often i hear a big thump when i am driving around town, usually when i am decellerating , and more so down a hill. When i bought it from a friend he said it has always done that. I has not increased in frequency for me for almost 5000 miles. i have 133k on it. recently changed the traney fluid for second time since 5k miles ago b/c it was "black" but not burnt per the mechanic. had a few filings in it but told normal for age .
It shift fine. goes up the hill and shifts properly. sings along at 70mph on flat highway without probelm. the thump has not seemed to change in frequency or any other changes.
Also was always told that 93 automatics shift rough. do other folks 93s thump? Sounds like someone kicked the floor board. but shifts great otherwise.