I'm trying to build a shorty th350 from a 4x4 trans like the one pictured below with the ultra short tailshaft, does anyone know where I can get a tailshaft cover?



The cover that has a bearing and a yoke seal, but just to be clear this is different than a housing/extension. They are very common for Powerglides but can't find one for the th350 for the life of me.

The Ron Sessions book notes that a company called A-1 made them but A-1 no longer exists as best I can tell. I've tried TCI and Hughes with no luck.

I can post a photo of the similar cover for the Powerglide, or you can look at summit pn CLR-25031

thx

 

What good would having a 2WD extension housing do? The output shaft is still too short.

IOW, what are you REALLY trying to do?

 

You don't need speedometer gear provisions, nor overdrive?

You could take a regular extension to a TIG welding shoppe and have it made
and then pay more for a custom length driveshaft and spend more time adding a reluctor setup for speedometer.

Or just have the output swapped... Just saying.

 

Don't live up to your username. It's all about spending $100 to save $50!

 

as noted before I'm not looking for an extension housing, want to attach the yoke right to the existing shaft but I need a cover.

trying to make a shorty transmission, can't be much clearer than that.

 

nope

have what made? a cover?

not sure ya'all are clear on what a shorty trans is? don't want to swap the output, then it wouldn't be a shorty.

just looking for a source for a cover

 

maybe this will help - this is a photo of the cover for the powerglide, I'm looking for a source for the same thing for the th350:

 

I already saw that.

Is this going into an 82-up F-body?
Or, what is it going into? What is the rear axle?

 

custom install in an old hotrod flatbottom boat, not a third-gen car chassis. driveshaft and rearend choices don't really apply, it's hooked up to a vdrive via a custom driveshaft.

 

That makes more sense.
To get one that short...
If you can't find an old A-1 piece, your best bet might be to get a transfer case adapter (advance adapters has a ton; I'd dig around for used on eBay) and if your yoke is too small to match the seal / bushing dia. the adapter uses, sleeve it.

 

the A-1 piece was really what I was after but I ran into a total dead end on finding them, any idea if they have a web presence, or do you/anybody know of a phone number for them?

does the regular tailshaft extension housing have a bearing in it, or is it just a seal? any reason why I'd need a bearing for support with the short output shaft?

thanks for the info

 

In a car or truck with a slip or bolt-in yoke, the output is supported by the yoke being in a bushing. (Google a TH350 or 700-R4 tailhousing, it's obvious.) Without that bushing / yoke, the output has too much play. Then of course there is a seal to retain ATF from exiting (or reaching a transfer case.)