Gear codes

bowtiefreak · Feb 24, 2011

It has come up more and more. Everyone should know whats in the truck. Below are the stock gear codes found in the glove box. You will have one and possibly two of the following codes if you have the G80 option. I have also listed a helpful gear to tire size chart to help people better understand.

GT4 -- AXLE REAR, 3.73 RATIO
GT5 -- AXLE REAR, 4.10 RATIO
GU4 -- AXLE REAR, 3.08 RATIO
GU5 -- AXLE REAR, 3.23 RATIO
GU6 -- AXLE REAR, 3.42 RATIO
G80 -- AXLE REAR, locking differential (has many names, none being good but that brings up a whole other discussion)

BluHoe96 · Feb 24, 2011

Wow! Big help on this glad u posted it. Looking for a rim and tire setup now so this is a big help!

97.twodoor.4x4 · Mar 30, 2011

Bowtiefreak. I was wondering if I run a 3" body lift along with a 3" suspension and run 35 or 36 tires am I gonna run into trouble not regearing my truck?

raptorforme93 · May 10, 2011

I was perfectly fine not knowing that I have the G80!!! But I do

Im about %90 sure that it doesnt work, but I havent tested it out. And I have a 3.42 ratio which also isnt fun. Thanks for the info though! I would never have known otherwise

Bad bow tie · May 10, 2011

97.twodoor.4x4 said:
Bowtiefreak. I was wondering if I run a 3" body lift along with a 3" suspension and run 35 or 36 tires am I gonna run into trouble not regearing my truck?

35" you should have at least 4.56 gears. Anything bigger should be 4.88 or even 5.13. You could probably get by on 4.10s for 35's but you will run the risk of putting extra strain on your engine and tranny.

ELOOSECANNON · May 30, 2011

How can you tell which code you have? I looked at the sticker in the glove box and there's like 6 or 8 columns of codes. Which ones are for what? I'm confused.

Bad bow tie · May 30, 2011

The codes are given in a number/letter ratio. For example: GT4 stands for a trucks gear ratio.. this specific code means the truck has 3.73 gears. Yours may be different. These codes give every option your truck came with from the factory. I.E. trim level, packages, everything from leather interior to sterio system to mechanics like tranny type, gear ratios, and engine types. It tells you everything and is pretty much a build sheet for your vehicle.

The best thing to do is to take a picture of your label located in the glove box and look them here http://www.rpocodes.com/

Hope this helps.

SunlitComet · May 31, 2011

Or enter your Vin here:

http://www.compnine.com/vid.php

99Yuk · May 31, 2011

Bad bow tie said:
...The best thing to do is to take a picture of your label located in the glove box and look them here http://www.rpocodes.com/...

...hehehe. I couldn't remember all those codes either, so I took a pic too....

coleman84 · Jun 14, 2011

Very helpful, thanks for posting!

Gear codes

bowtiefreak

No Quarter

BluHoe96

Member

97.twodoor.4x4

Member

raptorforme93

Full Access Member

Bad bow tie

Grizz Straight FTMFW

ELOOSECANNON

TYF Newbie

Bad bow tie

Grizz Straight FTMFW

SunlitComet

OBS Jedi-Do Good

99Yuk

Full Access Member

coleman84

TYF Newbie

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