Hyundai/Kia A8LR1 8-Speed Automatic Transaxle (AWD) · Hyundai / Kia · Expert rebuild service since 1987. Lifetime warranty. Free diagnostic.
2015–2021 Kia K900 (3.8L), 2015–2021 Hyundai Genesis G90 (early 3.8L), 2014–2020 Hyundai Equus
| Configuration | 8-speed automatic RWD/AWD transmission (rear-wheel drive Hyundai/Kia flagship) |
|---|---|
| Gear Ratios | 1st 4.71:1 · 2nd 3.14:1 · 3rd 2.11:1 · 4th 1.67:1 · 5th 1.29:1 · 6th 1.00:1 · 7th 0.84:1 · 8th 0.67:1 · Rev 3.40:1 |
| Fluid Type | Hyundai/Kia SP-IV-RR ATF |
| Fluid Capacity | 9.8 qts total, 4.8 qts service refill |
The A8LR1 solenoid body fails from heat cycling in V8 Genesis and K900 applications, causing limp mode and harsh shifts.
Symptoms: Limp mode, DTC codes, erratic 8-speed shift pattern, MIL on
V8 heat loads in Equus and K900 applications accelerate TCC wear on higher-mileage units.
Symptoms: Highway shudder, DTC P0740, vibration at 55–80 mph
The TCM develops software issues or electrical faults on high-mileage units, causing erratic shift behavior.
Symptoms: Random shift quality issues, DTC codes appearing intermittently, 8-speed hunting
A8LR1 rebuild replaces solenoid body, all clutch packs, torque converter, and all seals. TCM is checked and updated if needed. SP-IV-RR ATF used.
Hyundai/Kia SP-IV-RR ATF (RWD specification) every 40,000 miles. This is different from SP-IV-M used in FWD models. Verify fluid specification before any service on rear-wheel-drive Hyundai/Kia flagships.
Kia K900, Hyundai Genesis G90 (early), and Hyundai Equus with 8-speed automatic.
SP-IV-M is for FWD/AWD transaxle applications; SP-IV-RR is for rear-wheel-drive longitudinal transmissions. They are not interchangeable.
A full rebuild ranges $2,300–$3,000 at Chicago Transmission.
Yes — it's a robust unit in flagship applications. Solenoid body wear is the primary failure mode and is addressed in rebuild.
Hyundai/Kia SP-IV-RR ATF for the RWD longitudinal application.
Free diagnostic, written estimate, lifetime warranty. Chicago's A8LR1 rebuild specialists since 1987.
