I just had my transmission rebuilt due to running it out of fluid after the trans cooler line ruptured. The first thing I noticed was how much better it held in overdrive on hills. Now it hardly ever unlocks the converter unless there is a steep hill. My gas mileage went up too. Noticable increase of 2-3mpg. I would guess that as the transmission/torque converter wear that it tends to unlock more often.


97 T100 4x4
SR5
Extra cab
Automatic
3.4L engine