Hello, I have a 2001 Explorer that just doesn't go when I press on the pedal. It's a 4.0 SOHC 2wd. The engine revs to 2000 and it sluggishly accels. Loosened one caliper on driver side because it was dragging, suspect pass. side, but doesn't pull to that side but still makes noise. Also, once I finally reach around 40mph tranny slips, it bucks. And then it seems to stay reved up as I depress brake. So slowing down it downshifts hard cus engine is still reving down to 1000 where it stays at red lights and then it begins to overheat. Really need any suggestions and help on this one, just bought it.