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Vehicle make/model = 2001 Pontiac Grand Prix Mileage = 70000 Engine size = 3.8 3800 dash lights = ABS and Trac off Lights sometimes codes = Transmission code was on and speed sensor light work done prior = Change both front hubs. work done to repair = Both Front hubs with speed sensors tip/donation no = buttonId tech = SF question = Ok here goes. My car ran fantastic for a long time. It hit about 60000 miles. I noticed some growling from the car. Happens when i turn corners or inclined driveways sometimes out of nowhere. Shakes steering column. Sometimes it kicks on my abs light and trac off light. Also, and maybe tied with in previous condition list earlier. When vehicle is warm it shifts hard. I took it to a mechanic in my town and he said i had three codes. one transmission code and one code for my hub assemblies needing replaced. I dont remember what the other code was. I did however go to auto zone and they tested my car and no codes came up. what do you think could be the issue of these problems. sorry to add on but I did change both wheel hub assemblies.
SF: The codes are really the key. The trans code and the other codes that was not front hub related. If no codes came up at autozone, then i would suspect the local mechanic cleared the codes,and one or more just have not returned yet, even though the shifting problem. If you can find out what the code numbers were- maybe on mechanics reciept, then i could give some advice.