Hello all. New member and first time posting. I looked around using the search and didn't find too much about this but i'm hoping I can find a fix. Car has about 100,200 on stock engine, tranny. No weird problems before this. Just driving on highway about 60 and realized it wasn't shifting into that 4th gear and shortly after I realized it the check engine light came on. It gave me the error code P0756 (shift solenoid B Performance/ stuck off). Deleted it off but it'll come back every time now. What causes this? Can I fix this? Thought it may have been throttle position sensor because car did stall on me twice after getting off highway, could only move after manually putting into first. (Rpms were also bouncing but we have already changed it out with a new one) This threw the code P0742 (torque converter clutch circuit stuck on) but after deleting it, it hasn't come back. Fluid is full, bright red.
Really hope I don't have to replace transmission as we got this car from a lot and still paying payments...
Any help would be greatly appreciated.
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Ok this is how we got it fixed (2/14/2017)
Upon pulling the pan there was no filter installed, normal clutch wear.
Side cover was pulled at least twice, be careful, if the metal gasket falls apart just order another and save yourself the headache.
We took out the entire valve body and cleaned it thoroughly. The problem was that normal clutch wear had plugged up one of the orifices and this wouldn't allow the plungers to move. The solenoid screens where also plugged up but I had already ordered new ones.
Everything was cleaned nicely and reinstalled. Somehow during the install we messed up the shifter cable so be cautious with that. Now it shifts smoothly and much faster than it ever did before. My 2-3 shift is very very rough still but it takes hold instantly. At least the transmission shifts haha. This is in no way a how to guide exc. Just some summed up info in how we fixed it. Read through the posts to get more info I probably missed. Definitely could not have done it without the help of the senior members who provided some helpful tips!
