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91 ford: This mainly happens when you first start off.What could it be

Customer Question

91 ford areostar shales from the back end. This mainly happens when you first start off.What could it be?

Thanks
Submitted: 11 years ago.
Category: Car
Expert:  Steve replied 11 years ago.
   There are several possibilities for this symptom:
(1) defective tire; look for lumps, bulges, or scalloping (cupping) on the rear tires. Some tire problems tend to be more noticeable on a cold tire untill it warms up a little from running and becomes a little more pliable.
   (2) Rear brake sticking on/ not releasing completely.   Pull the rear wheels and closely look at the brakes and hardware. Check for a stuck wheel cylinder, sticking parking brake cable, broken spring, or badly grooved backing plate.
   (3) I have seen many Zerostars with broken suspension springs in the back, although this usually results in the vehicle obviously sitting unevenly.
   (4) Possible worn out universal joint in the driveshaft, or a loose yoke on the rear end.

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