Rear Axle Codes
#1
Rear Axle Codes
New to me 2002 Blazer and I'm going over it. After a search here I got these codes off of the glove box sticker and want to know what for rear axle is in this thing? GT4 and G80 are the only two 'G' codes on the list. The rear axle cover is rusted through to the point that it is leaking so I'm in the process of replacing it (new one on the way, old one is open and draining out). So...what does it have and can I verify it by looking at the gears in there?
Thanks,
Mark
Thanks,
Mark
#2
GT4 indicates that it is a 3.73 ratio
G80 indicates that it has the automatic locker in it
Most likely it is a 7.5 ring gear as that is the most common on these, but you can tell for sure by looking at the diff itself. The tell-tale sign between the two are a pair of protrusions on the bottom of the center section.
G80 indicates that it has the automatic locker in it
Most likely it is a 7.5 ring gear as that is the most common on these, but you can tell for sure by looking at the diff itself. The tell-tale sign between the two are a pair of protrusions on the bottom of the center section.
#3
GT4 indicates that it is a 3.73 ratio
G80 indicates that it has the automatic locker in it
Most likely it is a 7.5 ring gear as that is the most common on these, but you can tell for sure by looking at the diff itself. The tell-tale sign between the two are a pair of protrusions on the bottom of the center section.
G80 indicates that it has the automatic locker in it
Most likely it is a 7.5 ring gear as that is the most common on these, but you can tell for sure by looking at the diff itself. The tell-tale sign between the two are a pair of protrusions on the bottom of the center section.
#7
Yep, I's sure. Not sure about the model (it is new to me yet), does LS sound right? It seems loaded, heated seats, seat position memory, electric mirrors. 2002 MY. And it is an LS rear, I had to replace the rear cover and saw extra stuff in there. Then I tested it with one rear wheel off the ground.
#8
The reason I asked was that it didn’t sound familiar to me. I knew zr2 had the big rear with that ratio, but after searching found a old forum post that states that ratio was available in certain tow packages:
https://blazerforum.com/forum/steeri...999-4wd-46921/
https://blazerforum.com/forum/steeri...999-4wd-46921/
#9
The reason I asked was that it didn’t sound familiar to me. I knew zr2 had the big rear with that ratio, but after searching found a old forum post that states that ratio was available in certain tow packages:
https://blazerforum.com/forum/steeri...999-4wd-46921/
https://blazerforum.com/forum/steeri...999-4wd-46921/
#10
Here’s something else you may find interesting, inside you’ll find how to identify axle ratios by the code stamped into the axle tube:
https://www.gmheritagecenter.com/doc...let-Blazer.pdf
https://www.gmheritagecenter.com/doc...let-Blazer.pdf