What rearends are in the Blazers?
BF Veteran
Joined: Jun 2006
Posts: 3,429
From: Vancouver. B.C. Canada
RE: What rearends are in the Blazers?
Rear Axle Identification
In your glove box you should have a list of RPO codes. Diff codes srart with a G
GT4
Rear Axle: 3.73 Ratio
GT5
Rear Axle: 4.10 Ratio
GU4
Rear Axle: 3.08 Ratio
GU6
Rear Axle: 3.42 Ratio
G67
Level Control: Automatic
G80
Rear Axle: Positraction
In your glove box you should have a list of RPO codes. Diff codes srart with a G
GT4
Rear Axle: 3.73 Ratio
GT5
Rear Axle: 4.10 Ratio
GU4
Rear Axle: 3.08 Ratio
GU6
Rear Axle: 3.42 Ratio
G67
Level Control: Automatic
G80
Rear Axle: Positraction
Thread Starter
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Senior Member
Joined: Dec 2006
Posts: 899
From:
RE: What rearends are in the Blazers?
I actually ment what rear end as in 10 bolt, 12 bolt, etc. Im guessing its a 10 bolt but I dont know by looking and havent found it in the owners manual.
Good info though.
Good info though.
RE: What rearends are in the Blazers?
The ZR2 & Highrider suspensions (Chevy & GMC variants) has an 8.5" rear ring gear. All others have the 7-5/8" ring gear. And yes, they are the GM-corp 10 bolt. The G80 locker is GMs Gov-loc arrangement and while it may be perfectly fine for on road to light offroad use, anything more and you'll want to put in a true posi or locker setup depending on your level of offroading.
BF Veteran
Joined: Jan 2007
Posts: 3,946
From: GP AB CA
RE: What rearends are in the Blazers?
ORIGINAL: swartlkk
The ZR2 & Highrider suspensions (Chevy & GMC variants) has an 8.5" rear ring gear. All others have the 7-5/8" ring gear. And yes, they are the GM-corp 10 bolt. The G80 locker is GMs Gov-loc arrangement and while it may be perfectly fine for on road to light offroad use, anything more and you'll want to put in a true posi or locker setup depending on your level of offroading.
The ZR2 & Highrider suspensions (Chevy & GMC variants) has an 8.5" rear ring gear. All others have the 7-5/8" ring gear. And yes, they are the GM-corp 10 bolt. The G80 locker is GMs Gov-loc arrangement and while it may be perfectly fine for on road to light offroad use, anything more and you'll want to put in a true posi or locker setup depending on your level of offroading.
Joined: Feb 2006
Posts: 820
From:
RE: What rearends are in the Blazers?
ORIGINAL: drperry
Got any suggestions on a good posi? Locker's are cool and all... but a posi rocks for 2wd slides, lol
ORIGINAL: swartlkk
The ZR2 & Highrider suspensions (Chevy & GMC variants) has an 8.5" rear ring gear. All others have the 7-5/8" ring gear. And yes, they are the GM-corp 10 bolt. The G80 locker is GMs Gov-loc arrangement and while it may be perfectly fine for on road to light offroad use, anything more and you'll want to put in a true posi or locker setup depending on your level of offroading.
The ZR2 & Highrider suspensions (Chevy & GMC variants) has an 8.5" rear ring gear. All others have the 7-5/8" ring gear. And yes, they are the GM-corp 10 bolt. The G80 locker is GMs Gov-loc arrangement and while it may be perfectly fine for on road to light offroad use, anything more and you'll want to put in a true posi or locker setup depending on your level of offroading.
RE: What rearends are in the Blazers?
It all depends on if you have the G80 locker or not. In an open case, everything can be installed without removing the carrier. If you have the G80, I don't think anything goes into a G80 carrier... So that means you'd need to find an open diff carrier and transfer over your gears, install new bearings, then install the posi/locker unit of your choice.