So, I just got my new wheels/tires installed the other day. Since then, when I am on the highway doing about 75mph, it's lagging in switching to overdrive. When I first get up to 75mph, it'll stay around 3,500k RPM and then finally kick into overdrive about 2-3 minutes later. What could be the issue?

 

did you get your speedo corrected?

 

NO, i've just been using my GPS for an accurate speed.

 

Disconnect the battery for awhile then see if it still does it.

 

Brake caliper sticking maybe... I had this problem when it wouldn't go into overdrive