My car has started making a knocking/ thumping noise when u drive and only when u drive! By this i mean when the wheels r im motion. It seems when the wheels hit a certain rotation point the thump, thumps...and the faster i go the more fequent it becomes...now i thought MAYBE this was a sign of new brake pads so i replaced them...nope still there. Now i cant tell if its comming from the left or right side but its loud but not loud enough to hear with the stero on. Im making a 9hr trip next month so i need this fixed ASAP! What could be causing this? CV joints? Low tranny fluid?

P.S: Is teh tranny suppose to whine when shifting? Cause if not suppose to?


95 Neon MTX 2dr- 2.4 engine, more to come...
01 Cavalier 2dr- 2.2, GF's car, full pioneer system......still needs mods.

Why would brake pads cause a pulsing thump? The pad's don't rotate, the brake rotors do which, if they had a bump in them, would hit the pad at a certain point each rotation, clearly. I'm not sure how people think pads are the answer to a rotor issue.

However this sounds more like a transmission issue.


2001 Olds Alero (LD9)
650 whp / 543 ft-lb
@turboalero

Check your tires, look for lumps etc. Maybe even rotate them, if the noise moves with the tires then theres a pretty good chance you have bad tires, if not then you can push that idea to the side for a while.

Transmission whine can be common in some cars but maybe check the fluid level and condition and maybe even change the fluid and filter.






(99 - Sunfire - Red - 2200)(95 - Cavalier z24 - Purple - 2.3 quad four)