WELL AT FIRST MY 2001 F-150 SUPERSCRIPT AT 55000 MILES STARTED TO LAG, WHEN I WOULD PRESS THE GAS IT WOULD TAKE A LONG TIME TO PICK UP SPEED OR CHANGE GEARS. THEN ONE DAY I WAS DRIVING HOME FROM WORK GOING ABOUT 55 MPH WHEN I HEAR A LOUD POP, I LET GO OF THE GAS PEDAL BECAUSE IT REALLY SCARED ME I HAD TO REGAIN CONTROL OF MY VEHICLE ONCE I DID I TRIED PRESSING ON THE GAS AND IT WOULDN'T GO ANYWHERE SO I DECIDED TO PULL OVER AND HAVE TO TOWED TO A FORD DEALERSHIP, IT WAS THERE THAT THEY TOLD ME IT WAS GOING TO COST ME 2500 HUNDRED DOLLARS TO FIX. NOW I HAVE TO WAIT TWO WEEKS UNTIL IT GETS REPAIRED. *JB