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minnuplander, could you take a picture of the rear suspension and post it? I know it may be kinda hard with a 5.5" ground clearance, but maybe we can confirm that you do in fact have a trailing arm suspension.
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You mentioned your Uplander still has the (original) Goodyear Integrity tires...our '08 also came with Integrity's. Ours started having serious tire wear problems well before 30K miles when we had purchased it used (scalloping, cupping, etc.) but the area's best technician using Hunter laser-aligning equipment reported it was tire problems, not a vehicle problem; and to switch tire brands, as they've experienced other Integrity wear problems. Several months after his diagnosis, I absolutely had to switch tires, because both Integrities on the front had thrown belts and were seriously out-of-round, making scraping noises, a dangerous situation. I'd think it could be difficult to impossible for one to diagnose possible vehicle suspension or shock problems if the tires are no good. Our current Firestone FR710's are doing well, and there are other good brands available.
OK, everybody is right here. There are 2 different types of rear suspension. Independant Rear Suspension(IRS) with leading a trailing control arms and the whole bit.
This type is found in AWD models. The also have whats called a Twist Axle, which is basically a peice of steel going from side to side, this type is found in FWD models.
As far as rear Alignment is concerned, if its a FWD, make sure nothing is bent. If its AWD, the toe and camber are adjustable
But in all cases, toe and camber are adjustable in the front. If the caster is out of align, something is bent or loose.
IRS
Twist Axle
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SOrry for taking so long to get back. Lets start over. Front wheel drive, Striaght rear axle, no independant rear suspenion, tires are wearing on the inside, Had it to village chev and put on the rack they said allignment was within the tolerances(front and back)
My uplander also has developped a small cupping wear on the inside of the rear tires. The front tires are perfect. My van has only 10,000 kilometers. I am planning to rotate only the rear tires to start the wearing on the reverse.You are right that it has a solid axle on the rear. it is called a twist beam.
