Toyota
Source-verified model
Toyota AA80E
The 8-speed automatic gearbox AA80E (TL-80SN for Lexus) produced by Aisin Co has been installed since 2007 on RWD Lexus LS460 (IS, GS460) and Toyota Land Cruiser and Crown Majesta with engines V8 from 4.6 up to 5.0 liters. The modification АА80F is used for AWD LS460. The maximum torque is up to 550 Nm. In terms of design, this transmission is related to TR-80SD (0С8).
Speeds
8
Type
AT
Drive
RWD/AWD
Max torque
550
ATF capacity (L)
11,3
ATF change (L)
3,7
ATF type
Toyota WS
Other and alternative codes of this transmission
AA 80 E
TL80SN
AA 80E
AA80-E
AA80 E
TL-80SN
TL 80 SN
TL80-SN
AA80E
TL80
MGG
TL-80SN (AA80E) 8SPD
A880E
AA80E/F
verified naming
OEM designation
source name
Common problems & symptoms
Problems and symptoms reported for this transmission, compiled from repair sources. Not a complete list.
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Torque Converter Lockup Wear
TC lock-up wear causes pump seal and bushing damage; primary source of oil contamination and overheating.
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Oil Leak Pump TC Seal
ATF leaking via pump/torque converter seal is first diagnostic signal requiring valve body cleaning and TC repair.
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Pump Bushing Degradation
Continued operation with pump seal leaks leads to pump bushing wear and potential full pump replacement.
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Lockup Solenoid SLU Failure
SLU solenoid wears first due to constant exposure to contaminated and overheated ATF from the torque converter.
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Rapid ATF Contamination
Quick ATF darkening after partial fluid change indicates active TC wear; requires immediate TC inspection.
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Main Pressure Solenoid LPC
SLT/LPC solenoid is high-risk as it routes all ATF to other solenoids; contamination accelerates its failure.
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Valve Body Contamination
Friction plate debris and contaminated ATF foul the valve body, damaging solenoids and hydraulic circuits.
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Friction Plate Wearout
Delayed TC repair leads to friction plate wear, generating debris especially harmful to AA80E solenoids and valve body.
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About this transmission
Transmission general data
The 8-speed automatic gearbox AA80E (TL-80SN for Lexus) produced by Aisin Co has been installed since 2007 on RWD Lexus LS460 (IS, GS460) and Toyota Land Cruiser and Crown Majesta with engines V8 from 4.6 up to 5.0 liters. The modification АА80F is used for AWD LS460. The maximum torque is up to 550 Nm. In terms of design, this transmission is related to TR-80SD (0С8).
Technical issues and repair guidelines
With regard to mechnical components typical problems usually occur in the bushing and the pump seal, which are the first to be affected by the torque converter (TC) lock-up wear-out and overheating. The oil leaks via the seal of pump/TC is the the first signal for diagnostics, cleaning of the valve body, and the TC repair. Further operation with such leakages may result in the necessity for the pump bushing replacement, and in some cases replacement of the pump itself.
In the electric part, the first level repair consists of the valve body cleaning and replacement of solenoids. As in many of Aisin automatic transmissions, the torque converter lock-up solenoid SLU is the first to wear out, because this solenoid operates with all contaminated and overheated oil from the worn-out torque converter. Another problematic area is the main pressure solenoid LPC (SLT), which transmits all ATF to other solenoids.
Specialists recommend to monitor closely the ATF condition in the TL-80SN transmission. In case of rapid ATF contamination after the prior partial change, it is recommended to visit the repair shop for the torque converter repair, without waiting for the friction plate wearout, that may be especially harmful for the AA80E solenoids and the valve body. It is also advisable to replace the filter in due time, and check the pan.
The design of transmission components for all RWD Aisin transmissions is considered to be "invincible", having a large structural reserve. This transmission usually operates without serious problems throughout the car lifespan. However to avoid unnecessary repair costs, car owners have to monitor the ATF state, timely visit specialists for the torque converter repair, cleaning of solenoids and the valve body.
Vehicle fitment explorer
Confirmed vehicle applications. Every row is drawn from our source-verified fitment database.
| Make | Model | Year | Drive | Engine |
|---|---|---|---|---|
| Lexus | GS 350 | 17-25 | 8 SP RWD | ALL |
| Lexus | IS 350 | 17-25 | 8 SP RWD | ALL |
| Lexus | RC 350 | 17-25 | 8 SP RWD | ALL |
Sources & Contribution
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