Contents: Preliminary checks ⤓ Finding and eliminating fluid leaks ⤓ Leaking gaskets ⤓ Leaking seals ⤓ Gearbox housing leaks ⤓ Leak from vent tube or fluid fill…⤓
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 the throttle cable adjustment and adjust it if necessary
5. Check the automatic transmission selector cable.
Finding and eliminating fluid leaks
6. If a leak is detected, try to determine the type of fluid and the location of the leak.
7. Once the leak has been located, try to determine the cause of the leak. This must be eliminated to prevent the leak from occurring again.
Leaking gaskets
8. Inspect the oil pan periodically. Check that the bolts are securely tightened and the gasket is in good condition.
9. If a leak is detected, the bolts may be too tight, the transmission sealing surface or gasket may be damaged.
Leaking seals
10. If the transmission oil seal is leaking, it is possible that the fluid pressure in the transmission 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 or speed sensor drive for signs of leakage. If present, check the sealing ring.
Gearbox housing leaks
12. If the crankcase itself is leaking, it must be repaired or replaced.
13. Check the oil hose connections.
Leak from vent tube or fluid fill tube
14. If fluid is leaking from these tubes, the transmission is overfilled, coolant has entered the automatic transmission fluid, the vent is clogged, or the drain holes are plugged.