01 F350 Auto Trans Pressure Problem??
I've got an '01 F350 Powerstroke with an Auto Trans. I've only recently purchased it & was told that the PO spend an obscene amount in repairs & maintenance over the last year, including a tranny rebuild, but I can't confirm this for sure. The truck has a lot of miles, but seemed to run & drive perfectly without a hint of a problem until a few days ago.
Problem: Without warning, the truck stopped moving while in a parking lot. No response in any gear, just like it was in Park. When the engine is turned off & left to sit, the trans works fine when started up again, but only for a minute or 2 before it seems to start to slip & then gives up totally again. Leave it sit for 1 or 2 minutes & the cycle repeats. The OD Off switch is seized & I'm not sure if the light works or not...I suspect not. I tried to hook up a scanner to check for codes, but it will not link up (but worked fine on other Ford trucks)... it appears that there are 5 or 6 wires in the harness that goes to the diagnostic connector that are cut, so I'm not sure if this is why. Anyway, I can't check for codes as far as I know.
With the nature of the problem, I'm suspecting a loss of pressure, possibly a pump or EPC solenoid? Could this be right or am I out to lunch? The truck does have an Edge Juice Powerprogammer and I've had friends that have had problems with these things & removed them. I first suspected this as a sourse of the problem, but I'm not guesing that it is a pressure problem. Because the problem comes & goes, I suspect the solenoid instead of the pump. If I'm correct, how exactly do I identify & possibly test this part (I'm assuming that you'll find it by removing the pan)? Any help or feedback would be appreciated. I'm hoping that I don't have to pull the tranny to fix the problem, but don't mind if needed.