Just checked the rear end on by 72 trying to determine what it is. I believe it's a 10 bolt 8.5 unit. Can anyone confirm using the attached picture. Thanks in advance. I'm thinking of doing a posi upgrade...
I'm pretty sure that any 8.5 posi with 28 spline will work and fit.......since yours should have bolt in axles you dont gave to worry about if the sides has the c clip spot in them or not.......I believe they even make a drop in locker that will turn your non posi carrier into a posi/locker
I had Holiday posi, gear and rebuild kit special in the parts for sale section.... Going to shut this down next week... Yukon Dura grip posi 8.5 CORPERATE (1971 - 2018 GM REARS) NEW in the box 369.00 (includes 28 or 30 spline units) 1971 - 1988 GM REARS YUKON PREMIUM Gears 3.23 3.42 3.73 or 4.10 173.00 Master rebuild kit for the Yukon posi 87.00 PARTS LIST FOR KIT IS AS FOLLOWS 2 carrier bearings and races 1 inner pinion bearing and race 1 outer pinion bearing and race 1 Pinion seal 1 pinion crush sleeve 1 pinion nut 1 rear inspection cover gasket 1 carrier pack of carrier shims 1 pinion pack of shims 1 marking compound and applicator brush 10 ring gear bolts 1 RED loctite vial 1 booklet to help you with your set-up pattern and torque specs. Shipping will be determined by zip code. 40-50 POUND BOX
