I just installed 18" wheels and tires, now (only in the morning) my transmisson hesitates shifting from 2nd to 3rd gear. It will rev up 3000rpm and finally shift with kind of a jerk. I didn't think the wheels and tires would make this happen. The only other factor that may play a roll is the fact that I just changed rear brake shoes. Does anyone have an idea to what may be causing this? I haven't changed tranny fluid yet, hoping that I won't have to, but it does need it at 53,000 miles.

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