GMC 15691903 Transmission Assembly, Man *Trans. Kits

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After securing the transmission in place, you should reinstall the dipstick tube, starter motor, vacuum hose(s) (if equipped), shift and TV linkage or cable, wire harness connectors, torque converter cover, driveshaft(s), speedometer cable, and exhaust system components.

Before taking the transmission apart for repair, it can be helpful to have some idea of what area of the transmission is malfunctioning. Certain problems can be closely tied to specific areas, making component examination and replacement easier.

Support the engine and transmission separately, with the latter supported by a special jack. Remove the nuts from the crossmember bolts, raise the transmission slightly, and remove the crossmember. On heavy-duty (cast iron case) transmission models, remove the transmission-to-clutch housing bolts; on normal-duty models, remove the transmission-to-engine bolts. Ensure all wires are disconnected, and then move the transmission and jack toward the rear of the vehicle until the transmission input shaft is clear of the clutch or clutch housing. Lower the transmission, taking care not to depress the clutch pedal while it's out.

Before taking the transmission apart for repair, it can be helpful to have some idea of what area of the transmission is malfunctioning. Certain problems can be closely tied to specific areas, making component examination and replacement easier.

Inspect the clutch components during removal. For installation, if the clutch components were removed, install them, and for heavy-duty four-speed models, attach the clutch housing if it was removed.

During transmission removal, you should disconnect and plug the transmission fluid cooler lines. When installing the transmission, reconnect and secure the transmission fluid cooler lines, ensuring a secure connection.