rear end gears
Thread Starter
Instructor
Joined: Jun 2006
Posts: 164
Likes: 0
From: tullahoma tn
rear end gears
what if any is the best way to get the rear end gear size with out pulling the cover off the rear end. if i have something smaller than a 307 i am going to change it. i am thinking it is a round a 2:56 but have not pulled the cover to know for shur it is a 1990 non zr1 
Le Mans Master
Joined: Dec 2004
Posts: 5,488
Likes: 1,352
What does it tach at 80mph. A 2.59 will tach at 2000 rpm.
Jack it up get both rear tires off the ground and mark the driveshaft and spin the rear wheels by hand. Count the turns of the driveshaft. Or the easier way get the Rpo codes off the inside of your console door. Here are the codes
GM1= 2.59
GM3= 3.45
GT7= 3.33
GU2= 2.73
G44= 3.07
Jack it up get both rear tires off the ground and mark the driveshaft and spin the rear wheels by hand. Count the turns of the driveshaft. Or the easier way get the Rpo codes off the inside of your console door. Here are the codes
GM1= 2.59
GM3= 3.45
GT7= 3.33
GU2= 2.73
G44= 3.07
Last edited by JD'S WHITE 93; Aug 13, 2006 at 12:52 AM.
Le Mans Master
Joined: Dec 2004
Posts: 5,488
Likes: 1,352
Originally Posted by JD'S WHITE 93
What does it tach at 80mph. A 2.59 will tach at 2000 rpm.
Jack it up get both rear tires off the ground and mark the driveshaft and spin the rear wheels by hand. Count the turns of the driveshaft. Or the easier way get the Rpo codes off the inside of your console door. Here are the codes
GM1= 2.59
GM3= 3.45
GT7= 3.33
GU2= 2.73
G44= 3.07
Jack it up get both rear tires off the ground and mark the driveshaft and spin the rear wheels by hand. Count the turns of the driveshaft. Or the easier way get the Rpo codes off the inside of your console door. Here are the codes
GM1= 2.59
GM3= 3.45
GT7= 3.33
GU2= 2.73
G44= 3.07
Last edited by JD'S WHITE 93; Aug 13, 2006 at 01:05 AM.
Safety Car
Joined: Apr 2001
Posts: 3,525
Likes: 2
From: Houston TX
Originally Posted by hill
what if any is the best way to get the rear end gear size with out pulling the cover off the rear end. if i have something smaller than a 307 i am going to change it. i am thinking it is a round a 2:56 but have not pulled the cover to know for shur it is a 1990 non zr1
Aaron
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: Jun 2006
Posts: 164
Likes: 0
From: tullahoma tn
the G codes are G44 & G92 & the D codes are DL8 D3X D9B
sorry for the d-lay i have not had time as of late to check the board sorry for the tripple post
sorry for the d-lay i have not had time as of late to check the board sorry for the tripple post
Last edited by hill; Aug 16, 2006 at 06:50 PM.
Thread Starter
Instructor
Joined: Jun 2006
Posts: 164
Likes: 0
From: tullahoma tn
well just put new tires on it BUT with the old hard balled tires the same thing checked the timing and its ok i have a new mac scanner and everthing apears to be ok have not checked fuel psi tho
