Preliminary checks
1. Drive the vehicle to warm up the transmission to normal operating temperature.
2. Check the automatic transmission fluid level.
3. Check the engine idle speed.
4. Check throttle cable adjustment and adjust if necessary
5. Check the automatic transmission selector cable.
Finding and repairing fluid leaks
6. If a leak is found, try to determine the type of fluid and the location of the leak.
7. After locating the leak, try to determine the cause of the leak. It must be repaired so that the leak does not occur again.
Leaking gaskets
8. Periodically inspect the oil pan. Check that the bolts are securely tightened and that the gasket is in good condition.
9. If a leak has been found, it is possible that the bolts are overtightened, the sealing surface of the gearbox or the gasket is damaged.
Leaking seals
10. If the gearbox oil seal is leaking, it is possible that the fluid pressure in the gearbox is too high, the vent hole is clogged, the oil seal seat is damaged or the oil seal is not installed correctly, the axle shaft surface is damaged, or the axle shaft bearings are worn.
11. Check the oil dipstick tube seal. Periodically inspect the area around the speedometer actuator or speed sensor for signs of leakage. If present, check the O-ring.
Leaks from the gearbox housing
12. If the crankcase itself is leaking, it must be repaired or replaced.
13. Check oil hose connections.
Leakage from vent tube or fluid fill tube
14. If fluid leaks from these tubes, the transmission is overfilled, coolant has entered the automatic transmission fluid, the vent is clogged, or the drain holes are clogged.