108 Maintenance Transmission and Rear Axle Maintenance Transmission General Transmissions should not be operated consistently at temperatures above 250 F (120 C). If the temperature reaches 285 C), stop the vehicle to let the temperature go down (see the vehicle Operator’s Manual for information on the optional transmission temperature gauge). F (140 F (120 Operating temperatures above 250 C) increase the lubricant’s rate of oxidation and shorten its effective life. If the transmission oil temperatures are consistently high, change oil more often or install an oil cooler.
With lengthy or continuous driving at altitudes of more than 6,000 ft (2,000 m) above sea level, more frequent oil changes will be necessary. W4001387 Note: Always dispose of oil according to Federal or local regulations. Used oil disposed of in nature or waterways contaminates our drinking water and kills wildlife. Take all used oil to a recycling or waste collection center.