Mobil Automatic Transmission Fluid ATF 3309 — 1 Quart (Pack of 12), Synthetic JWS 3309/GM 9986195

Mobil 1 ATF 3309 is a high-performance automatic transmission fluid formulated for slip-controlled lock‑up transmissions that require JWS 3309, GM 9986195, or equivalent Toyota T‑IV/T4/T‑III/T3 specifications.

Designed as a synthetic-based transmission lubricant, Mobil 1 ATF 3309 delivers stable viscosity, controlled friction, and strong oxidation resistance to help transmissions shift smoothly and resist wear under a variety of driving conditions. It’s intended for vehicles that explicitly call for JWS 3309 or the listed OEM approvals—always confirm your owner's manual before use.

How does Mobil 1 ATF 3309 affect shift quality and drivability?

This fluid is engineered to maintain consistent friction characteristics across normal operating temperatures, promoting smooth gear changes and quiet operation. Its formulation minimizes transmission shudder in compatible systems and supports predictable engagement of torque converters and lock‑up clutches.

• Stable friction performance for smooth, predictable shifts
• Helps reduce transmission shudder in approved vehicles
• Low-foaming chemistry for consistent hydraulic control

Which vehicles and specifications is this ATF compatible with?

Mobil 1 ATF 3309 meets the JWS 3309 performance level and is suitable where GM 9986195 is specified. It’s also acceptable for service-fill situations calling for Toyota T‑IV/T4 and some T‑III/T3 fluids. Always check the vehicle manufacturer’s fluid specification before filling.

• Meets JWS 3309 and GM 9986195 requirements
• Compatible for service fill with Toyota T‑IV/T4 and certain T‑III/T3 calls
• Intended for slip‑controlled lock‑up automatic transmissions

What protection and longevity benefits can I expect?

The additive package and synthetic base provide excellent oxidation resistance and wear control, which helps extend both fluid and transmission life under normal service. The formulation also resists viscosity breakdown in high‑temperature conditions and thickening at cold starts to preserve lubrication performance.

• High viscosity index for temperature stability
• Oxidation resistance extends fluid service life
• Wear inhibitors help protect transmission components

How should I maintain my transmission when using this fluid?

Check transmission fluid level regularly and replace the fluid at intervals recommended by your vehicle maker. Vehicles driven in severe conditions—towing, heavy traffic, or extreme heat—may require more frequent fluid changes; follow manufacturer advice for service schedules.

• Refer to the owner’s manual for correct fill and change intervals
• Inspect fluid level and condition periodically
• Consider shorter service intervals under severe driving conditions

Who is this for: Mobil 1 ATF 3309 is intended for owners and technicians of vehicles that specify JWS 3309, GM 9986195, or compatible Toyota T‑IV/T4/T‑III/T3 fluids, and for anyone seeking a synthetic-based ATF that emphasizes stable friction, oxidation resistance, and wear protection in slip‑controlled lock‑up automatic transmissions.