7 1/4 Differential Sure-Grip 1965

Yup only the heavy thunk when initially going to drive or reverse. After driving awhile seems less of a thunk but still there. She drives real nice no whines no other noises for the last couple of years. Rebuild transmission last year by a shop and I and some friends finally put the rebuild 273 in. loves to run since doing those things. Vintage Carter 4 bble loves to drink. Really appreciate the insight into the 8.75
Roger
That thunk is called the chrysler clunk haha