Black-Syde

iTrader: (7)

Hey Guys I haven't been on here in awhile and I have a question. I just bought a 2001 Chevy 2500 HD. It has a 6.0 , auto trans , 2wd, regcab. I just wanted to know how do I find out what rearend it has and what the gear ratio is. The rear does whine a bit only when I am on the gas but when I let off the gas it is quiet. So there is something up with the rearend.

I have a 99 sierra that did the same thing so I had it rebuilt and upgraded everything. 2 grand later it is bullet proof.lol Now on this 2001 Chevy I just want to go cheap as possible so I have to weigh the odds of getting a junkyard replacement or to rebuild.

Thanks in advance

2004SSS

iTrader: (25)

you most likely have the 10.5 rear end the 3/4 ton gas trucks come with these usually and the diesels get the 11.5 aam rear.

ratio will be determined by vin.

AKlowriderZ71

iTrader: (22)

Look in the glove box, find the RPO sticker. Write down and post up all of your G-codes. They ID the gear ratio & if it's got the gov-bomb.

Black-Syde

iTrader: (7)

Ok the only codes in the glove box that start with a "G" is GT5, and GMC.
It does have a 14 bolt rear cover. Also I have been looking at junkyards and they ask if it is full floating or semi floating axles. Brakes are discs in the back if that helps.

DV2000NJ

iTrader: (10)

GT5 is 4.10s. If it's the HD, it should be a 14b full-floater.

Black-Syde

iTrader: (7)

Yes it is a HD Truck I was just looking thru some papers I found in the glove box and on the papers from Les Schwab it says that the truck had a brake job last year on the rear. It says that it has semi floating axles. Is there a set in stone way to make sure about the axles semi or full floating? Thanks for the help

DV2000NJ

iTrader: (10)

There's a way to tell by looking at the rear hub, but I can't remember exactly what it is, so I'll shut up.

James B.

iTrader: (1)

It's a 10.5" full floater.
You need a Duramax or an 8100 to get a 11.5" full-floater.
If it were not HD it would be a 9.5" semi-float.

LS-K5

14bff axle shafts are bolted to the outside of the hub.

Kerr

look under it count the bolts.