Detroit Truetrac
- Thread starter LsxBuickRegal1982
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Pretty sure the factory recommends synthetic on Thorsens....? 
Why would it be different for aftermarket, especially since Eaton makes them for GM?
Why would it be different for aftermarket, especially since Eaton makes them for GM?Pretty sure the factory recommends synthetic on Thorsens....?
Not sure. Now you're gonna make me go rooting through my manual aren't you?
Yup! I googled "2000 Z28 differential fluid" and it pointed to a Bobistheoilguy post that referenced a GM part number, which happens to be synthetic. Now, on the other hand, the destructions that came with the Moser housing and axles said to use dino only- no idea why.
I can see where it might make more of a difference with conventional clutch material, but not so much metal on metal like an Auburn or TruTrac.
I can see where it might make more of a difference with conventional clutch material, but not so much metal on metal like an Auburn or TruTrac.
The Auburn is a picky b*tch with gear oil. It'll unload, lock up, do all sorts of weird sh*t. Even when you get it right it has a tendency to unload the right rear.
Well looks like I'm half correct. Gotta read the whole paragraph. Basically the less slippery the lube, the more aggressive the diff will act.
Had a tru trac put in my Monte's original rear end with new 28 spline axles shafts. Putting around 330 340 hp at the wheels i believe. Grabs the ground and goes good. put a little over 2000 miles on it last year with no issues. Nice seeing 2 black lines on the road
I love mine. I don't know what anyone else is talking about as far as noise. It's silent. Not sure if some of the posters are thinking of a locking diff. Tru-tracs are not one of those. They are meant more for road racing than drag racing.
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