2025 Ford Transit Fluid Type Specs

Quick Reference

Fluid	Type/Spec	Capacity
Engine Oil	SAE 5W-30 Full Synthetic (WSS-M2C961-A1)	Varies by engine, confirm in owner's manual
Engine Coolant	Motorcraft Yellow Antifreeze/Coolant (WSS-M97B57-A2)	Varies by engine and powertrain configuration, confirm in owner's manual
Transmission Fluid	MERCON ULV Automatic Transmission Fluid	Varies, confirm in owner's manual
Transfer Case Fluid (AWD models)	MERCON ULV Automatic Transmission Fluid	Varies, confirm in owner's manual
Front Differential Fluid (AWD models)	SAE 75W-85 Hypoid Gear Lubricant	Varies, confirm in owner's manual
Rear Differential Fluid	SAE 75W-85 Hypoid Gear Lubricant (WSS-M2C942-A)	Varies, confirm in owner's manual
Brake Fluid	DOT 4 LV High Performance Brake Fluid	Fill to MAX line on reservoir
Power Steering Fluid	N/A (Electric Power-Assisted Steering)	N/A
Washer Fluid	-30°F Windshield Washer Fluid	~1 gallon / 4 liters
Diesel Exhaust Fluid (DEF)	ISO 22241	Varies by tank size

Engine Oil

The 2025 Ford Transit is factory-filled with SAE 5W-30 Full Synthetic motor oil meeting Ford's WSS-M2C961-A1 specification. This is a high-quality oil designed for modern gasoline direct-injection (GDI) and turbocharged GDI engines. It provides excellent protection against engine wear, sludge, and varnish, and helps to improve fuel economy. For the 3.5L EcoBoost V6, it is especially important to use an oil meeting this specification to prevent turbocharger deposits and ensure long service life. For diesel models, refer to your owner's manual for the specific oil requirements, which will likely be a different viscosity and specification to meet API CK-4 standards.

Engine Coolant

Ford specifies the use of Motorcraft Yellow Antifreeze/Coolant, which is an ethylene glycol-based organic acid technology (OAT) coolant. This coolant is pre-diluted 50/50 with deionized water and should not be mixed with other coolant types or colors. Mixing coolants can cause them to gel, leading to blockages in the cooling system and potential engine damage. The cooling system capacity varies depending on the engine and powertrain configuration, so it is important to consult your owner's manual for the correct capacity.

Transmission Fluid

The 10-speed automatic transmission in the 2025 Ford Transit requires MERCON ULV (Ultra-Low Viscosity) automatic transmission fluid. This is a fully synthetic fluid that is designed for use in modern, high-efficiency transmissions. It provides excellent shifting performance and durability. Do not use any other type of transmission fluid, as this can cause damage to the transmission.

Transfer Case Fluid (AWD models)

For All-Wheel Drive (AWD) models, the transfer case also uses MERCON ULV automatic transmission fluid. This ensures proper lubrication and operation of the transfer case clutches and gears. As with the transmission, it is critical to only use the specified fluid.

Front and Rear Differential Fluid

The front and rear differentials on the 2025 Ford Transit require SAE 75W-85 Hypoid Gear Lubricant. For the rear differential, the fluid must meet Ford's WSS-M2C942-A specification. This gear oil provides the necessary protection for the differential gears under heavy loads and extreme temperatures. Some models may be equipped with a limited-slip differential (LSD), which requires a friction modifier additive. Always consult your owner's manual or a qualified technician to determine the correct fluid and any necessary additives for your specific vehicle.

Brake Fluid

The 2025 Ford Transit is equipped with a DOT 4 LV (Low Viscosity) High Performance brake fluid. This fluid is designed for use in modern anti-lock brake (ABS) and electronic stability control (ESC) systems. It has a high boiling point to prevent brake fade and provides excellent corrosion protection for the brake system components. The brake fluid should be changed every two years, or more frequently if the vehicle is operated in a humid climate.

Power Steering Fluid

The 2025 Ford Transit is equipped with Electric Power-Assisted Steering (EPAS) and therefore does not have a traditional hydraulic power steering system that requires fluid.

Washer Fluid

For the windshield washer system, use a quality washer fluid that is rated for temperatures down to at least -30°F to prevent freezing in cold climates.

Diesel Exhaust Fluid (DEF)

If your 2025 Ford Transit is equipped with a diesel engine, it will require Diesel Exhaust Fluid (DEF) to meet emissions standards. The DEF must be certified by the American Petroleum Institute (API) and meet the ISO 22241 standard. The DEF tank size will vary, so be sure to check your owner's manual for the capacity and refilling instructions.

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