Question about 2004 Chevrolet Impala
It's a 2004 Chevrolet Impala LS w/3800 engine, 55K miles. Probably the best car that I have ever owned but it rides like a small car with 50 lbs of tire pressure. It just started one day going straight down the highway for no reason. Initially though that it was one of the new Goodyear tires.
Am having a whole car roughness and a little (just a quiver) front end vibration after approx 30 miles of driving. Have been through several sets of tires of different brands (Goodyear, Kelly). Have had the dealer road force balances several times, all new struts, front brake rotors and both hubs. 4 wheel alignment was all ok. Checked the wheels and tires and they all run totally true with literally no hop or side to side movement. Nothing helps. (Good thing for extended warranty)
Most recently had the steering gear intermediate shaft replaced for steering column clunking that took care of that problem but the roughness is still there. Went to a transmission shop and they said that it is not a tranny problem. Can be driving down the road (any road) and when it gets very noticeably rough I take it out of gear and that has no affect.
Anyone have any ideas ?
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