Flywheel / Propshaft Coupling
Thread Starter
Instructor
Joined: Jan 2011
Posts: 101
Likes: 4
From: Katy Texas
Flywheel / Propshaft Coupling
I have a simple question... Hope I can get some decent replies... Has anybody out there had any luck using the stock splined prop shaft coupling (clamp type) with an automatic transmission in your modded Corvette and how much power are you making? I'm curious to know what are the actual HP limits the factory stock coupler can handle.
Supporting Vendor
Joined: Feb 2011
Posts: 3,526
Likes: 885
2024 C6 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (track prepared)
2019 C6 of Year Winner (track prepared)
I have a simple question... Hope I can get some decent replies... Has anybody out there had any luck using the stock splined prop shaft coupling (clamp type) with an automatic transmission in your modded Corvette and how much power are you making? I'm curious to know what are the actual HP limits the factory stock coupler can handle.
I've only ever had one issue with the stock setup, although it wasn't from the coupler itself. One time when I was doing an engine swap I noticed that the flexplate portion developed some hairline cracks which for all I know could have been there for months. Other than that I've never had a problem which is very surprising given how hard the car launches (my 60ft times are in the low to mid 1.3s).
Hope that helps,
Christopher
Thread Starter
Instructor
Joined: Jan 2011
Posts: 101
Likes: 4
From: Katy Texas
Chris,
Thanks for the excellent information and yes it is helpful. Your car looks great and leaves hard! What did the crankshaft thrust bearing look like in your old engine when you disassembled it? Just wondering if it showed any signs of excessive thrust damage.
Thanks for the excellent information and yes it is helpful. Your car looks great and leaves hard! What did the crankshaft thrust bearing look like in your old engine when you disassembled it? Just wondering if it showed any signs of excessive thrust damage.
Supporting Vendor
Joined: Feb 2011
Posts: 3,526
Likes: 885
2024 C6 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (track prepared)
2019 C6 of Year Winner (track prepared)
Nope, never had a problem with that either. And this is in two almost identical cars as my other race car that got stolen in 2015 was set up the same way. I ran 9.950 with that one.
Thread Starter
Instructor
Joined: Jan 2011
Posts: 101
Likes: 4
From: Katy Texas
I've been searching the web for an information / image / photograph or P/N of the coupling that GM uses in the C7 Z06 or ZR1 with an automatic trans? Anybody have a photo or information they can share?
Supporting Vendor
Joined: Feb 2011
Posts: 3,526
Likes: 885
2024 C6 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (track prepared)
2019 C6 of Year Winner (track prepared)
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
Thread Starter
Instructor
Joined: Jan 2011
Posts: 101
Likes: 4
From: Katy Texas
Can anyone confirm the C7 Z06 and ZR1 with A8 are using the same split / splined coupling yoke at the flywheel to drive the prop shaft as the base C6 & C7 cars? I've fond some bits and pieces of information but no hard evidence just yet. Seems like GM would have upgraded the coupling for reliability with higher power. Anybody know or have some information to share?
Thanks
Thanks