Front Suspension Problems of Mitsubishi Diamante

2001 Mitsubishi Diamante. We have had it about six months. I have had it in to a very reputable service station and have come up empty on the following problem. The car has new tires, this occurred before and after they were installed. During more aggressive turning the car gets very unstable, bad enough to lose control. The service shop checked out all the obvious front end stuff along with the three bushings on each front wheel assembly. For the most part the car tracks straight down the road and is smooth and true. It may be described as a little soft in handling but nothing severe until this situation occurs. The shocks and struts seem ok. The car has 70,000 miles?.

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I am feeling a constant vibration on the front end of car, and I just replaced the front tires. I checked to see if the weights are still on the rim and they are. All of a sudden I started to hear a very loud noise and when I pushed the gas pedal the vibration would get worse.

Vehicle front end shifts back and forth when behind tractor trailers on highway. Situation is dangerous when tractor trailer pulls out in front of me. Not due to tailgating, since it is the worst when approximately 5 car lengths are between tractor trailer and me. Car is difficult to control due to shifting. Front end was checked and there are no alignment problems, and tires have been replaced. Shifting continues to occur even with traction control turned off. Aerodynamics problem or vehicle stability problem? also own a 1998 Diamante that does not have this problem. Problem has occurred since vehicle purchase and severity of problem has remained the same.

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When I apply the brakes, the car shakes and jerks uncontrollably. I have had work done on the rotors as well as the brakes. I have four new tires, but problem still occurs. I am afraid that one day while driving this car the brakes will fail and cause my family and I serious injury . This is a 2003 Mitsubishi Diamante, and the incidents have occurred daily 3 months after I purchased the vehicle.

Front end alignment is off, causing tires to cup/ making steering vibrate, and loud noises. Replaced parts, problem still occurring.