Mrg part date for transmission case?

[pklarkin]

Hi All,

I'm in the middle of rebuilding the transmission and I can't seem to get the bearing for the main shaft to fit into the housing correctly - it sticks out too far by about 1/16th of an inch so that when I try to mount the bearing retainer the two aren't flush.

The housing I'm using is not original to the car. It doesn't have a groove for the snap ring in the main shaft bearing hole. I'm wondering if I have a housing from pre-Sept'29. If so, do I just skip the snap ring outright? Is there another part I should be using instead? I'm hoping there's a way to date the housing itself to tell if I should be using the snap ring or not. Thanks in advance for your help!

 

[wrndln]

There 5 styles of transmission cases. There are cases that have a machined bearing stop for the front and rear ball bearings. These were the first cases used in model A's. The later style cases use a snap ring in the machined grooves. If I remember correctly, the bearings do stick out a little bit, but the bearing retainers should fit using the required gaskets. I suppose the bearings you have could be a little too thick. I saw that on a rearend I was helping rebuild a few months ago. The bearings are the same for all the cases.
Rusty Nelson

 

[Tom Wesenberg]

Also watch for the two different size oil slingers that fit against the insides of the two case bearings. These differences are described in the SERVICE BULLETINS.