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Transmission puzzle. AW4 blues.

SquirrellyXJ

NAXJA Forum User
Location
Rowlett, tx
I’ve never had any major issues with an AW4 transmission until now and I’ve had several cherokees. This is a puzzle for sure and any help would be great.

2001 Jeep Cherokee 2WD with AW4 Auto Transmission. Transmission plate number 52104180AC. This is the correct transmission for the year and model.

CEL with PO780 shift malfunction and PO740 TC clutch solenoid malfunction.
Transmission will not engage overdrive. Drives normally otherwise.

The following has been done:
Replaced TC Clutch Solenoid
Checked Solenoid Harnesses
Replaced Torque Converter
Replaced Forward and Rear Speed Sensors
Fluid Flush and new Filter
Replaced Throttle Position Sensor
Adjusted Throttle Cable
Checked TCM and Harness
Checked associated Fuses (unless I missed one)
Checked Wiring as best I could

CEL returns like a recurring nightmare with same codes after just a couple miles.

What in the name of holy hell am I missing? I know the break pedal has a switch that disengages the overdrive; is there something there? Is there something stuck in the valve body? Rebuild time? Remanufactured?

Any help appreciated
 
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