My trans has a new rear seal that leaks. The previous trans had a new rear seal that leaked. It seems to leak while driving, not sitting. I am beginning to think the problem is the yoke (150k miles). Does anybody make a sleeve that fits over a yoke like they have for balancers?

Thanks.

On some transmissions they have a "Welch plug" on the Yoke. It has a weep hole for letting air out. If this is in wrong it will be showing signs of a slow leak. Check the yoke to see if it has a leak first before you want to sleave it.

http://www.73-87.com/7387garage/drivetrain/yokeleak/yoke.jpg


Also curious what transmission are you using? what spline count does your yoke have? Is this a collection of drive line parts or original equipment to the car?

It's the original yoke that was with the powerglide (27 spline?) now with a Saginaw 4 spd.

Your sagnaw takes a 5" 27 spline yoke. Which can use the PG 27 spline yoke back and forth. So the big question is where is your leak, the shaft from wear or the weep hole in the yoke?

http://www.dennysdriveshaft.com/app/webroot/files/Slip%20yoke%20drawing%202(4).jpg

Is it leaking from the seal or the yoke?

can you take the yoke out and measure the shaft for consistency in size?

if you need to replace it due to wear.

a good source for replacement.
dennys driveshaft (http://www.dennysdriveshaft.com/c26_camaro.html)

Are there any wear marks, groves on your yoke, Does it wobble in the trans, if so,
you may need a new yoke, rear bushing, and seal.

Good questions all. It's out of the car but I'll have to take a look at it next time I'm in the garage. I didn't know about the weep hole. I believe it is leaking at the seal.

Are sleeves available to cover grooves on the yoke?

The money you will spend on a sleeve to fit perfectly you would be better off getting a new one. Due to the fact you are using smooth steel with a sealer to cover grooves in your original yoke shaft.Not to mention a change in the rear seals that the shaft will be pressing outward on due to the difference in the stock yoke and the sleeved yoke. If you have your stock yoke turned then sleeved or have a sleeve pressed over the stock sleeve and no turning of the steel yoke.
Its up to you, most wont see the new yoke anyway but you will save a transmission from burning up.

just a thought.

I'm looking for the most direct solution. I don't recall seeing grooves on the yoke last time I looked, but with 150k on it I'd better look again.
I 've used sleeves on balancers and they are cheap so that's where I was coming from.

a sleeve can't fit into the trans bushing. if it wobbles get a bushing also.

Had the tailshaft bushing replaced in my Saginaw over the winter it was eating the rear seals before replacement,local shop did it for under $100,new yokes don't cost that much especially after you look at the messing around that your going to do to repair the old one.