Diff ratio?
Is there a way I can tell what my stock diff ratio is? VIN perhaps?
Safety Car
Joined: Jun 2003
Posts: 4,509
Likes: 240
From: Coconut Creek FL
you can look on the rear end itself- you will see a tag with the name GETRAG on it (that's who makes it) you will also see the ratio in one of the line items...
Also, if you look under the drivers rear hatch compartment, you should see an RPO or production sticker listing all of your installed options from GM...if you have one that says G92- you have the 3:15 rear axel ratio...this is for automatics only, if it does not state G92 it is a 2:73 rear gear. All 6 speeds came with the 3:42 rear axel ratio.
Hope this helps!
Also, if you look under the drivers rear hatch compartment, you should see an RPO or production sticker listing all of your installed options from GM...if you have one that says G92- you have the 3:15 rear axel ratio...this is for automatics only, if it does not state G92 it is a 2:73 rear gear. All 6 speeds came with the 3:42 rear axel ratio.
Hope this helps!
Last edited by byte_me; Jun 28, 2005 at 03:49 PM.
Racer
Joined: Jul 2003
Posts: 460
Likes: 0
From: N. Potomac MD
This should help. Look at the RPM at speed in 6th.
3.42 3.73 Rear gears
RPM 6th RPM 6th
1300 60 1300 55
1400 65 1400 60
1500 70 1500 64
1600 74 1600 68
1700 79 1700 72
1800 83 1800 77
1900 88 1900 81
2000 93 2000 85
3.9 4.10 Rear Gears
RPM 6th RPM 6th
1300 53 1300 50
1400 57 1400 54
1500 61 1500 58
1600 65 1600 62
1700 69 1700 66
1800 73 1800 70
1900 77 1900 74
2000 81 2000 77
RPM 6th RPM 6th
1300 60 1300 55
1400 65 1400 60
1500 70 1500 64
1600 74 1600 68
1700 79 1700 72
1800 83 1800 77
1900 88 1900 81
2000 93 2000 85
3.9 4.10 Rear Gears
RPM 6th RPM 6th
1300 53 1300 50
1400 57 1400 54
1500 61 1500 58
1600 65 1600 62
1700 69 1700 66
1800 73 1800 70
1900 77 1900 74
2000 81 2000 77
