help with a TH350
 

A few weeks ago I bought a 77 Silverado. Great truck, needed some minor stuff. Got a TH350 in it. Good trans but it was leaking all over the place and shifting hard. I replaced the modulator (wrong one was on the truck), filter, fluid, pan gasket, and swapped out the leaky rear seal. Shifts great now.

I had a hard time getting the new seal in and ending up getting a little more forceful with it than I would have wanted too. It still leaks, more than before actually. I have bought another seal and am about to head out to mess with that. This time when the guy at Autozone asked if I wanted just the seal or the one with the bushing, I said I'll take the bushing.

My two questions are:
1) Any tricks for getting the seal in smoothly?
2) Where does this bushing go? This isn't my area of expertise so don't rib me too bad haha! Its like an 1.5 inch round 1.5 inch long tube with grooves in it........

Re: help with a TH350
 

The bushing goes into the housing first and then the seal. If you have the correct driver for the seal and bushing it goes pretty easy. The old bushing and seal must be removed first and there is a special puller made for the removal of the bushing.

Jim

Re: help with a TH350
 

Thanks for the help so far. I got the truck lifted up and started inspecting things and now I am not sure its the seal that is leaking. Is it possible for fluid to be leaking from the speedo cable?

Re: help with a TH350
 

Yes.

Re: help with a TH350
 

That's where mine is leaking from, it's the O-ring I need replacing I think.



Story of my life!

Re: help with a TH350
 

I'm pretty sure thats my culprit then. I will probably just pull the tailshaft off and replace all seals involved, And the speedo cable, it feels loose and won't tighten up and its about 10 mph off

Re: help with a TH350
 

http://i408.photobucket.com/albums/p...k/DSC02384.jpg
That's where mine is leaking. Take off that nut and it's like a little bullet, check the o-ring. It houses some gears which you can replace to slow down your speedo...

Re: help with a TH350
 

Not saying that's what it is, but it's worth looking at.

Re: help with a TH350
 

Take the tail-housing to a local trans shop,they have the correct tools to install the bushing and seal. It's an easy job, should be fairly cheap if you buy the seal and bushing from them and they will also have the two seals for the speedo adaptor and the square cut O-ring that goes between the case and the tail.

Good luck
Bill