What is gear performance ratio?
Thread Starter
Racer
Joined: Apr 2004
Posts: 354
Likes: 1
From: BARTLETT TN
St. Jude Donor '04-'05-'06-'07-'08-'09-'10-11-'12-'13
What is gear performance ratio?
Hey vette heads. I have a question. I just received my org. window sticker and on it says i have an upgrade performance axle ratio the cost was 50.00 What is that? If you know please help. thanks
Burning Brakes
Joined: Dec 2003
Posts: 770
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From: Madison Mississippi
I am not sure but, I believe you would have the 3.54 ratio. Very nice gear. If you have the A4 it would be a Dana 36 and standard transmissions come with the Dana 44. I put a 3.73 gear in my auto changing from a 2.79 and Wow, what a difference! A 3.54 is a nice all around gear. 
Advanced
Joined: Aug 2004
Posts: 85
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From: Motor City !! Mi
I have a 1990 6 spd coupe. I haven't gotten my windows sticker & build sheet yet....they are on order from The CM. According to my RPO codes inside my console & a RPO code chart I found online, I have "GT7-Rear axle 3.33 ratio". If anyone knows the codes, does that code matchup correctly ?
Le Mans Master
Joined: Jan 2004
Posts: 7,276
Likes: 3
From: Why are there squished peanut butter cups in my underware?
In the `95 model year, automatics had two different rear axles available.
Standard was the 2.59 ratio (RPO GM1)
Optional was the "performance axle" 3.07 ratio (RPO G44)
The 3.45 ratio was only available with 6-speed manuals.
As for the `90 model year, 6-speeds had two rear axles ratios.
L-98 engines (base) had the 3.33 ratio
LT-5 engines (ZR-1) had the 3.45 ratio.
Standard was the 2.59 ratio (RPO GM1)
Optional was the "performance axle" 3.07 ratio (RPO G44)
The 3.45 ratio was only available with 6-speed manuals.
As for the `90 model year, 6-speeds had two rear axles ratios.
L-98 engines (base) had the 3.33 ratio
LT-5 engines (ZR-1) had the 3.45 ratio.
Last edited by Z-07 freak; Sep 1, 2004 at 05:38 PM.
Advanced
Joined: Aug 2004
Posts: 85
Likes: 0
From: Motor City !! Mi
Originally Posted by Z-07 freak
In the `95 model year, automatics had two different rear axles available.
Standard was the 2.59 ratio (RPO GM1)
Optional was the "performance axle" 3.07 ratio (RPO G44)
The 3.45 ratio was only available with 6-speed manuals.
As for the `90 model year, 6-speeds had two rear axles ratios.
L-98 engines (base) had the 3.33 ratio
LT-5 engines (ZR-1) had the 3.45 ratio.
Standard was the 2.59 ratio (RPO GM1)
Optional was the "performance axle" 3.07 ratio (RPO G44)
The 3.45 ratio was only available with 6-speed manuals.
As for the `90 model year, 6-speeds had two rear axles ratios.
L-98 engines (base) had the 3.33 ratio
LT-5 engines (ZR-1) had the 3.45 ratio.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
GT7, is indeed the designation for the 3.33:1 ratio
95VETTEINMEMPHIS,
G92 only indicates that your car is equipped with the "performance ratio" for that car. The standard, and therefore, the performance ratios changed from year to year, with the transmission selected, and coupe vs convertible, some years. There should be another "G" RPO designating the actual ratio your car was built with.
RACE ON!!!
95VETTEINMEMPHIS,
G92 only indicates that your car is equipped with the "performance ratio" for that car. The standard, and therefore, the performance ratios changed from year to year, with the transmission selected, and coupe vs convertible, some years. There should be another "G" RPO designating the actual ratio your car was built with.
RACE ON!!!
