Tranny seals

[51GMC]

I'm looking the rear seal for a 1951 GMC 3 Speed transmisson. Several place have the gaskets but I'm not having any luck with the seals.

Any idea where? Also would like sync's but I can get by with the ones I have.

 

[vwnate1]

Is this the side loader tranny with Torque Tube ? .

Last thing I knew , Fel-Pro still made gakset sets for these , synthetic rings insteread of the good leather ones but what the hey.

-Nate

 

[51GMC]

Hay Nate,

Yes it is the torque tube driveshaft.(not looking forward to dropping the tranny, but gotta be done. I'm getting to old to be crawling around under these things.)

Your saying that the seal at the rear shaft is leather?

I'll give Fel Pro a call when they get up and see what they have.

Thanks,

 

[vwnate1]

Well ;

there _isn't_ any rear shaft seal , the ball has a large o-ring where it fits against the retaining plate and then there's the paper gakset / shims use to properly adjust the tension of the ball into the back of the tranny ~ it's pretty simple if time consuming , you must polish out all the ridges hammered into the ball with 1,000 grit (or finer) then test fit it , sans o-ring and add shims (the paper gaskets) under the retaining plate untill the ball is snug but will move with a light pull .

Then take at all apart again and install the u-joint and ball etc. .

NOTE : it is SUPPOSED to drip a little bit from the ball ! they dripped when new . finding and usiing a leather o-ring (leather shop ?) reduces this greatly over the synthetic o-rings now provided

There are supposed to be leather washers in the threaded cap at the rear end of the ball piece too , these clamp and prevent drips out there .

I hope this helps , IIRC it's all covered in detail in the factory shop manual , they're only $29.00 or so from Chevy Duty...


-Nate