"O" - Off-Road Operation
SPECIAL OPERATING CONDITION "O" - Off-road operation
EVERY 30,000 MILES Change automatic transmission/transaxle fluid (not required on 6R60 transmission).
EVERY 50,000 MILES Change rear axle lubricant (E450 and F450/550 only).
EVERY 60,000 MILES Change transfer case fluid.
AS REQUIRED Replace cabin air filter (if equipped).
AS REQUIRED Inspect and lubricate U-joints.
AS REQUIRED Inspect and lubricate steering linkage ball joints with zerk fittings.