Thread: TH350, Where's the LEAK???

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Originally Posted by fiftee6

OK, so I took the tail of the trans. Got the speedo gear out, bought a new o-ring for the little bulllet that holds the speedo gear and cable, and while I was at it, pounded in a new rear seal. Now I have a nice, leak proof seal by the driveshaft and speedo cable. Took a test ride and I think I found it. Turns out
e kickdown cable, which appears to be a hard black plastic, cracked where the bolt goes through it to secure it. Probably overtightened it.
Any quick fix? Or, is replacing it a must???

if there is enough room put a bigger washer on the bolt.

Be careful not to tighten bolts too much on the housing or be prepaired to rethread the holes. Ran into a big problem with the kickdown cable on mine. Just speaking from experience. To install a cable with the trans under the car can be a bit tricky. Just depends on houw much room you have between firewall and top of trans. Please do not force anything to match up. Just take it easy and be sure you are straight on the threads.

Do you know how to adjust the cable once its installed??

The seal on the kickdown cable is shot. It has the rubber top hat type, not the o-ring. It is cracked and dry rotted. Does anyone know if you can get this piece without buying the whole cable? GM part number maybe?

Originally Posted by fiftee6

The seal on the kickdown cable is shot. It has the rubber top hat type, not the o-ring. It is cracked and dry rotted. Does anyone know if you can get this piece without buying the whole cable? GM part number maybe?

might try the chev. dealer

Mission acomplished! No go at Chev dealers. No one had it, would have to order it. And, they werent even shure if it would be right. Went to Aamco trans shop locally, met a great owner/operater (shocking) who gave me one for free! Turns out he has a classic mg. Got home put it in, made it to Friday night cruise night, and walla---NO LEAK! Life is good again...

I've had that problem. I bought a truck and couldn't find the trans leak and it turned out to be the kickdown cable being broken right at the base and it would only leak every once in a while. I went to Federated Auto Parts and got a new one for like 13 dollars. Easy quick fix.

Originally Posted by fiftee6

Mission acomplished! No go at Chev dealers. No one had it, would have to order it. And, they werent even shure if it would be right. Went to Aamco trans shop locally, met a great owner/operater (shocking) who gave me one for free! Turns out he has a classic mg. Got home put it in, made it to Friday night cruise night, and walla---NO LEAK! Life is good again...

thats great!

get some ultraviolet trans dye and a blacklight bulb - put the dye into the trans and run it for awhile, ck underneath with the blacklight and your leak will show up bright yellow. we use this method at the dealership with hard to find leaks, works every time.