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Differential Oil Question

12K views 9 replies 9 participants last post by  mudslinger828 
#1 ·
Have an 05 Grizzly 660. What kind of gear oil do you guys run in the front and rear diff?
 
#4 ·
royal purple max gear oil 75w-90. good stuff.
 
#9 ·
You CAN switch to synthetic if you ran dino previously. Synthetic does not break down as fast from heat like dino oil does. It has a wider range of heat tolerance and dissipates heat better. The additives in the oil still do break down and the oil gets contaminated over time so you still need to change it regularly. Synthetic is also better for temps below freezing.
 
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