39 Ford 1/2 Ton
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39 Ford 1/2 Ton
Could anyone tell me what diff in a 9 inch will bolt into a 39 1/2 ton? Also what is necessary in completeing this job, thanks in advance.
Last edited by 5 Star; Sep 28, 2005 at 10:38 AM. Reason: Grammer mistake
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From: Foley, MN
None, I do believe.
I believe 39s still had transverse leaf springs, and although I don't know what year Ford started using 9" rear ends, I bet it was long past the point where they eliminated transverse leafs. So, there isn't a 9" rear that will BOLT in without modification, unless someone has an aftermarket replacement...
And then you would need a custom driveshaft to replace the torque tube/driveshaft combination, which might be interesting to get a modern Spicer-style yoke to fit the output splines of the (3-speed?) transmission.
That's a start. Good luck. You have quite a bit of fabrication ahead of you.
-Dave
And then you would need a custom driveshaft to replace the torque tube/driveshaft combination, which might be interesting to get a modern Spicer-style yoke to fit the output splines of the (3-speed?) transmission.
That's a start. Good luck. You have quite a bit of fabrication ahead of you.
-Dave
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From: Orange County, CA
If the stock drivetrain is in place, you will have to convert to an open drive system. There are places that sell the needed parts in kit form, or you could scrounge up the parts and make it yourself. Like mentioned, you would have a single tranverse spring, so first order of business would be to convert to paralellel spring (first came into use on 1/2 tons in '42). Again, you can buy a kit that has the parts needed, or make it up yourself. Installing a 9 inch (first used in '57) won't be a direct bolt in if your truck is all stock, but it can be done.
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From: Canada
9 inch diff into 39
Thanks guys for the info I took a look at what the job would take, and decided to look maybe for a 3.78, or a 3.54 conversion instead.
Thanks again for the info, been a big help.
Thanks again for the info, been a big help.
