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Jeep Wrangler YJ
YJ General Discussion
AX15 transmission fluid recommendations?
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<blockquote data-quote="DOWNS" data-source="post: 438617" data-attributes="member: 21038"><p>They'll also put ATF+4 into an AW4 because they wanted to simplify their supply train once the AW4s went out of warranty. </p><p>But in this case engine oil in the 10w40...ish range has roughly the same viscosity as 80w90 gear oil. You won't have some of the additives that makes gear oil gear oil but these transmissions return good service with engine oil in them vs gear oil. </p><p></p><p>Diffs need the EP additives because of the "sliding" action between the hypoid gears. There seems to be less need for a constant mesh transmission to have the same properties in it's oil.</p></blockquote><p></p>
[QUOTE="DOWNS, post: 438617, member: 21038"] They'll also put ATF+4 into an AW4 because they wanted to simplify their supply train once the AW4s went out of warranty. But in this case engine oil in the 10w40...ish range has roughly the same viscosity as 80w90 gear oil. You won't have some of the additives that makes gear oil gear oil but these transmissions return good service with engine oil in them vs gear oil. Diffs need the EP additives because of the "sliding" action between the hypoid gears. There seems to be less need for a constant mesh transmission to have the same properties in it's oil. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
AX15 transmission fluid recommendations?
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