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SportTrac Discussion
Fluids: Oil, ATF, Coolant, etc.
Differential Oil
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<blockquote data-quote="user 71196" data-source="post: 1017374" data-attributes="member: 71196"><p>Much confusion I have over this. I am getting my rear diff (4.10 LS) oil replaced this coming week when my truck goes in for its other scheduled repairs. I will be replacing the oil with Valvoline 75w-140 Synthetic. It claims it already has the additive for the LS. Some people say its fine, others insist you still have to add the friction modifier. I searched here, and there is still quite a debate from the older threads. Just wondering what y'all think bout that now. </p><p></p><p></p><p></p><p>Also, for the front, the fluid is also claims its for LS diffs, as I'm getting a 75w-90 synthetic as well. Will that matter as the front does not seem to need any friction modifier at all? Or should i just stick with 80w-90 conventional oil? </p><p></p><p></p><p></p><p>Once again, my thanks to y'all in advance. :haveabeer:</p></blockquote><p></p>
[QUOTE="user 71196, post: 1017374, member: 71196"] Much confusion I have over this. I am getting my rear diff (4.10 LS) oil replaced this coming week when my truck goes in for its other scheduled repairs. I will be replacing the oil with Valvoline 75w-140 Synthetic. It claims it already has the additive for the LS. Some people say its fine, others insist you still have to add the friction modifier. I searched here, and there is still quite a debate from the older threads. Just wondering what y'all think bout that now. Also, for the front, the fluid is also claims its for LS diffs, as I'm getting a 75w-90 synthetic as well. Will that matter as the front does not seem to need any friction modifier at all? Or should i just stick with 80w-90 conventional oil? Once again, my thanks to y'all in advance. :haveabeer: [/QUOTE]
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SportTrac Discussion
Fluids: Oil, ATF, Coolant, etc.
Differential Oil
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