rear end gears? - Off-Road Forums & Discussion Groups
GM Standard IFS Trucks & SUV's All discussion of full sized IFS Trucks, SUV's to include Suburban

LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 01-04-2004, 09:22 PM
Posts: n/a
rear end gears?

hey i have a 1988 4x4 Gmc full size Z71 with a 4.3 std and iim wondering what it would have in it for gears? ne ideas let me know (theres no tag on the rear end either)
Sponsored Links
post #2 of (permalink) Old 01-04-2004, 10:01 PM
Join Date: Jan 2002
Posts: 374
Thanks: 0
Thanked 0 Times in 0 Posts
Re: rear end gears?

you looked in the glove box for the RPO codes? If you do a search for "RPO codes" you will come up with aa bunch of post.
Big_Red is offline  
post #3 of (permalink) Old 01-04-2004, 10:16 PM
Posts: n/a
Re: rear end gears?

3.42 or higher is my bet! [img]images/graemlins/tongue.gif[/img]
Sponsored Links
post #4 of (permalink) Old 01-05-2004, 12:03 PM
Carpal \'Tunnel
wrath's Avatar
Join Date: Nov 2001
Location: Waukesha, WI
Posts: 3,323
Thanks: 0
Thanked 1 Time in 1 Post
Re: rear end gears?

They never put Z71 stickers on a 4.3L-equipped truck nor did they put them on 88s or 89s. My guess is 3.73 or 3.42. Look in the glovebox for RPO codes.

Code Ratio
GU2 2.73
GU4 3.08
GU5 3.23
GU6 3.42
GT4 3.73
GT5/GT8 4.10
wrath is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Off-Road Forums & Discussion Groups forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome