Why Do 4S Shops Only Use Gravity Method for Transmission Fluid Change?
1 Answers
Because the gravity method is simple and convenient to operate, and the price is relatively cheaper. When using the gravity method, you only need to unscrew the drain bolt of the transmission oil pan. The machine circulation method can change the transmission fluid more thoroughly, but it is also more expensive. However, the gravity method cannot completely drain the old fluid from the transmission, as it can only remove 60% to 70% of the transmission fluid. The following are common transmission faults: 1. Oil leakage: Oil seeps out from the transmission housing or oil pan, which may be caused by aging seals leading to poor sealing, or poor manufacturing processes resulting in pinholes in the housing. 2. Engine stalling when shifting into gear: When shifting into D or R, the engine stalls. This fault 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 the components themselves or their circuits, may cause this. Sometimes, communication problems between the transmission computer and other system computers can also lead to this issue. 4. No response when shifting into gear: After shifting into D or R and releasing the brake, the vehicle does not move. This is often caused by damage to the input shaft or reverse clutch, or damage to the D/R brake. 5. Abnormal noise: During driving, there is abnormal noise from the transmission area. This phenomenon is mostly caused by worn parts or improper installation of the transmission.
