01 f-150 supercrew 4x4 4.6 engine. My transmission wouldnt go on reverse and i call a couple of shop to get a price to fix they were all over 1500 so i decided to go to a jackyard and find a used transmission for it and i did it came out a 02 and i had them install it and change teh spark plugs and oil change and the airfilter.. when i got the truck back i notice that while i acelerating it would make more noise like if the exhaust was broken and i took it back and they said everything was normal even after the engine light came up and the o/d light kept flashin and today i was driving it in the highway and notice it would take a while to get any speed after 65 it would barely get any speed and it would makes more noise like it the transmission was on nuetral.