76 automatic not shifting
Thread Starter
Racer
Joined: Nov 2003
Posts: 353
Likes: 1
From: Sugar Land, TX
76 automatic not shifting
Just had the heads off for valve job. After reassembling engine the transmission will not shift out of first gear and actually sounds like it is slipping in first. All was okay before valve job. Any thoughts as to why it isn't shifting now?
Pro
Joined: Oct 2004
Posts: 663
Likes: 0
From: Honolulu Hawaii
Originally Posted by original76
Just had the heads off for valve job. After reassembling engine the transmission will not shift out of first gear and actually sounds like it is slipping in first. All was okay before valve job. Any thoughts as to why it isn't shifting now?
Burning Brakes
Joined: Aug 2005
Posts: 1,126
Likes: 0
From: Hudson Falls, N.Y. 76 Vette Modified L-48
There's also a shift rod connected to the throttle linkage that connects to the transmission that might have been overlooked...I think they call it a TV..check that too..
Melting Slicks
Joined: May 2002
Posts: 2,431
Likes: 52
From: Florida
I agree with vacuum line being the problem. It will seem as though it's slipping when they don't shift. Vacuum should have been connected to tee fitting on intake behind carb. Should be idleing rough if a vacuum leak exists.
Jim
Jim
Thread Starter
Racer
Joined: Nov 2003
Posts: 353
Likes: 1
From: Sugar Land, TX
Thanks for the help. I knew the vacuum line at the intake was connected. How the line got disconnected at the module is anybodys guess. Reconnected with new tubing and shifting great! Will the tranny go another 183000 miles before rebuild?
Drifting
Joined: Sep 2004
Posts: 1,532
Likes: 4
From: Fairview Heights Illinois, near Saint Louis MO, STL C3 Shark
Originally Posted by original76
Thanks for the help. I knew the vacuum line at the intake was connected. How the line got disconnected at the module is anybodys guess. Reconnected with new tubing and shifting great! Will the tranny go another 183000 miles before rebuild?
Sure it can, just keep fluid in it (cause it likely leaks all the time) and keep changing filters. The TH350C that was in my 68 chevy truck(came from an el camino) had so many miles on it I lost track. A couple of times Id need to put that auto tranny de-glazing stuff in, but then she'd run great for another couple of years. and no, I did not drive it like my grandma....
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