is a 3.73 rear gear g80 posi '99 suburban same as the express r80?

[akskiffer]

that is the question. seen while searching for springs

Thanks

TK

 

[WVI]

I would say yes, but on Ford vans the diff is offset. I don't know if that is the same holds true on GM.

 

[86cj]

The 1500 van has different width axle housing than suburban they don't swap, the G-80 posi might swap into diff. They must be of similar year all 8.5" 10 bolts are not same, the ring gear is slightly bigger in later years..........The suburban leave springs just happen to be the same length width etc..they dont share chassis......Some same year 1500 suburban front suspension stuff works to like brakes, lift keys, shocks and maybe Upper control arms which I might find out myself....