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Truetrac diff oil synthetic or dino??

1490 Views 2 Replies 3 Participants Last post by  FishnAlaska
I have had a Truetrac installed for the past 30K miles. I am going to change out the fluid and was wondering what type of oil is everyone running?

I called True trac and they recommended to stay away from synthetic but I also read on here that our ring gear needs synthetic?

I also have read about finding oils w/o friction modifiers?

And lastly, what about weight? 80w-90 seems to be recommended but it does say right on the diff cover to use 75w-140?

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