Sierra Classic 2500 4WD V8-6.0L (2007)
Fluid Pressure Sensor/Switch: Service and Repair
4L80-E/4L85-E - Automatic Transmission
Valve Body and Pressure Switch Replacement
Tools Required
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J 25025-5 Dial Indicator Mounting Post - M6 X 1.00
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J 36850 Transjel(r) Lubricant
Removal Procedure
1. Ensure that removal of the valve body is necessary before proceeding.
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Important:
The following components can be serviced without removing the valve body:
The 2-3 solenoid (1)
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The internal wiring harness (2)
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The 1-2 shift solenoid (3)
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The transmission fluid temperature sensor (4)
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The transmission fluid pressure manual valve position switch (5)
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The pressure control solenoid (6)
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The torque converter clutch pulse width modulation (TCC PWM) solenoid (7)
2. Remove the fluid level indicator.
3. Remove the transmission filter. Refer to Automatic Transmission Fluid and Filter Replacement.
4. Disconnect the internal wire harness from the transmission fluid pressure (TFP) manual valve position switch.
Important: Use care not to loose the 5 O-rings that are located between the TFP manual valve position switch and the valve body.
5. Remove the valve body bolts (1) that retain the (TFP) manual valve position switch (2).
6. Remove the TFP manual valve position switch.
7. Disconnect the internal wiring harness electrical connectors from the remaining valve body electrical components.
