Quote:
Originally Posted by Silver Dollar
I don't know which type of lube is in the boxes on my truck. If it is dino lube, will it harm anything to switch to synthetic? All three have high mileage.
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Going sythetic would be a good choice. Will cause no problem switching from dino version if that is what is in there. Most Eaton and Merritor trannies and rears have been factory filled with synthetic lube for the last 10 years. If we were talking about using synthetic in an engine, very high mileage might be an issue (though not usually), but trannies and rears do not have the same issues as engines, so switching would not be a problem.
Synthetic is better protection and can increase your mpg.