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How often to change rear axle oil and trans fluid?
I have a 2018 Chateau class C on the Ford E450 chassis. The Ford owner's manual states that the rear axle oil should be changed at 97,500 miles and the transmission fluid should be be changed at 150,000 miles under normal driving conditions. However, if it's used for regular towing, then the rear axle oil should be changed every 22,500 miles and the trans fluid every 30,000 miles.
It seems like hauling around a 32 ft. RV would be very similar to towing as far as stress on the drivetrain, so maybe I should follow the towing maintenance schedule. What do you other owners do?
Mine has about 22,500 miles on it now, and I did tow a car behind for about 5000 of those miles. Should I change the rear axle oil now?
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