Hyundai 35DS-7 Operation Manual page 58

2) ABNORMAL NOISE CHECK LIST
No Problem
1 Noise only at neutral
2 Pump noise
T/M noise
3
Control valve noise
4
1. Gear or bearing wear inside the pump.
2.Torque converter stator wear.
3. Low oil level.
4. Gear parts of engine and T/M pump's misalignment with that of
converter housing and pump.
1. Loud noise irregularly repeats if there's contaminents in the T/M
hydraulic components.
2. Regular noise means pump defect.
1. Converter housing and pump gear misalignment with engine or T/M
2. T/M components wear or damage.
1) Gear damage.
2) Clutch plate and disk slip noise.
3) Thrust washer defect.
4) Another components wear or damage.
1. Air mixed into hydrauilc system.
1) Air leakage from the pump input port.
2. Clogged oil passage.
3. Abnormal spool movement.
3-16
Cause