Cadillac Cushion, engine support, rear on transmission to crossmember. Replaces #3631552. New rubber vulcanized to your old steel core. Inner core needed only; this cushion was not vulcanized to outer box or case. Allow 3 weeks. Compare with our part number 70-0629-11. 1949-56: Not original part but may have been retrofit with our number 70-0674-11 1957-59: Original part for all models 1960: Again, possible retrofit part