Manual Transmission and Clutch

Manual Transmission and Clutch
This vehicle uses 3 manual transmissions:
^ T5OD is used with the 4.0L engine.
^ TR3650 is used with the 4.6L engine.
^ T6060 is used with the 5.4L engine.

The manual transmission has a tag to identify assemblies for repair purposes.

The purpose of the clutch is to connect and disconnect a manually operated transmission and the remainder of the driveline system from the engine.

This allows starting and stopping the vehicle, shifting and changing speeds that correspond to the engine speed through gear reductions.

The clutch operating mechanism consists of these components:
^ Flywheel
^ Clutch disc
^ Clutch pressure plate
^ Clutch release bearing
^ Clutch master cylinder
^ Clutch slave cylinder

The clutch master cylinder transmits fluid pressure to the clutch slave cylinder, which in turn moves the clutch release bearing. The clutch hydraulic system uses brake fluid and shares a reservoir with the brake system. The clutch with the 4.0L or 4.6L engine is a single-plate, dry-friction disc with a diaphragm-style spring pressure plate. The clutch disc has frictional material where it contacts the flywheel and the clutch pressure plate. The clutch pressure plate applies pressure to the clutch disc, holding it tightly against the surface of the flywheel. The 5.4L clutch is a dual disc clutch and pressure plate that is serviced as an assembly.

In the ENGAGED position, the clutch pressure plate diaphragm spring holds the clutch pressure plate against the clutch disc, so that the engine torque is transmitted to the input shaft. When the clutch is depressed, movement is transmitted through the clutch hydraulic system, which actuates the clutch release bearing. The clutch release bearing pushes on the spring center toward the flywheel. The diaphragm spring pivots at the fulcrum, relieving the load on the clutch pressure plate. Steel spring straps riveted in the clutch pressure plate cover pull the clutch pressure plate from the clutch disc, disengaging the engine torque from the transmission.