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Best fluid for True-trac ?

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Old 01-29-2007, 10:04 AM
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Default Best fluid for True-trac ?

I just got my 9 inch, just wondering what fluid and how many guarts i need for the true-trac and also do i need to run GM additive with it ?
Old 01-29-2007, 12:09 PM
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Most I've seen are running non-synthetic 80/90 weight. I've seen posts of 3 and 4 quarts . I'm running 4 quarts of valvoline 80/90 in my 9 inch/trutrac. Although not required, I'm going to swap out the lube after 100 miles or so. I am just going with the crowd on the dino lube until I have some time to research why synthetic is bad for myself.
Old 01-29-2007, 02:47 PM
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I was told by a tech at Eaton/Detroit that you want to run 80w90 in a TrueTrac. No need for the additive since it's a gear setup without friction plates.

He also recommended going with dino oil; he said that most of the people calling him to complain about a noisy TrueTrac are running a synthetic like Royal Purple or Redline.



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