Spires

From the outside without taking off the cover? I turned in the axle code but Chev dealer does not seem to know which it is.

nightrunner

iTrader: (4)

if its stock in your truck you have the 10.5"

Spires

Nah, the one in my truck is the 9.5inch SF one. I bought one from a wrecked 2004 2500HD with only 5k miles on it. The axel is HUGE and full floating I tried the VIN number, but GM could only tell me it was 4.10 gears. I tried the code stamped on the axel, but that didnt get me anywhere.

nightrunner

iTrader: (4)

ya, i thought you had a 2500HD for some reason, just now looked at sig

do you know what motor the wrecked 2500hd had

2500HD w/ 6.0 = 10.5"
2500HD w/ 8.1L OR DMAX = 11.5"

BigCountryx

iTrader: (3)

AAM 14 bolt 11.5

Corporate 14 bolt 10.5

Spires

yea, the 2500 had a 6.0L. from those pics looks like a 10.5".

DZ302

How about a pic of that Blue Beast?

Torque_Wrench

iTrader: (13)

My friend...you'll just ahve to remove the cover...and break out the ol' Tape measure.