Transmission families, fluids and failure patterns
A structured reference for automatic, DSG, CVT and dual-clutch transmissions with service notes and related fault codes.
Transmission fluid, symptoms and related codes
This section maps automatic, dual-clutch and CVT transmission families to fluid type, service notes, common failures and OBD2 codes. For harsh shifts, slipping, delayed engagement, overheating or P0700/P0715/P0720, confirm the exact transmission family first.
ZF 8HP
Torque-converter automatic, 8-speed. Applications: BMW, Audi, Jaguar.
Volkswagen Group DQ250 DSG
Wet dual-clutch transmission, 6-speed. Applications: Volkswagen GTI, Audi A3, Skoda performance models.
Ford/Getrag DPS6 PowerShift
Dry dual-clutch transmission, 6-speed. Applications: Ford Focus, Ford Fiesta.
Aisin TF-80 / AF40
Torque-converter automatic, 6-speed. Applications: Volvo, Saab, Opel/Vauxhall.
Jatco CVT7/CVT8 family
Continuously variable transmission, CVT. Applications: Nissan, Mitsubishi, Renault alliance vehicles.
Transmission checks before replacement
Transmission symptoms are often affected by fluid condition, temperature, electrical faults and software behavior. A harsh shift or slip does not always mean the transmission is mechanically failed, especially when related sensor or solenoid codes are present.
Identify the transmission family first, then check fluid type, level procedure, service history, leak evidence, live data and related DTCs. This helps separate maintenance issues from control circuit, speed sensor or internal pressure faults.
Verify exact transmission family before buying fluid.
Check leaks and temperature before judging shift quality.
Use related P07xx codes to guide electrical tests.