Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2012 Chevrolet Malibu L4-2.4LFACTORY OEM SERVICE PROCEDURE
Transmission Position Sensor/Switch: Service and Repair
Manual Shift Detent Lever with Shaft Position Switch Assembly Replacement
Special Tools
* DT-48550 - Detent Lever Pin Remover
* DT-41229 - Manual Shaft Pin Installer
For equivalent regional tools, refer to Special Tools 6T30/6T40/6T45/6T50 - Automatic Transmission.
Removal Procedure
1. Remove the control valve body. Refer to Control Valve Body Assembly Removal 3. Control Valve Body Assembly Removal.
2. Remove the manual shaft detent lever hub pin (1) using DT-48550 - remover.
3. Remove the manual shift shaft pin (5). Discard the pin.
4. Remove the manual shaft (2).
Note:
Disconnect the actuator rod (3) from the detent lever assembly. Do not remove the actuator rod from the transmission case.
5. Remove the manual shaft detent (w/shift position switch) lever assembly (4).
Installation Procedure
Note:
Connect the actuator rod (3) to the detent lever assembly.
1. Install the manual shaft detent (w/shift position switch) lever assembly (4).
Note:
Lubricate the shaft with automatic transmission fluid to prevent damage to the manual shift shaft seal during installation.
2. Install the manual shaft (2).
3. Install the manual shaft detent lever hub pin (1) using DT-48550 - remover.
Install the manual shaft detent lever hub pin to height of (b) 7.9 mm (0.38 in).
Caution:
Use the manual shaft pin installer to install the pin at the correct height in order to properly secure the manual shaft. If you install the pin too deep, the case bore may crack.
4. Install the NEW manual shift shaft pin (5) using DT-41229 - installer. Use a NEW pin to ensure proper engagement with the case.
Inspect pin installed height is within (a) 7.2-8.2 mm (0.28-0.32 in).
5. Install the control valve body. Refer to Control Valve Body Assembly Installation 47. Control Valve Body Assembly Installation.
6. Perform the service fast learn adapt procedure.
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.