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Old 05-31-2012, 07:46 PM
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How To: Replace Gear Shift Assembly

If you have had problems with your key getting stuck in the ignition, one of the possible causes is a damaged micro-switch/rod assembly in the transmission control (commonly referred to as the shift control). If this damage has occurred, the entire shift assembly must be replaced. In this how-to, I will illustrate how to replace the shift control assembly in a 2005-2010 Cobalt with Automatic Transmission.

FYI This is only one of the possible causes of a stuck key. A damaged shift control is generally confirmed when a stuck key is associated with the ability to shift through the gears without depressing the shifter button.

Skill Level: Novice
Time Required: 45 minutes

Tools Needed:
10mm Socket
13mm Deep Well Socket (Magnetic)
Socket Extension
Forked Trim Tool ($5)
Phillips Screwdriver or Flat Blade Pick
Allen/Hex Keys
Replacement Transmission Control ($118 Dealer, P/N 15926820)

1. Engage your E-Brake and remove the trim plate surrounding the brake lever. Trim panels can be removed by grasping and pulling firmly.



2. Turn your ignition to accessory and shift to Neutral (this will allow you the necessary clearance to remove the trim). Pull up the console trim plate that surrounds your shifter, but do not yet remove it.

3. Disconnect the (2) 12 Volt adapters in the console trim plate. Disengage the connectors by pressing the black tabs, or if unable to grasp, by inserting a flat bladed tool.



4. You may now remove the console trim plate, return your car to park, and remove the key.

5. Disconnect your negative battery terminal.

6. Remove the silver shift cable retaining clip, shown in yellow. Slide a flat blade tool beneath it and gently lift to remove.



7. Remove the shift cable from the shift control assembly using a forked trim tool, taking EXTREME care to not bend the cable. The safest method I found was to place my trim tool behind (on the inside) of the cable flange and apply steady outward pressure (toward passenger seat). The flange simply slips over the edge of the notched stud when adequate pressure is applied. Do not pull from the opposite side (with the yellow rubber).





8. Pinch the black tabs (adjacent to where the retaining clip was previously held) and slide back to release the shift control cable from the assembly. The shift control cable should now be free of the assembly.



9. Using your trim tool, pop the rivet holding the wire loom to the right side of the transmission control assembly.



10. Using the 13mm deep well magnetic socket, remove the (4) mounting nuts holding the shift control to the floor. The front two nuts are circled in red. The rear two can be removed by simply maneuvering the socket into the console cavity (this is where your magnetic socket saves you from extreme aggravation).



11. With the assembly unbolted, lift it up enough to disconnect the shift lock solenoid electrical connector on the left rear side of the unit. Again, use the flat bladed tool.



12. Remove the old shift assembly from the vehicle and grab a cold Dew



13. Transfer the shift knob to the new assembly. Use your Allen key to remove the screw, which is beneath the chrome sleeve. To slide the sleeve down, the shifter must be in Neutral, which is accomplished on a removed unit by depressing the lever on the side of the unit.

14. Connect the shift lock solenoid electrical connector to the new shift control assembly.

15. Set the new shift control assembly over the (4) mounting studs, being careful that no carpet is seated beneath the assembly. It must sit level.

16. Install the (4) shift control nuts and tighten to 25 N.m, or 18 lb. ft (one turn past finger tight).

17. Slide the shift control cable locking tabs into the shift assembly until you hear them click.



18. Connect the shift control cable to the shift control assembly by sliding the cable flange over the notched stud. Press firmly to seat.

19. Reinstall the shift cable retaining clip from Step #6.

20. Pop the wire loom rivet from Step #9 into the corresponding hole on the right side of the shift assembly.

21. Reinstall the 12 Volt electrical connectors, trim panels and connect your negative battery terminal.

22. Prior to releasing E-brake, with a foot on the brake, test shift through the gears, checking for proper operation.

I hope this helps. Please provide any feedback you feel beneficial.
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Last edited by stratosproject; 06-01-2012 at 03:54 AM. Reason: Information added
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Old 05-31-2012, 08:10 PM
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Your #3, you don't need a screwdriver, you just press on the black retaining tab and pull connector out.
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Old 06-01-2012, 03:55 AM
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Edited. Kudos.
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Old 06-01-2012, 04:48 AM
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Very nice, TWM also posted a similar how to for manuals if anyone is in need. When I took mine out I had the same pool of nasty goo underneath (check pic above #13), what is that stuff?

---------- Post added at 06:48 AM ---------- Previous post was at 06:45 AM ----------

http://www.yourcobalt.com/forums/ins...stall-diy.html
Here's the link
  #5  
Old 07-07-2012, 06:24 PM
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Thanks for the info.I replaced the shifter in my 06 Cobalt last week.I went by your instructions and had no problems at all.

My problem started all of a sudden,I couldn't remove the key without pushing the button under the steering column.I could also put the shifter in any gear while the engine was off.

The shifter cost me 129.00 at a local dealership.I was suprised because I thought it would cost a lot more even though it is all made of plastic almost.

Thanks again.

Lots of good info on this forum...
  #6  
Old 07-07-2012, 07:02 PM
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Is this covered by a Warranty?

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  #7  
Old 09-11-2012, 04:28 PM
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Shifter Problem

Chevy should have recalled the vehicles to fix this problem. It is a safety issue.

I find the engineering of the shifter to be sub par. To have a simple bar, disable the safety features of the shifter, as well as stop you from removing the key, is a serious design deficiency in my opinion.

I find GM's response to not feel this is an important issue to be a real concern for the quality they build into thier cars.
  #8  
Old 01-09-2013, 02:26 PM
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Thanks for the how to you did an awesome job. My daughter was taking her backpack out of her cobalt and the strap hooked on the shifter. Her car started coasting backwards down our driveway just about running over her with the door open. Needless to say a tree caught the door peeling it against the fender. Thanks GM for another poorly built car that could have killed my daughter.
  #9  
Old 01-09-2013, 02:36 PM
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In all honesty shifters are designed to lock in park and not be able to move with out the key in the ignition, foot on the brake, and button depressed. Are you positive she didn't leave it in drive or something like that?
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  #10  
Old 01-09-2013, 02:44 PM
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yea unless my foot is on the brake of my auto it wont shift even if i have the button down on the shifter,idk if its just a defect on 05-06 models but mine is a 07 and i cant see it being a defect on years after mine,so maybe its a sensor or something that goes bad for that saftey brake feature
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