The Aisin AWF8G30 / AWF8G45 and Toyota UA80E / UA80F / UB80E / UB80F are related 8-speed automatic transmissions developed for transverse-engine applications. They use a torque converter with lock-up clutch and electronically controlled hydraulic operation, with different versions designed for varying torque capacities and FWD/AWD configurations.
Specification: 8-speed automatic • Aisin/Toyota • AWF8G30 / AWF8G45 / UA80E / UA80F / UB80E / UB80F • Transverse installation • FWD and AWD variants • Torque converter with lock-up clutch • Electronic-hydraulic control • Planetary gearsets • Application-specific ratios, torque capacities and calibrations.
These transmissions are used across selected Toyota, Lexus, Peugeot, Citroën, DS, Vauxhall/Opel, Fiat, Volvo and other applications. Individual variants are not necessarily interchangeable, so the VIN, complete transmission number, OEM gearbox code and individual component identification should always be confirmed before ordering replacement parts.
Common Faults
Common problems include harsh or delayed shifting, valve-body and solenoid faults, hydraulic pressure problems, torque-converter clutch issues and internal clutch wear. Symptoms can include shift flare, harsh engagement, shudder, incorrect gear ratios and transmission warning messages.
Diagnosis should include fault codes, fluid condition, adaptations, valve-body and solenoid operation, hydraulic pressure and torque-converter performance before replacing internal components.
Common Fault Codes