How often do you change your diff fluid?
Senior User
Joined: Dec 2006
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From: Rhode Island
Originally Posted by Flying Finn
BTW, why is the front not synthetic? I thought i.e. 75w-90 Mobil would be good, no?
Postmaster
Joined: Dec 2003
Posts: 4,196
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From: Arizona
Originally Posted by Flying Finn
BTW, why is the front not synthetic? I thought i.e. 75w-90 Mobil would be good, no?
Senior User
Joined: Nov 2007
Posts: 142
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From: Miami Beach, FL
Originally Posted by blackhat620
You can use synthetic in place of dino lube with no problems. FMC uses dino to save a little money. The rear axle was changed to synthetic from the factory mainly to prevent premature failures they were experiencing a number of years back.
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Joined: Dec 2007
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use 90-140 synthetic gear lubean just bout forget about it. get heavy industril magnet ond get it inside the case or get a magnetic drain plug if there is a plug on axle. road ranger big truck transmission actully cst in magnets inside the trnsmission housings. that will take care of tiny metal stuff.
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