How did you conclude that it was a dirty valve body that is causing your shifting issues?
There was oil/water mixture in the trans. Please see the two pictures in my reply belowHow did you conclude that it was a dirty valve body that is causing your shifting issues?
Exchanged the fluid and the filter after repairing the damage.Have you completely exchanged/flushed the fluid? Usually that's all that's needed unless there are internal issues (slipping clutches, bad solenoids, etc).
The transmission is already overhauled. But I don't know what happened to the TCM after that, and why I had to replace it. Note that the one installed now is of a Chevy Cruz not a Daewoo Lacetti Premier 2009. It only shifts from 2nd to 3rd and stays on 3rd (no reverse). So what is to overhaul you mean here? The valve body? I thought it may require just cleaning.That's going to require a complete overhaul. Find yourself a good degreaser, a transmission repair manual, and get started.
The error code was P0752... sorry for not replying earlier, internet connection was down! I want to know if there's a way to see if the problem was electrical.Fresh fluid/a flush is the only real cleaning you can do without disassembling the entire trans again. Should be all that's needed if the box in itself is still good/was rebuilt correctly.
I think the TCM you put in might be incompatible with your car. What trans codes are stored?
Sounds like the solenoid itself is bad and isn't cycling.The error code was P0752... sorry for not replying earlier, internet connection was down! I want to know if there's a way to see if the problem was electrical.
I read about this error code and it's about the shift solenoid and the problem could be mechanical not electrical.