Transmission not working properly

CHRIS0701

MEMBER
1997 GMC JIMMY
4.3L
2WD
AUTOMATIC
250,000 MILES

The transmission was shifted into reverse and still moved forward. Afterwards the vehicle was turned off and would not restart. Now it will not shift into any gear it rolls freely in all gears the same as if it were in neutral.

Wednesday, November 11th, 2020 AT 12:00 PM

1 Reply

ASEMASTER6371

MECHANIC
52,797 POSTS

Good afternoon,

Does the gear shift feel loose? From your description, it sounds like the shift cable has failed.

I attached the procedure for you below with some pictures.

Have someone look under the truck and see if the linkage moves when you try to shift gears. I think the cable is not working.

Roy

REMOVAL PROCEDURE

1. Apply the parking brake.
2. Shift the transmission into neutral.
3. Remove the steering column filler panel.
4. Remove the door sill trim plate.
5. Remove the cowl side trim panel.
6. Remove the seat from vehicle.

ImageOpen In New TabZoom/Print

7. Remove the retainer securing the shift cable to the steering column.

Important: The removal of the shift cable from the floor shift control is similar to the removal of the shift cable from the column shift control.

8. Remove the shift cable end from the steering column shift bracket.
9. Remove the nut securing the shift cable and the clip to the pedal bracket.

ImageOpen In New TabZoom/Print

10. Remove the grommet and tape securing the shift cable to floor panel.
11. Raise and support the vehicle.

ImageOpen In New TabZoom/Print

12. Remove the retainer securing the shift cable to the transmission bracket.

ImageOpen In New TabZoom/Print

13. Squeeze the retainers while pulling the cable towards the rear of the vehicle.
14. Remove the shift cable end from the transmission control lever.
15. Remove the shift cable from the vehicle.

INSTALLATION PROCEDURE

1. Position the shift cable to the vehicle.
2. Install the retainer securing the shift cable to the transmission bracket.
3. Squeeze the retainers while pulling the cable towards the rear of the vehicle.
4. Install the shift cable end to the transmission control lever.
5. Route the shift cable through the floor panel.
6. Lower the vehicle.
7. Install the grommet and tape securing the shift cable to the floor panel.
8. Install the retainer securing the shift cable to the steering column.
9. Install the shift cable end to the steering column shift bracket.
10. Install the nut securing the shift cable and the clip to the pedal bracket.
11. Install the seat to the vehicle.
12. Install the cowl side trim panel.
13. Install the door sill trim plate.
14. Install the door sill trim plate.
15. Install the steering column filler panel.
16. Release the parking brake.
17. Test the transmission for proper operation. Adjust the shift control cable if necessary. Refer to SHIFT AND ADJUSTMENT SHIFT POSITIONS.

Images (Click to make bigger)