Why is my 4L80E stuck in 2nd gear?
4L80E stuck with only 2nd gear and reverse. -Will manually shift into 1st, but in 2nd, D, and OD starts and stays in 2nd. -Checked for power at the ECM and checked grounds. -Swapped ECM as I had a spare laying around and it didn’t fix it. ideas? Vehicle? Did you check the fuses? Check for power at trans? Power was good.
What should I do if my GM converter lock up?
NEVER run the vehicle in gear when supported only with a jack. Chock the drive wheels and apply the parking brake. In addition, some of the tests (test #11 and 12) require the transmission be opened and the valves are physically inspected. I do not recommend that you do this.
What happens if you lose the Trans on a GM Truck?
In the mid-late 90’s the GM trucks had a common ignition switch failure that would put the trans in default with no codes, sometimes intermittently. If you lose the A and B circuit wires (GRD) then you also lose shifting on the respective circuit.
Why is my GMC Sierra 1500 in 3rd gear?
Pulled the harness off the tranny to put it into LIMP mode and it starts out in 3rd gear no problem. So 3rd gear is there.. Shift solenoids A and B have to be good else no 1st or 2nd. No errors codes.
4L80E stuck with only 2nd gear and reverse. -Will manually shift into 1st, but in 2nd, D, and OD starts and stays in 2nd. -Checked for power at the ECM and checked grounds. -Swapped ECM as I had a spare laying around and it didn’t fix it. ideas? Vehicle? Did you check the fuses? Check for power at trans? Power was good.
Why is my GMC Sierra not shifting past 2nd?
No change then changed transmission. Still same thing that black plastic box on the side was cracked I just changed it still nothing. One fella said maybe change get out that cluster that plugs into the box. I’m at end of my rope. It’s Christmas and im getting really bummed where is there a fuse or relay if anybody can help please. Kathy in tx
What’s the problem with my GMC Sierra 1500?
Hi everyone I’m having the same problem I have a 1997 Chevy Tahoe LT 5.7 Vortec V8 2WD it’s stays in first gear and it don’t go into reverse but the lights go on when you put in reverse and no Check Engine light on anybody know what it could be the problem Hey! I have a 94 GMC suburban. Trans was leaking so I put in some stop leak.