Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Fluid Pressure Sensor/Switch: Service and Repair


1. Drain and remove oil pan and remove filter and gasket.
2. Disconnect electrical connectors at valve body.
3. Remove detent spring and roller assembly from valve body and remove valve body to case bolts.
4. Remove valve body assembly while disconnecting manual control valve link from range selector inner lever and removing throttle lever bracket from T.V. link.
5. Reverse procedure to install. Torque bolts to 8 ft. lbs. and replenish fluid.