4L60-E - Automatic Transmission

Valve Body and Pressure Switch Replacement

Removal Procedure






1. Ensure that removal of the valve body is necessary before proceeding.

Important: The following components can be serviced without removing the valve body from the transmission:
- The torque converter clutch solenoid (1)
- The pressure control solenoid (2)
- The internal wiring harness (3)
- The 2-3 shift solenoid (4)
- The 1-2 shift solenoid (5)
- The transmission fluid pressure manual valve position switch (6)
- The 3-2 shift solenoid (7)
- The torque converter clutch pulse width modulation (TCC PWM) solenoid (8)

2. Remove the fluid level indicator.
3. Remove the oil pan, gasket, and filter. Refer to Automatic Transmission Fluid and Filter Replacement.






4. Disconnect the internal wiring harness electrical connectors from the following components:
- The transmission fluid pressure manual valve position switch (1)
- The 1-2 shift solenoid (2)
- The 2-3 shift solenoid (3)
- The pressure control solenoid (4)
- The TCC PWM solenoid (5)
- The 3-2 shift solenoid (6)






5. Remove the fluid indicator stop bracket bolt (2).
6. Remove the fluid indicator bracket (1).






7. Remove the TCC PWM solenoid retainer (2) with a small screwdriver. Rotate the solenoid (1) in the bore, if necessary, until the flat part of the retainer (2) is visible.
8. Remove the TCC PWM solenoid (1) in order to access the TCC solenoid retaining bolts.






9. Remove the TCC solenoid retaining bolts.






10. Remove the TCC solenoid (with O-ring seal) and wiring harness from the control valve body.
11. Reposition the harness to the side of the transmission case.






12. Remove the control valve body bolts which retain the transmission fluid pressure switch to the control valve body.
13. Remove the transmission fluid pressure switch.






14. Inspect the transmission fluid pressure switch for damage or debris.






15. Remove the manual detent spring retaining bolt.
16. Remove the manual detent spring.
17. Inspect the manual detent spring for cracks or damage.

Important: Keep the control valve body level when lowering it from the vehicle. This will prevent the loss of checkballs located in the control valve body passages.

18. Remove the remaining control valve body bolts.






19. Carefully begin to lower the control valve body down from the transmission case while simultaneously disconnecting the manual valve link.






20. Remove the seven valve body checkballs.






21. Remove the accumulator cove bolts (58, 59).
22. Remove the 1-2 accumulator cover and pin assembly (57).






23. Remove the spacer plate support bolts (77).
24. Remove the spacer plate support (53).






25. Remove the valve body gasket (52), the valve body spacer plate (48), and the case gasket (47).

Installation Procedure






1. Install a NEW valve body gasket (52), the valve body spacer plate (48) and a NEW case gasket (47).

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.






2. Install the spacer plate support (53) and bolts (77).







3. Install the 1-2 accumulator cover and pin assembly (57).
4. Install the 1-2 accumulator cover bolts (58, 59). Tighten the bolts to 10 Nm (89 lb in).






5. Install the seven checkballs in the valve body.






6. Install the control valve body to the transmission case while simultaneously connecting the manual valve link to the manual valve.






7. Verify that the manual valve link (3) is installed properly to the inside detent lever (1) and the manual valve (2).






8. Install one bolt (M6 X 1.0 X 47.5) hand tight in the center (1) of the valve body to hold it in place.






Important: When installing bolts throughout this procedure, be sure to use the correct bolt size and length in the correct location as specified.

9. Do not install the transmission fluid indicator stop bracket and bolt at this time.
- Install but do not tighten the control valve body bolts which retain only the valve body directly.
- Each numbered bolt location corresponds to a specific bolt size and length, as indicated by the following:
- M6 X 1.0 X 65.0 (1)
- M6 X 1.0 X 54.4 (2)
- M6 X 1.0 X 47.5 (3)
- M6 X 1.0 X 35.0 (4)
- M8 X 1.0 X 20.0 (5)
- M6 X 1.0 X 12.0 (6)
- M6 X 1.0 X 18.0 (7)






10. Install the manual detent spring.
11. Install but do not tighten the manual detent spring retaining bolt.






12. Install the transmission fluid pressure switch.
13. Install but do not tighten the control valve body bolts which retain the transmission fluid pressure switch to the control valve body.

Notice: Torque valve body bolts in a spiral pattern starting from the center. If the bolts are torqued at random, valve bores may be distorted and inhibit valve operation.






14. Tighten the control valve body bolts in a spiral pattern starting from the center, as indicated by the arrows. Tighten the control valve body bolts (in sequence) to 11 Nm (97 lb in).






15. Ensure that the manual detent spring is aligned properly with the detent lever. Tighten the manual detent spring bolt to 31 Nm (23 lb ft).






16. Install the TCC solenoid with a new O-ring seal to the valve body.






17. Install the TCC solenoid bolts. Tighten the TCC solenoid retaining bolts to 11 Nm (97 lb in).






18. Install the internal wiring harness to the valve body. The internal wiring harness has a tab (1) on the edge of the conduit.






19. Place the tab between the valve body and the pressure switch in the location shown (2). Press the harness into position on the valve body bolt bosses (1, 3).






20. Install the TCC PWM solenoid (1) to the control valve body.
21. Install the TCC PWM solenoid retainer (2).






22. Install the transmission fluid indicator stop bracket (1) and bolt (2). Tighten the transmission fluid indicator stop bracket bolt to 11 Nm (97 lb in).






23. Connect the internal wiring harness electrical connectors to the following components:
- The transmission fluid pressure manual valve position switch (1)
- The 1-2 shift solenoid (2)
- The 2-3 shift solenoid (3)
- The pressure control solenoid (4)
- The TCC PWM solenoid (5)
- The 3-2 shift solenoid (6)
24. Install the transmission oil pan and filter. Refer to Automatic Transmission Fluid and Filter Replacement.
25. Fill the transmission to the proper level with DEXRON� VI transmission fluid. Refer to Transmission Fluid Check.

Important: It is recommended that the transmission adaptive pressure (TAP) information be reset.
- Resetting the TAP values using a scan tool will erase all learned values in all cells. As a result, the ECM, PCM or TCM will need to relearn the TAP values. Transmission performance may be affected as new TAP values are learned.

26. Reset the TAP values. Refer to Adapt Function.