2000 3.0 L AT 4x4 XLT I just replaced my motor, another 3.0 I know right, after blowing it up last week. While it was in the shop I swapped out the clunking 7.5 for an 8.8 both 3.73. Today was the first day driving and the speedo was indicating 80 mph while rpms were between 2500 and 3000 prior...