finding out the rear end gearing?

NeXuS1 · July 25, 2001

i was wondering if anyone can help me figure out what the rear end gearing is on my 95

BIG BLUE · July 25, 2001

Nexus,

Is your 95 a 1/2 ton 3/4 ton? The easiest way is to look for the RPO code in the glovebox (this is a sticker on the inside of the glovebox with a bunch of alphanumeric "codes"). For the rear end ratio the RPO code will start with a "G" here is a list of most of the rear ends in the GM's. Most likely you have either a 3:42, 3:73 or possibly a 4:10.

Here is the list:

GH0 AXLE REAR, 3.54 RATIO

GH2 AXLE REAR, 2.29 RATIO

GH3 AXLE REAR, 2.77 RATIO

GH4 AXLE REAR, 2.92 RATIO

GK9 AXLE REAR, 4.63 RATIO

GL3 AXLE REAR, 6.17 RATIO

GM1 AXLE REAR, 2.59 RATIO

GM3 AXLE REAR, 3.45 RATIO

GM8 AXLE REAR, 2.56 RATIO

GQ1 AXLE, STD RATIO

GS4 AXLE REAR, 3.70 RATIO

GTY AXLE, WIDE TRACK

GT4 AXLE REAR, 3.73 RATIO

GT5 AXLE REAR, 4.10 RATIO

GT7 AXLE REAR, 3.33 RATIO

GT8 AXLE REAR, 4.10 RATIO

GU1 AXLE REAR, 2.41 RATIO

GU2 AXLE REAR, 2.73 RATIO

GU4 AXLE REAR, 3.08 RATIO

GU5 AXLE REAR, 3.23 RATIO

GU6 AXLE REAR, 3.42 RATIO

GV2 AXLE REAR, 5.83 RATIO

GV4 AXLE REAR, 3.36 RATIO

GV8 AXLE REAR, 2.72 RATIO

GW4 AXLE REAR, 3.31 RATIO

GW6 AXLE REAR, 3.27 RATIO

GW9 AXLE REAR, 2.93 RATIO

GX3 RATIO,TRANSAXLE FINAL DRIVE 3.33

GYS RATIO TRANSAXLE FINAL DRIVE 3.65

G44 AXLE REAR 3.07 RATIO

G5O SPRING REAR, HEAVY DUTY, VAR 1

G51 SPRING REAR, HEAVY DUTY, VAR 2

G52 SPRING, RR, 15000 LBS

G60 SPRING REAR, AUXILIARY

G66 LEVEL CONTROL, MAN, AIR

G67 LEVEL CONTROL, AUTO, AIR

G69 LEVEL CONTROL, AUTO, AIR, HD

G72 AXLE REAR, 2.14 RATIO

G75 AXLE REAR, 3.62 RATIO

G80 AXLE POSITRACTION, LIMITED SLIP

G87 RING GEAR, 8.50 INCH

G89 RING GEAR, 7.50 INCH

G92 AXLE REAR RATIO, PERFORMANCE

G9S AXLE REAR RATIO, ECONOMY

Hope this helps,

BIG BLUE

NeXuS1 · July 25, 2001

3/4 ton 8 lug version thats why it went in this forum

NeXuS1 · July 25, 2001

i found it.. it looks to be that i have the 4.10 and limited slip options.. wonder what all those other codes mean.

(Edited by NeXuS1 at 3:18 am on July 25, 2001)

DigUout · July 25, 2001

I have mine for my '98, but I think we have some different options. Easiest way is to take your VIN #, to the dealer, or a Chevy dealer (you never said if you got the new truck from a dealer or individual?) and they can punch your # in their computer and it'll printout what every code on your truck is for, like window and seat styles, the GVW, fleetside or stepside, paint, alternator amperage, speaker size, brake types, etc. And it should be free-

NeXuS1 · July 25, 2001

i got mine private party.

BIG BLUE · July 25, 2001

Nexus,

Glad you found the rear end ratio. Here is the link that will list most of the other RPO codes that are on that sticker.

http://www.thirdgenmonte.com/rpo.html

Have Fun!

BIG BLUE

NeXuS1 · July 25, 2001

thanks for the help.

Shaners · July 25, 2001

Quote: from BIG BLUE on 1:36 pm on July 25, 2001
Nexus,

Glad you found the rear end ratio. Here is the link that will list most of the other RPO codes that are on that sticker.

http://www.thirdgenmonte.com/rpo.html

Have Fun!

BIG BLUE

That's a great link big blue!!! Thanks for sharing it with us...