[ziggy61]

I have recently purchased a 2002 Grand am SE1. Overall it's in good shape. I have just a couple of annoying problems. (1) there is a "squeal" when I make a hard right turn and (2) there is a "chugging" at 40-55 mph. The second problems concerns me more. I can let off the gas, then accelerate, and the car the problems smooths out. The engine performs fine otherwise. I have noticed that I don't have the problem if I drop into 3 rather than D. I have already replaced the spark plugs and wires, and one mechanic thought it might be the fuel filter, so we replaced that too. I've heard "overdrive sensor" and other transmission possiblities. Your suggestions please?