AWD equipped vehicles can show a wide range of transmission problems, often caused by using the wrong-sized and/or mismatched tires. Be sure that all the tires are the same and that all four are replaced at the same time. Dodge recommends tire rotation every 7,500 miles.
Car Problem Reports
Chrysler Town & Country Same Size Tires Recommeded For AWD Equipped Vehicles
Chrysler Town & Country Problem
Visitor, 2000 Chrysler Town & Country
Had to have 2 tires replaced due to wear. Tire shop is required to replace the front tires by law here and did so by using manufacture recommended size instead of size of all the other tires. For some reason the old tires and the 2 on the rear were larger than the 2 new ones. The difference was not noticeable by looking. Within 2500 miles it caused major transmission problems.