Transmission leak help please
Thread Starter
Heel & Toe
Joined: Nov 2017
Posts: 19
Likes: 0
From: Georgia
Transmission leak help please
Found a transmission leak on my 1972 vette with v8 vin k so I replaced the pan seal thinking it was that but it looks as if it’s actually leaking around where the shifter bolt goes into the transmission. I’ve looked everywhere and can’t find the seal for it. Anyone know of where I can get this seal or a seal kit for this transmission. And how to actually replace this seal
thanks so much
thanks so much
Le Mans Master
Joined: Feb 1999
Posts: 8,351
Likes: 75
From: Tampa Bay FL
Found a transmission leak on my 1972 vette with v8 vin k so I replaced the pan seal thinking it was that but it looks as if it’s actually leaking around where the shifter bolt goes into the transmission. I’ve looked everywhere and can’t find the seal for it. Anyone know of where I can get this seal or a seal kit for this transmission. And how to actually replace this seal
thanks so much
thanks so much
TH350/TH400/700R4 selector shaft seal: https://www.ebay.com/i/271991372933?chn=ps
If you find a replacement seal does not solve the issue, it may be the 'selector shaft'. On my 700R4, the selector shaft wore to a point where the seal no longer was sufficient; I had to replace the selector shaft. You can remove/replace with the shaft in the car but it is a bit tedious.
Here is Summit P/N for the 700R4 selector shaft for $21.95: https://www.summitracing.com/parts/a...xoCMcYQAvD_BwE
Using "TH350 selector shaft", I found the following part on eBay: https://www.ebay.com/itm/New-TH350-C...!US!-1&vxp=mtr
Using "TH400 selector shaft", I found the following part on eBay: https://www.ebay.com/itm/TH-400-3L80...!US!-1&vxp=mtr
Last edited by TedH; Dec 2, 2017 at 11:10 AM.
Melting Slicks
Joined: May 2002
Posts: 2,431
Likes: 52
From: Florida
Found a transmission leak on my 1972 vette with v8 vin k so I replaced the pan seal thinking it was that but it looks as if it’s actually leaking around where the shifter bolt goes into the transmission. I’ve looked everywhere and can’t find the seal for it. Anyone know of where I can get this seal or a seal kit for this transmission. And how to actually replace this seal
thanks so much
thanks so much
Tool http://www.classictransmissionsoluti...SABEgLoofD_BwE
Seal http://www.classictransmissionsoluti...yABEgLlofD_BwE
Jim
PS You can use two seals to remedy worn shift shafts also. Install one after the other. Done it before.
Last edited by jimvette999; Dec 2, 2017 at 11:11 AM.
Burning Brakes
Joined: Jan 2001
Posts: 1,217
Likes: 442
From: Loir Valley Sarthe, France
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2024 C3 of the Year Finalist - Unmodified
2023 C3 of the Year Finalist - Unmodified
I had the same issue on the trans of my '78, I thought for ages it was the pan gasket until I was able to clean everything and check it each day.
I got hold of the seals from a friend over in CA, but didn't have any of the small "picks" that everyone else seems to have! I really struggled to pull out the old seal, bearing in mind the risk of scratching the shaft or the case. I ruined a couple of tiny screw-drivers! But, it came out cleanly.
I put some electrical tape around the shaft, to ensure a "smooth run" for the seal, which I'd greased a little.
I tapped the new seal down snug with a socket. Reconnected the shifter quadrant and hey presto, no leaks!
Apparently, on some transmissions, the casing is such that two seals could be out in on top of each other. Mine did not have that much clearance.
I got hold of the seals from a friend over in CA, but didn't have any of the small "picks" that everyone else seems to have! I really struggled to pull out the old seal, bearing in mind the risk of scratching the shaft or the case. I ruined a couple of tiny screw-drivers! But, it came out cleanly.
I put some electrical tape around the shaft, to ensure a "smooth run" for the seal, which I'd greased a little.
I tapped the new seal down snug with a socket. Reconnected the shifter quadrant and hey presto, no leaks!
Apparently, on some transmissions, the casing is such that two seals could be out in on top of each other. Mine did not have that much clearance.
