GMC 19168318 Transmission Asm,Auto (Goodwrench Remanufacture)(6Kkp)

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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.

After lowering the vehicle and reinstalling components, you should fill the transmission with the specified fluid, run the engine, and check for fluid leaks to ensure proper transmission operation.

During the disassembly of the transmission, it is important to make careful notes of how each piece comes off, where it fits in relation to other pieces, and what holds it in place. This will make reassembly easier.