2026-09-15
Lexus IS 250/350 6AT Gearbox Service & ATF Change Malaysia
The IS 250/350 6-speed automatic gearbox (AB60F) is very reliable when ATF is changed at 20,000 km intervals using Toyota Genuine WS fluid (3.6L). Using non-Toyota ATF or extended change intervals causes delayed shifts and eventual clutch failure. Drain-and-fill service costs at an independent specialist. The IS 300h eCVT service (Toyota CVTF WS) should be done every 20,000 km.
Lexus IS Gearbox / Transmission Service
- IS 200t/250/350: 6-speed automatic (A960E/AA80E) — Toyota WS ATF; change at 20,000 km intervals, not 'lifetime fill'
- IS 300h: eCVT (no conventional gearbox) — no ATF oil change needed for the eCVT; CVT has no conventional gear to service
- Transmission flush vs drain-and-fill: drain-and-fill (partial change) is safer for sealed transmissions; full flush not recommended unless trans has slipping issues
- Gear shifting issues: if IS shifts harshly or hunts between gears — check ATF condition first; worn ATF is often the cause