blocks. They are hollow in the middle and give very little contact area to the rubber block on the bottom of the lowering block and the spring pad welded to the axle on the top of the lowering block. The surface area on the lowering block is not a good match to the spring pad. After a short time, about 500 miles, the torque of the axle housing under load caused the rubber pad to completely deteriorate and the housing to move changing the pinion angle. There is also wear showing on the top of the lowering block because there is also very little contact with the spring pad (see picture). This is not a race car, the engine is a flathead V8 with less than 150 HP and the load is always conservative, no burnouts!. To fix the problem, I made steel plates out of .0625 flat stock and placed them on both the bottom and top of the lowering block. This gives it a full flat contact area against both the axle spring pad and the rubber pad against the composite spring. The rubber pads (upper only, lowers OK) were replaced with solid rubber Ford body mounts of the same size. Speedway should contact the vendor of the product and see if kit modifications are in order.
Pros:
  • Well designed
  • Easy To Install
Cons:
  • lowering blocks are a problem
Yes, I recommend this product.
Full Size Image

Was this review helpful? 0 0

Merchant Response:

Tinman70 - Thanks for your review. We appreciate hearing from you. Your review has been passed along to our Customer Service team to review the situation and our QC team to record and inspect the issue with this kit. We apologize for your frustration and are always happy to help.
Page 1 of 1

Product Q&A

2 questions : 2 answers

1 answers

How much does this kit change the ride height ?

Discdog
Rhode Island, USA
October 13, 2014

How much does this kit change the ride height ?

Answers

October 15, 2014
EricM
This kit lowers the 35-40 approximately 4” as compared to a set of new replacement springs. Kit contains 3” lowering blocks and these could be changed to a 4” or possibly only a 1” depending on preference in ride height.
1 answers

will this kit work with original torque tube banjo rear axle?

tim
atlanta,texas
November 17, 2011

will this kit work with original torque tube banjo rear axle?

Answers

November 18, 2011
John
Part number 91049935 This kit is for a 3” axle housing tube and can be altered or modified to work on most housing dimensions. It comes with 3” lowering blocks that may need to be changed to achieve alignment for the original torque tube. The kit is designed to lower the rear of the vehicle and it greatly improves the ride and handling.
Page 1 of 1

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