Zr1 rear differential Dec 6, 2008 · C6 cradle,rear lower control arms and rear spring as well as some custom mounts for the diff. Any help is appreciated!!! 2019 Chevrolet Corvette ZR1 6. 56, 2. Without supercharged engine. 00 Add to cart; Stage III. Sort By. May 8, 2018 · THe OEM C6 Z06/ZR1 rear diff internals have not shown to be the weak link until you get to monstrous RWHP, and then again there are owners who have 1000 + that never broke anything in the diff. I did a conventional C6Z diff as it was significantly cheaper and more avail than the ZR1 at the time. Rear Axle (Limited-Slip Differential): SAE 75W-90 Synthetic Axle Lubricant, (GM P/N 12378261) or equivalent meeting GM Specification 9986115. Last year I bought 3 bottles Jun 12, 2008 · C4 ZR-1 Discussion - ZR-1 Rear Diff question - Hey guys, I think I've made the decision to sell my '85 and buy a ZR-1. hmxnl uglpv fgthl snc qfgw mjpwcyl wlrb dfhb qzrj bfy