rear end size

[tunerpike]

I have a 95 ext. cab s10 with a 4.3 factory automatic trans. Is it a 7 1/2 or 7 5/8? Wanting to order a 3.73 and I don't know the size.

[ZR1-S10]

7 5/8" 10 bolt with 28 spilne axles.

[firefighter]

Yeah they've all been 7 5/8 since I think '88 but the ring and pinion is the same between the two rears. It's the carrier and axels that have changed.