The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 06-14-2010, 10:22 AM   #1
84SierraClassic
Registered User
 
84SierraClassic's Avatar
 
Join Date: Apr 2010
Location: Twin Cities, MN
Posts: 52
Gear ratio identification

Hey guys. I am trying to identify what my gear ratio is in my rear axle, without having to tear it apart. I have tried looking it up with the RPO code, but all I can find is GQ1=standard axle ratio. Now, looking at RPO codes for the past 2 days I have found that gear ratios have codes GT*, or GU*. Now, I only have 1 sticker with RPO codes on the vehicle, on the left inner fender. No sticker with RPO codes in the glove box. So I am at a bit of a stand-still.

cliff notes:1984 GMC SierraClassic 1500. All stock with the only exception being the motor. Only RPO code I have to go off of is GQ1. Rear diff is GM Corporate 10-bolt.

I will get tire size info, and what RPM at what speed once I get a tach installed. There is a way to find out what gear ratio is by some formula isn't there?
__________________
Build it for go before show, and go big or go home!
2006 Ford Focus SE ZX3-89K 2.0L/MT 5spd -- Sold
1984 GMC Sierra Classic K1500 350/700r4/np208c(low gear 261) all stock otherwise(workhorse/pull truck) -- Sold
1974 Chevrolet Cheyenne K1500 366TD/SM465/np205 6" lift with 35s 1/2ton axles (project/mudder) -- Sold
84SierraClassic is offline   Reply With Quote
 

Bookmarks


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

Forum Jump


All times are GMT -4. The time now is 06:31 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com