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What are the common symptoms of transmission failure?

1 Answers

GrantFitz

07/29/25 6:57pm

Here are common transmission failures: 1. Oil leakage: Oil seeps from the transmission housing or oil pan, which may be caused by aging seals leading to poor sealing, or manufacturing defects resulting in sand holes in the housing. 2. Engine stalling when shifting into gear: Stalling when shifting into D or R may be caused by a damaged lock-up solenoid valve or a stuck lock-up control valve. 3. Locked gear: Incorrect input or output signals from the transmission, or issues with components or circuits, sometimes due to communication problems between the transmission computer and other system computers. 4. No response when shifting into gear: The vehicle does not move after shifting into D or R and releasing the brake. This is often caused by damage to the input shaft or reverse clutch, or failure of the D/R brake. 5. Gear shift shock or jerking during driving is also a common symptom of automatic transmission failure, possibly due to dirty transmission fluid causing valve body sticking. 6. Transmission slipping during driving, lack of acceleration, engine revving without speed increase, and overall vehicle weakness are mostly caused by burnt clutch plates. 7. Water in transmission: External factors causing water to enter the transmission, leading to abnormal operation, possibly due to oil mixing with coolant or water entering through the transmission vent cap. 8. Abnormal noise: Unusual sounds from the transmission area during driving are often caused by worn parts or improper transmission installation.

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