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.
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Tuesday, April 20th, 2010 AT 11:12 AM