Rear Ujoint Alternative

AA Ford Discussion Group relating to the repair and restoration of your AA Ford.
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Posts: 60
Joined: March 21st, 2016, 5:21 am
Body Type: Firetruck
Model Year: 1928
Location: Hudson, NY

Rear Ujoint Alternative

Post by emf » July 22nd, 2017, 7:59 am

I was lurking on ebay the other day and discovered that a ujoint for a 35 - 39 Ford 3/4 and 1 ton truck has 6 spline front and 10 spline rear holes that are about the same. I say about, because when I asked the seller to measure the spine diameters, they responded with numbers very close to what i measured on my AA rear ujoint. Has anyone ever looked into the use of these other ujoints as alternatives??


Bob C
Posts: 1149
Joined: April 24th, 2003, 11:50 am
Body Type: Mail truck, Stake tr
Model Year: 1931
Location: SO CAL

Re: Rear Ujoint Alternative

Post by Bob C » July 22nd, 2017, 11:16 am

I found two on ebay. 38-39 1 ton with 3-speed and 35-39 with 4-speed. I don't think they would work.
Your rear u-joint should be about 4 1/2" long and I measured one like the 4-speed one and it is 5 3/4" long.
Also the 1.5 ton trucks went to 1 3/8" drive shaft in 1932, not sure about the one ton.


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