When I'm driving for a while at around 55to 65mph and I go either uphill or downhill, the car will start to buck and i'll give it gas and it will go away. I think it might be the exhaust that I put on that it doesn't have enough back pressure when traveling at that speed or it might be the torque converter going. the car runs great under 50mph, I had a tune-up on the car changed all fluids had all new filters installed. I'm not sure what to do now to fix this, Please help.
Apr 20, 2010 at 11:12 AM
