Put In New Aod- Drive Shaft Yoke Won't Slide In All The Way?

[Michael West]

I bought a replacement aod transmission from a guy off Craig's list to replace mine that needs a rebuild. I just got it all bolted up to the motor and went to install the drive shaft, and the yoke won't slide all the way in to the tail of the transmission. There's probably a good two inches left of the yoke and this is causing my drive shaft to be too long to bolt up to the rear end. I slid it into the old tranny and it slid right in all the way.

What is my problem? And what can I do to get this thing to work?

 

[OldManRiver]

I would have to guess the splines are twisted,not uncommon.
I am leery of buying anything off of Craigslist since you have to recourse when a sale goes south.

 

[Michael West]

I would have to guess the splines are twisted,not uncommon.
I am leery of buying anything off of Craigslist since you have to recourse when a sale goes south.

And in this case what can I do?

 

[Michael West]

Also , my drive shaft slides in about 3/4 the way just fine and then it just stops. Almost like there's no more room for it to go any further

 

[mikestang63]

Take the yoke off your original driveshaft or order a replacement and swap it out,

 

[Michael West]

Ok so after some research - my new tranny is out of a 85 town car. From what I've read, the output shaft Is 1 inch longer, which makes sense as to why my drive shaft is sticking out so much. So if I were to just have my drive shaft shortened an inch would this take care of my problem? It would still leave the exposed yoke , but that slides in and out while driving anyways, right?

 

[mikestang63]

wouldn't it be easier to have a machine shop cut down the yoke to size vs. the driveshaft

 

[Michael West]

Okay I see what you're saying. My uncle told me I could also buy a driveshaft yoke off of ebay made for the town car which should be shorter. Would this also work?

 

[Gearbanger 101]

Assuming the U-joints were the same size. Does the CV driveshaft has the balancer on the yolk as well? If not, you might pick up a little driveline vibration?

Barring that, I'm with Mike though....I'd just shorten the end of your stock yolk the required amount. I would absolutely NOT cut the driveshaft.

 

[Michael West]

Ok - gonna just cut the yoke. Maybe a dumb question , and I'm sure the best choice is to take it to a machine shop, but could I just use my dremel to shorten it an inch?

 

[mikestang63]

Dremel? You realize that is a steel yoke..

Take it to a machine shop and do it right or buy the right yoke. You want to maintain at least 3/4" of clearance from the tail shaft of the trans to the back of the yoke.

 

[liljoe07]

Ok - gonna just cut the yoke. Maybe a dumb question , and I'm sure the best choice is to take it to a machine shop, but could I just use my dremel to shorten it an inch?

Are you sure the yoke is hitting something inside transmission on the tailshaft? I would be sure its not the tailshaft bottoming out inside the yoke before I would cut it.