ALL synthetic oils tolerate water contamination....the water emulsifies into the oil instead of separating as it would in dino oil. Another reason to use synthetics in ATVs. 3 Can Ams and I've always used Crappy Tire 75/140 and 75/90 with no issues. Gear case gets 75/140 as well BTW.What does everyone use ? My owners manual says 75 140 rear 75 90 front syn gl5 . Is there any special additives in the can am stuff?
75/90 recommended for front diff due to the Viscoloc....75/140 tip to tail here
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The factory fluid is green. Maybe one of your diffs had never been done....?That is the question is there additives due to the viscoloc in front diff ? The fluid is a different color.