The 1947 - Present Chevrolet & GMC Truck Message Board Network - Will a rearend out of a 90 Surburban fit a 87 truck?Was Gov lock any better in 90?

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Will a rearend out of a 90 Surburban fit a 87 truck?Was Gov lock any better in 90?

I just bought a complete rearend out of a 90 model Surburan.I pulled the back cover off and it is a 3:73 ratio with a Gov-Lock locking diff.It also matches the code in the glovebox.
I read somewhere the axle's were upgraded to more splines and the Gov-Lock was better than the older ones.I am planning to put it in my 87 C10.Will it bolt right in and will the ujoint yoke be the same?

Re: Will a rearend out of a 90 Surburban fit a 87 truck?Was Gov lock any better in 90

....I've never heard of one being upgraded...

Re: Will a rearend out of a 90 Surburban fit a 87 truck?Was Gov lock any better in 90

Quote:

Originally Posted by 72farmer (Post 8172348)

The rear end should fit just fine. However, as far as the axle being upgraded to larger axle shafts I think that only applied to the front 10 bolt starting in (89?) The Gov-Lock is ok in a mostly stock application but it is 28 years old more and likely. So I would inspect it and make sure it doesn't grenade as soon as you swap it in.