What causes the transmission failure in Audi A4?
1 Answers
The causes of transmission failure in Audi A4 are as follows: 1. Symptoms such as reverse gear failure, reverse gear impact, or reverse gear slippage. The main reasons are damage to the reverse gear clutch drum or failure of the reverse gear oil circuit inside the valve body. 2. Severe slippage and gear lock, with all gear indicators on the dashboard turning red after the failure occurs. The main reasons include aging seals, burnt friction plates, and damage to the clutch drum. 3. Severe oil leakage and abnormal noise from the front of the transmission. The main reasons are seized copper sleeves in the oil pump and loss of sliding bearing function in the torque converter neck. 4. Metal abnormal noise inside the transmission, with torque converter fault codes read by a diagnostic tool. The main reason is excessive wear of the torque converter, leading to wear of the planetary gear set inside the transmission. 5. The dashboard always displays the D gear position regardless of how the gear lever is moved. The main reason is damage to the transmission computer.