Ok guys so i have an 07 is250 rwd. I took my car to replace the differential fluid and was informed that the transmission pan gasket is leaking. So i want to drop the pan and replace the fluid. Is there a particular ws toyota fluid to use? Also i see autozone has the filter but i dont kno if aftermarket and oem are the same. Also pan gasket as well. Only issue is ive been getting a p2757 ocassionally and may as well replace that part while everything is off. But i have not seen an exact location for where the lockup solenoid is. I saw a u tube video of it being under the transmission filter but not sure. I have a lockup solenoid from a parts car and was wondering why they have different numbers on them.

You see the solenoids have numbers on them and when i looked online at a few. The numbers are not the same. So im wondering if i were to take one from my car would they match?? Anyone whos done this please chime in. Car drives fine through all gears ect. I pulled these from a parts car myself.

 

Although you have the parts and the pans is seeping, I'd highly recommend you test the old solenoid via ohms, and switching when 12v is applied. A lot of people swap this for this problem and have no resolution. The point being the part is no bad, the diagnosis is bad.

In short, the ECU and transmission TCU send a command to enable lockup, when it doesn't change state by going into lockup, (warm, over 44mph), it throws this code. It is ONLY REPORTING THE LAST COMMAND GIVEN which is not an actual diagnosis.

Point - if the solenoid tests GOOD, it is something else.
GL

 

Ok i will get the part tested once i remove it. I also have a spare ecu for this car if you mean the tcu is sending a signal for lockup ect. It is going into lockup. I believe that 2757 is torque converter pressure control stuck off.