Nissan 31020-3VX6D Automatic Transaxle

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No, it is not impossible for a more experienced mechanic to overhaul the transmission if they have the necessary tools and approach the job in a step-by-step manner.

When refitting the transmission, follow the reverse of the removal procedure. Remember to: Replace the clutch concentric slave cylinder. Apply a small amount of high melting-point grease to the transmission input shaft splines. Ensure the locating dowels are correctly positioned. Insert the transmission-to-engine bolts into their original locations. Tighten all nuts and bolts to the specified torque. Refit the driveshafts, front suspension subframe, and bleed the clutch system. Finally, refit the gearchange cables and check their operation, and refill the transmission with the specified lubricant.

The first step is to take the car on a journey of sufficient length to warm the engine/transmission up to normal operating temperature.

Remove both driveshafts, disconnect wiring connectors from various components around the engine (labeling them if necessary), disconnect all vacuum hoses, remove the air cleaner assembly, disconnect fuel feed and return hoses, and disconnect relevant electrical connectors.