Sunfire 2000.? The other day, my 2000 Pontiac Sunfire made a loud "clunk" noise from the rear end, and since then, whenever I accelerate from a stop, a very loud knocking noise and intense vibration happen. The noise is not coming from the engine, it's coming from the middle/rear of the car. Once I get up to about 20 mph, it smooths out and stops. Accelerating from anything above 25 mph or so doesn't produce this noise.
I think it might either be a transmission problem--chipped tooth or something--or a CV joint. But, at the same time, it stops halfway through a gear, rather than stopping when switching into a new gear, and even though it gets worse with turning, it doesn't happen when turning at more than 25mph.
More facts:
--If I gently accelerate, it doesn't happen. Only if I accelerate normally, or roughly.
--Stopping the car sometimes produces a clunking noise.
--It's not a new engine, but I literally had the engine replaced with a refurbished one less than a year and a half ago.
--No history of transmission problems.
Can someone tell me what this is likely to be? I know just enough about cars to know that I'm probably getting screwed by Pep-Boys, but not enough to fix it myself. Thanks!
I think it might either be a transmission problem--chipped tooth or something--or a CV joint. But, at the same time, it stops halfway through a gear, rather than stopping when switching into a new gear, and even though it gets worse with turning, it doesn't happen when turning at more than 25mph.
More facts:
--If I gently accelerate, it doesn't happen. Only if I accelerate normally, or roughly.
--Stopping the car sometimes produces a clunking noise.
--It's not a new engine, but I literally had the engine replaced with a refurbished one less than a year and a half ago.
--No history of transmission problems.
Can someone tell me what this is likely to be? I know just enough about cars to know that I'm probably getting screwed by Pep-Boys, but not enough to fix it myself. Thanks!
