I brought my car, 71 New Yorker 8 3/4, 2:76 sure grip to the shop for a complete rear brake job, and new seals and bearings. When they opened it up, they found the left side axle was rusted where it meets the inner oil seal. I brought them an axle I had from a 71 Polara 8 3/4, 2:76 sure grip...