What are the causes of damage to the automatic transmission oil pump

The reasons for the damage of automatic transmission oil pump are as follows:

1. Tooth fracture of oil pump (mainly due to foreign body or fatigue);

2. Transmission shaft of oil pump is damaged and bent (injured during fatigue or disassembly and poor material);

3, gear clearance is too small, oil too dirty;

4, pump wear (impurities in the oil, wear surface is not smooth);

5, oil pump leakage (sealing ring damage).