Lubrication

A multi-purpose, hypoid gear lubricant which conforms to the following specifications should be used. Mopar Hypoid Gear Lubricant conforms to all of these specifications.
^ The lubricant should have MIL-L-2105C and API GL 5 quality specifications.
^ Lubricant is a thermally stable SAE 80W-90 gear lubricant.
^ Lubricant for axles intended for heavy-duty or trailer tow use is SAE 75W-140 SYNTHETIC gear lubricant.
^ The 181 FBI axle lubricant capacity is 1.48 liters (3.13 pints).

CAUTION: If axle is submerged in water, lubricant must be replaced immediately to avoid possible premature axle failure.