I have a 1999 F150 4X4 supercab with the 4-spd auto tranny, 47K miles. This only happens once in a while but most likely when I am towing: When I am gradually slowing down from 50 or more, when I am down to 30-35 mph there is a noticable thunk. It also happens to a lesser extent when I am gradually excellerating, real light on the gas. The truck is otherwise perfectly quite and shifts correctly. Maybe that's why it is so noticeable. Does this truck have a "lock up" tourque converter? Because thats exactly what it sounds like.
p.s. I had Ford service the tranny at 45K and it made no difference, and I forgot to mention it to them then.
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company
Tranny "thunk" at 30-35 mph.
Linear Mode
