If the solenoids are all new and the problem persists, I would look at what controls the solenoids. The Powertrain Control Module energizes the shift solenoids based on information it receives from various sensors, ie. speed sensor, throttle position sensor. Turn your attention to these items and away from what has already been repaired. The only other solution is, the transmission is bad.
This sounds exactly like the same problem I just fixed a day and a half ago in a Lincoln. The Torque Converter Clutch solenoid was causing this.l Or the TCC solenoid. I see that you do have the circuit code. I just replaced one.
The symtoms all refer to a sticking piston it the valve body
VECHICLE NOT SHIFTING RIGHT COULD BE FAULTY TCM HAVING TOO MANY SHIFTING PROBLEMS.
TRANSMISSION SHIFT VALVES 1 2 3 ARE ON AT ALL TIMES. TRANSMISSION SHIFTS FROM FIRST GEAR THEN TO SECOND GEAR FROM SECOND TO THIRD GEAR WHICH OVERDRIVE TORQUE CONVERTER LOCK UP OCCUR THEN TRANSMISSION WILL DOWN SHIFT BACK DOWN TO FIRST GEAR.
REMOVE SOME OF TRANSMISSION FLUID ADD SOME TRANSMISSION ADDITIVES THAT WILL FREE UP STICKING SHIFT VALVES.I FORGOT MENTION FAULTY VECHICLE SPEED SENSOR WILL TRANSMISSION SHIFT PROBLEMS. IF TRANSMISSION VALVES DONT UNSTICK. YOUR BEST BET TAKE TRANSMISSION TO SHOP WORK ON TRANSMISSION. BECAUSE TRANSMISSION PARTS HIGH. THE SHOP CAN HOOK TRANSMISSION TO A SPECIAL SCANNER IN WHICH CAN SCAN ACTIVATES ALL SOLENOIDS IN VALVE BODY SEE WHICH ONE IS BAD.
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How would that explain the shift solenoid 3 switching on when it should stay off in reverse
But why would the #2 & #3 shift solenoids not function correctly?
shifting problem
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