2005 toyota corolla torque converter clutch solenoid replacement

OK, after hours of scouring the internet and doing a search on this forum, i cant find one person who has had their torque converter clutch solenoid replaced. Last weekend i got the dreaded p0741 code. Now, I have seen where people have had their ECM units replaced, then their car throws out the p0741 code. The ECM in the wifes 05 corolla was replaced in march of 2011, and we did not get the code and have had no problems with the car until now. Transmission fluid is fine, and the car still runs and shifts just fine. The only issue I had was when trying to go uphill on the interstate and trying to accelerate the car would get a weird vibration and lose power. But on flat land it would cruise at 75 mph no problem. Before i pay my guy to open up the transmission and replace the solenoid, i was wondering if anyone has had the TCC solenoid replaced and if it remedied the situation. I have read where people have had ECM's replaced, and even have been told they need a new transmission and replaced it, only to have the code return. Like I said our ECM was replaced over a year ago, so i assume that cant be it. The car does have 150,000 miles on it. Ok, believe it or not as i was typing this the wife called to say the check engine light went out, now im really confused.

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I attached the diagram of the valve body for you to view. There is no actual torque converter solenoid but there is a valve for it in the valve body. Check out the diagrams (Below).

REMOVAL

1. REMOVE ENGINE UNDER COVER LH
2. DRAIN AUTOMATIC TRANSAXLE FLUID
(a)Remove the drain plug, gasket and drain ATF.
(b)Install a new gasket and drain plug.
Torque: 18 Nm (180 kgf-cm, 13 ft-lbf)
3. REMOVE AUTOMATIC TRANSAXLE OIL PAN SUB-ASSEMBLY

(a)Remove the 18 bolts, oil pan and gasket.

NOTE: Some fluid will remain in the oil pan. Remove all pan bolts, and carefully remove the oil pan assembly.

(b)Remove the 2 magnets from oil pan.

(c)Examine particles in pan.
(1)Remove the magnets and use them to collect any steel chips. Look carefully at the chips and particles in the pan and the magnet to anticipate what type of wear you will find in the transaxle.
Steel (magnetic): bearing, gear and plate wear
Brass (non-magnetic): bearing wear

4. REMOVE VALVE BODY OIL STRAINER ASSEMBLY

(a)Remove the 3 bolts and oil strainer.

NOTE: Be careful as some fluid will come out with the oil strainer.

5. REMOVE TRANSMISSION VALVE BODY ASSEMBLY

(a)Disconnect the 4 solenoid connectors.

(b)Remove the bolt and manual detent spring.

(c)Remove the 17 bolts.

(d)Using needle-nose pliers, while disconnecting the manual valve connecting rod from the manual valve lever, remove the valve body with the manual valve together.

(e)Remove the 2 bolts (A and B bolts) and 3 solenoid valves.
(f)Remove the 3 O-rings from each of the solenoid valves.
(g)Remove the bolt (C bolt), lock plate and line pressure control valve.

Check out the diagrams (Below).

Images (Click to enlarge)

Wednesday, May 26th, 2021 AT 6:41 PM (Merged)

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