I have an 87 F150 with 5.0 EFI and automatic, I believe C6 3speed, truck is running at 2700 rpm's while cruising at 55 mph, shouldnt this thing have a lockup torque converter or something to lower the rpm's. I've had it about 6 months and just cant imagine that it was built to rev that hard. Anyone have any ideas?

 

Nah man..the C6 is only a 3 speed. No overdrive. the AOD and E4OD would go into overdrive at that point.

 

yeah, my sisters '89 '250 the valves float when you get around 75mph. and that things got a 460, imagine how much gas is burning...