4L60E 3rd gear only after 2 attempts to rebuild

I took it in and they scanned and found code 81 Everything else is functioning, this is the only code. They think it is either the shift solenoids or the PCM (computer) They have a schafeer? shifter which will overide the computer. $48 to do this.

So I did previously verify the solenoids were not shorted or open and the valve clicked when power was applied and the check valve worked, (blows thru one way not the other)

So for code 81, what is the best thing to do ?

I think I found the problem. One of the shift solenoids had an open coil, so this would prevent it from working. Still, I thought moving the lever manually would allow the trans to shift into first, but maybe not.

Let me know if it doesn't work I'll send you a test you can try.

Hey, sdowney, that schafeer? shifter sounds interesting--esp. for installing tpi engines w/4l60e trannies in older rods(& I have one.). Please tell me more at samdanielsatcharterdotnet(pls. make necessary changes.). Sorry I can't help w/your trans problem. Pls. post back/email as to what you find. Thanks, s

Well its fixed!! The shift solenoid was bad, If you have a code 81, the 2-3 shift solenoid will cause you to stay in max line pressure, no TCC lockup and

That shaffer shifter I wont get to see since it is working. You could ask them about it at B & W transmission Hampton VA. They described it as a plugin to the transmission port and the device controls and sets the shift points, diagnostic tests etc... right inside the car as you drive around. Unplug the car computer and plug this in. But I am assuming this is a diagnostic test device.