Speedo Cable Tranny Fluid Leak
Thread Starter
8th Gear
Joined: Feb 2008
Posts: 8
Likes: 0
Speedo Cable Tranny Fluid Leak
While removing the speedo cable on my 81 Auto tranny to replace the “O” ring seal on the speedo driven gear, I removed the retainer bold then tried to unscrew the cable (big mistake, should have done the cable first.) The driven gear popped out still attached to the cable. I cannot find the retainer. Does anyone know what it looks like or where I could get one? It sure would help to know what I’m looking for.
Last edited by rodb; May 9, 2008 at 08:45 AM. Reason: Add year and transmission type
Le Mans Master
Joined: Oct 2006
Posts: 7,123
Likes: 433
From: Gladstone MO
C3 of Year Finalist (appearance mods) 2019
There is nothing that holds the driven gear in the adapter. It just slips in. There is a small seal in the cable end of the adapter that's help in with a small round wire retainer. IT goes around the shaft of the driven gear.
Race Director
Joined: Sep 2001
Posts: 10,560
Likes: 439
From: Wellington, FL
St. Jude Donor '11 thru '25
There is just the speedo assembly retainer, that bolts to the tranny, that holds the cable assembly and gear in place. Mine seems to always leaked some but a put a hair bigger o-ring in last time which seems to have helped. 
Race Director
Joined: Sep 2001
Posts: 10,560
Likes: 439
From: Wellington, FL
St. Jude Donor '11 thru '25
It's a sort of "Y" shaped clamp that's about an inch or so long. One end has a hole in it for the bolt to go thru that attaches to the tranny and the other end is the Y portion which goes around the assembly to hold it in place.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Racer
Joined: Jan 2007
Posts: 385
Likes: 3
From: RTP NC
While removing the speedo cable on my 81 Auto tranny to replace the “O” ring seal on the speedo driven gear, I removed the retainer bold then tried to unscrew the cable (big mistake, should have done the cable first.) The driven gear popped out still attached to the cable. I cannot find the retainer. Does anyone know what it looks like or where I could get one? It sure would help to know what I’m looking for.
http://s189.photobucket.com/albums/z...20replacement/
Le Mans Master
Joined: Apr 2001
Posts: 5,000
Likes: 1
From: Minneapolis, Mn USA
Mine is now leaking after I replaced the speedo cable (700R4). Same type set-up.
Question is: does replacing just the O-ring usually help, or does it also leak from the shaft bushing area, meaning you have to replace the entire assembly ($70 assembly vs $0.50 O-ring).
Appreciate any experience on that one.
Brent....
Question is: does replacing just the O-ring usually help, or does it also leak from the shaft bushing area, meaning you have to replace the entire assembly ($70 assembly vs $0.50 O-ring).
Appreciate any experience on that one.
Brent....
Race Director
Joined: Sep 2001
Posts: 10,560
Likes: 439
From: Wellington, FL
St. Jude Donor '11 thru '25
Mine is now leaking after I replaced the speedo cable (700R4). Same type set-up.
Question is: does replacing just the O-ring usually help, or does it also leak from the shaft bushing area, meaning you have to replace the entire assembly ($70 assembly vs $0.50 O-ring).
Appreciate any experience on that one.
Brent....
Question is: does replacing just the O-ring usually help, or does it also leak from the shaft bushing area, meaning you have to replace the entire assembly ($70 assembly vs $0.50 O-ring).
Appreciate any experience on that one.
Brent....
