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A604 Transaxle
1. Worn or faulty underdrive clutch.2. Damaged clutch seals.
3. Worn or damaged accumulator seal rings.
4. Incorrect gearshift control linkage adjustment.
5. Worn or broken reaction shaft support seal rings.
6. Worn or damaged input shaft seal rings.
7. Valve body malfunction or leaking.
8. Hydraulic pressures too low.
9. Faulty oil pump.
10. Clogged oil filter.
11. Low fluid level.
12. Aerated fluid.
13. Engine idle speed too low.