Will These Gears Fit?

[201fireman]

I have a 72 Monte with an Eaton Truetrac 12 bolt, series 3 posi and 33 spline Yukon axles.  I am looking at a set of 3.73 ring & pinion gears out of a 70 Chevelle 12 bolt. They have the part number 3862525 stamped on them. Will these work in my unit?

[72-CLASSIC_RIDE]

You should be able to reference Differential websites like Rand'ys Ring & Pinion (example).  Both are 3 Series so should interchange.  Not certain about the axles or if even factory rear axle.

 

Doug 

[MC1of80]

Short answer---- yes I have a set of GM 3:31 in my 12 bolt with a Detroit trutrac and strange axles.