Which Transmission???
Thread Starter
Advanced
Joined: Nov 2010
Posts: 76
Likes: 0
From: Arlington MA
Which Transmission???
I am just throwin' this out there. I have a 75 coupe with a crate 350/300 and a four speed. It has a super T-10 2.64 first gear with a 3:08? rear. The T-10 in the car is popping out of second which means rebuild time. I picked up a Muncie M-20 wide ratio from a 74 cheap and I am wondering what I should do. Should I pull the T-10 and rebuild it or rebuild the M-20 and put that in the car. Will my brand new Hurst shifter work with the M-20. Opinions are what I am looking for and don't worry about hurting my feelings. Thanks!
Le Mans Master
Joined: Apr 2007
Posts: 7,353
Likes: 72
From: Graceland in a Not Correctly Restored Stingray
Your first gear will be about 5% taller, but I'd go with the Muncie if you feel you have enough reserve bottom-end torque to make up for it. Nothing against the BW, but IMOE I just like Muncies better. The shifter should work with either transmission. Of course, replacing a 3.08:1 with a 3.55:1 FDR would wake that thing up a bit more.
Last edited by TheSkunkWorks; Mar 2, 2011 at 12:05 PM.
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,116
From: Crossville TN
You may be 'popping out of gear' because the linkage arms, bushings, and/or the shift mechanism in the shifter is worn/damaged. There may be no problem with the tranny at all. Evaluate this before you dive into the "money pit".
Le Mans Master
Joined: Jan 2006
Posts: 6,504
Likes: 139
From: Butler Pa
Thread Starter
Advanced
Joined: Nov 2010
Posts: 76
Likes: 0
From: Arlington MA
The linkage is adjusted properly, but thanks for the thoughts. I can rebuild either of them myself so the money pit thing should be easier to avoid. The motor has 385 ft.lbs. according to the GM spec sheet. anyone else want to weigh in?
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
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
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
Drifting
Joined: Sep 2010
Posts: 1,412
Likes: 50
From: Laguna Niguel California
Yes, the BW's will pop out of gear if they're getting worn. I recently had my S-T10 rebuilt and used torque-lock syncros, now no problem popping out of any gear. More importantly, check the condition of the gears before you decide about rebuilding. Synchros are relatively cheap but if you have to start buying replacement gears they are expensive.
Le Mans Master
Joined: May 2006
Posts: 9,993
Likes: 1,136
From: League City Tx
Keep the ST10 and rebuild it. Better 1st gear ratio and handles more power then the M20/M21. Not to mention you already have a new shifter. If you think you may want overdrive in the future, now is the time to upgrade.