So gm told me it's a 3.73 posi with 9.5 ring gear, but everywhere else says it's a 10.5 ring gear.
Can anybody help me i.d "it".
"The info I have is from a 4 wheel parts catalog.
GM 10 Bolt 8.5" ring gear - axles are either 28 or 30 spline
GM 12 Bolt 8.875" ring gear - axles are 30 spline
GM 14 Bolt 9.5" ring gear - semi floating, egg shaped cover plate
GM 14 Bolt 10.5" ring gear - full floating, 6 bolt removable pinion support.
This is listed in what many believe the order of strength, the 10 bolt being the weakest and the 14 bolt full floater the strongest.
I am not sure of axle diameters."
http://www.coloradok5.com/axleguide.shtml