Update.
Cut the wiring for the 1-2 solenoid at the computer and the end of the vehicle side of the harness.
No change.
Verified that the computer has bat. voltage between the E and the computer side of the cut when key on and in PRNod and 1st.
Voltage drops to 0 when it is in Manual selected...
Couple more things I thought about.
Manual shifting does not change anything.
At 55 when slowing down and I shift from OD to 3rd the engine rpm's go us slightly, so I think the torque converter clutch is working correctly.
Thanks
Hush
Been fighting a problem with my G20 van (yes it is my work truck).
Looking for any help or advice anyone can give me.
94 G20 5.0 4l60e
Got a rebuilt trans supposed to come with all the newest TSB'd item installed.
5 year warranty.
Installed the trans and took it for a test drive.
No 1st or...