Rear Grears
Thread Starter
Racer
Joined: Jul 2008
Posts: 354
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From: Emporia Ks
Rear Grears
I have done a search but cant find the post on how to tell what rear end you have. I know its the numbers in the glove box and under the rear hatch but cant find the post. Help---thanks
Safety Car
Joined: Nov 2002
Posts: 4,025
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From: Valdosta GA
If you have a 6 speed you have the 3.42 (no matter if you have the Z06 or coupe/vert).
If your RPO codes (should be in center console cover or glove box door depending on year model) show a G92 you have the automatice with the performance axle ratio (3.15 rear gears). If you don't show G92 you have the base axle for automatics (2.73 rear gears).
I'm sure someone else will chime in and correct me, but I think you can also do 70 in 3rd gear in the automatic and divide your engine RPM by 1000 to get your axle ratio - will be about 3150 rpm for performance axle and 2700 rpm for base).
If your RPO codes (should be in center console cover or glove box door depending on year model) show a G92 you have the automatice with the performance axle ratio (3.15 rear gears). If you don't show G92 you have the base axle for automatics (2.73 rear gears).
I'm sure someone else will chime in and correct me, but I think you can also do 70 in 3rd gear in the automatic and divide your engine RPM by 1000 to get your axle ratio - will be about 3150 rpm for performance axle and 2700 rpm for base).
Le Mans Master
Joined: May 2007
Posts: 5,383
Likes: 6
From: hagerstown md
St. Jude Donor '08-'09
GU2=2.73
GU6=3.42
G90=3.15
G92=axle, rear, performance ratio
http://www.digitalcorvettes.com/foru...ad.php?t=61785
GU6=3.42
G90=3.15
G92=axle, rear, performance ratio
http://www.digitalcorvettes.com/foru...ad.php?t=61785
Pro
Joined: Jan 2007
Posts: 543
Likes: 1
GU2=2.73
GU6=3.42
G90=3.15
G92=axle, rear, performance ratio
http://www.digitalcorvettes.com/foru...ad.php?t=61785
GU6=3.42
G90=3.15
G92=axle, rear, performance ratio
http://www.digitalcorvettes.com/foru...ad.php?t=61785
I wonder if the " G92 " is the rearend for the Z06.
The Z06 is also a 3:42 to 1 ratio,but with hardened inerds. ( Is that a word? )
Roger T
Safety Car
Joined: Nov 2002
Posts: 4,025
Likes: 2
From: Valdosta GA
The G92 and the G90 goes hand-in-hand. There was no special rearend for the Z06 as far as gearing (all 6-speeds had the 3.42 gears regardless of Z06 or coupe/vert). The G92 was only available on the automatic and provided the 3.15 axle ratio.
Melting Slicks
Joined: Nov 2003
Posts: 2,887
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From: Macomb MI
St. Jude Contributor
Pro
Joined: Jan 2007
Posts: 543
Likes: 1
Yes, you are correct that all manual transmissions have 3:42 rear end gear ratio.
Roger T
Safety Car
Joined: Jul 2001
Posts: 4,661
Likes: 67
From: Ocean Springs MS
The G92 code indicates you have the optional rear end. G90 indicates it is a 3.15 ratio rear. Several options are like this, trannies for instance. MN6 means you have a 6 speed tranny. The other code, MM6 for coupes/verts and M12 for Z06s indicates what particular 6 speed you have.
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Melting Slicks
Joined: Apr 2009
Posts: 2,772
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From: Gastonia NC
St. Jude Donor '10
GU2=2.73
GU6=3.42
G90=3.15
G92=axle, rear, performance ratio
http://www.digitalcorvettes.com/foru...ad.php?t=61785
GU6=3.42
G90=3.15
G92=axle, rear, performance ratio
http://www.digitalcorvettes.com/foru...ad.php?t=61785
Race Director
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From: Reno is so close to Hell you can see Sparks , State Of Confusion
St. Jude Donor '12-'13-'14
You are correct. The Z06 had the getrag 3.42SP.....all others had the getrag 3.42
Race Director
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From: Reno is so close to Hell you can see Sparks , State Of Confusion
St. Jude Donor '12-'13-'14
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From: S.W. Ohio. . . . . . NRA Life Member
Race Director
Joined: Jul 2007
Posts: 18,681
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From: Reno is so close to Hell you can see Sparks , State Of Confusion
St. Jude Donor '12-'13-'14
