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Front DIFF 75/90 OK??

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Old Aug 17, 2020 | 01:52 PM
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Flitastic
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Front DIFF 75/90 OK??

I know the book calls for 80/90 but I have some premium synthetic 75/90 at home already I would like to use in the front diff.. just wanting to know if it would be OK to use. Also , no LS additive goes in the front only the back correct? Thanks!
 
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Old Aug 17, 2020 | 01:58 PM
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BillyE
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Originally Posted by Flitastic
I know the book calls for 80/90 but I have some premium synthetic 75/90 at home already I would like to use in the front diff.. just wanting to know if it would be OK to use. Also , no LS additive goes in the front only the back correct? Thanks!
That’s fine. You only need friction modifier if you have a friction clutch style limited slip differential. Those only come on the DRW rear or the Tremor front axles.
 
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Old Aug 17, 2020 | 03:11 PM
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Originally Posted by BillyE
That’s fine. You only need friction modifier if you have a friction clutch style limited slip differential. Those only come on the DRW rear or the Tremor front axles.
Yep, mines a DUally so figured for the rear, just not front. THanks!
 
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