The Ford Barn

Brian · 09-19-2021, 02:40 PM

In attempting to assist a friend building a 39 coupe, he has two rear springs to replace the one that came out from under the car that has broken leaves. The spring removed from the car, unladen, measures 42 " outside to outside, and placing a straight edge under each end and measuring to the centre bolt is 10 1/2"
Both the possible replacement springs are genuine Ford as evidenced by the grooved and tapered leaves. One measures 41 1/2" x 10 3/8" so is close to what we removed.
The other spring measures 40 1/2" x 7 1/2" - considerably smaller. What would it possibly be out of?

Kube · 09-19-2021, 02:43 PM

Brian, Un-sprung springs really can't be defined by the measurements you'd observed. Rather, the springs are measured under a specific load.
That being said, how many leaves are in each that you are considering using?

19Fordy · 09-19-2021, 03:28 PM

Look at the top leaf of each spring. There should be a part # stamped in the top spring.
My 40 springs are numbered.

Rodrelic · 09-19-2021, 05:56 PM

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Somewhere there is data I had maybe from van pelts, width & leingths, and trucks were different by 2 more leaves, maybe 60 hp 1 less. There is a page out there somewhere.

09-19-2021, 02:40 PM	#1
Brian Senior Member Join Date: May 2010 Location: Masterton, New Zealand Posts: 3,829	39 rear spring In attempting to assist a friend building a 39 coupe, he has two rear springs to replace the one that came out from under the car that has broken leaves. The spring removed from the car, unladen, measures 42 " outside to outside, and placing a straight edge under each end and measuring to the centre bolt is 10 1/2" Both the possible replacement springs are genuine Ford as evidenced by the grooved and tapered leaves. One measures 41 1/2" x 10 3/8" so is close to what we removed. The other spring measures 40 1/2" x 7 1/2" - considerably smaller. What would it possibly be out of? __________________ Unfortunately, two half wits don't make a whole wit!

09-19-2021, 02:43 PM	#2
Kube Senior Member Join Date: May 2010 Location: Wisconsin, USA Posts: 8,990	Re: 39 rear spring Brian, Un-sprung springs really can't be defined by the measurements you'd observed. Rather, the springs are measured under a specific load. That being said, how many leaves are in each that you are considering using? __________________ "I can explain it for you. However, I can't understand it for you".

09-19-2021, 03:28 PM	#3
19Fordy Senior Member Join Date: May 2010 Location: Coral Springs FL Posts: 10,925	Re: 39 rear spring Look at the top leaf of each spring. There should be a part # stamped in the top spring. My 40 springs are numbered. Last edited by 19Fordy; 09-19-2021 at 09:51 PM.

09-19-2021, 05:56 PM	#4
Rodrelic Senior Member Join Date: Mar 2018 Location: Florida panhandle Posts: 194	Re: 39 rear spring Sponsored Links (Register now to hide all advertisements) Somewhere there is data I had maybe from van pelts, width & leingths, and trucks were different by 2 more leaves, maybe 60 hp 1 less. There is a page out there somewhere.