12 bolt irs value
Tech Contributor
Joined: Aug 1999
Posts: 15,175
Likes: 3,986
From: Connecticut, USA
That would be over 40 years old now, Tom redesigned the parts over those years. He had Richmond make the gears to size instead of machining a stock 12 bolt set, the axles were different and the present ones I think are better. Then the question comes to mind what abuse they were subjected to over that time. If these are sitting on a shelf and never been installed you would get a good value but if they were run hard I wouldn't expect a lot when Jo Watt has new ready to install. You can't compare those to present day parts for pricing.
Race Director
Joined: Jan 2000
Posts: 13,018
Likes: 2,262
From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
C2 of Year Winner (performance mods) 2019
2017 C2 of Year Finalist
Got any pics? What gears are in it? Posi? U-joint size? I think Pepe was doing some gear treatments way back when to help.
It's certainly got some value...let us see what it looks like....
JIM
It's certainly got some value...let us see what it looks like....
JIM
Tech Contributor
Joined: Aug 1999
Posts: 15,175
Likes: 3,986
From: Connecticut, USA
Value depends on condition and demand. Throwing out numbers without seeing and inspecting an old custom diff would be foolish. An all new 12 bolt will cost a lot, the parts are different though and importantly the process used to build them vary from builder to builder- some good, some not so good. Some true, some all talk.
I think anyone who would be interested, that knows about these, would want to see it before offering you anything.
I think anyone who would be interested, that knows about these, would want to see it before offering you anything.
Race Director
Joined: Jan 2000
Posts: 13,018
Likes: 2,262
From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
C2 of Year Winner (performance mods) 2019
2017 C2 of Year Finalist
Sounds like it had the good stuff at the time. As mentioned...depends on what abuse it may have had...but the shafts and u-joints won't be hurt.
With a complete "new style" 12 bolt 1480 conversion eating up $5500-$6000 at least...you can go from there. Sounds like a $2500-$3K or so range at best maybe? Just guessing without pics and details.
JIM
With a complete "new style" 12 bolt 1480 conversion eating up $5500-$6000 at least...you can go from there. Sounds like a $2500-$3K or so range at best maybe? Just guessing without pics and details.
JIM
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
Burning Brakes
Joined: Nov 2011
Posts: 1,170
Likes: 201
From: Willoughby Ohio
Sounds like it had the good stuff at the time. As mentioned...depends on what abuse it may have had...but the shafts and u-joints won't be hurt.
With a complete "new style" 12 bolt 1480 conversion eating up $5500-$6000 at least...you can go from there. Sounds like a $2500-$3K or so range at best maybe? Just guessing without pics and details.
JIM
With a complete "new style" 12 bolt 1480 conversion eating up $5500-$6000 at least...you can go from there. Sounds like a $2500-$3K or so range at best maybe? Just guessing without pics and details.
JIM
