Oil and Maintenance Guide for 2001 Honda TRX 400 FW Fourtrax / Foreman 395
Transmission and Drivetrain
Gearcase or differential lubricant listings include SEVERE GEARĀ® 75W-90.
Can I put engine oil in an ATV gearcase or differential?
Do not assume the engine, transmission, and gearcase use the same lubricant. These components can have different friction and additive requirements; use the specification for the particular compartment.

