Red Line 75W90 or 75W90 NS for Differential

cbutler

New Member
Jan 31, 2006
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Regina, SK
Looking to replace the fluid in my stock JZA70 differential with around ~150000kms on it. This is the 4.10 diff. Not sure if I should go with the 75W90 with or without the friction modifiers?
thanks,
 

cbutler

New Member
Jan 31, 2006
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Regina, SK
I believe so, can someone clarify if all JZA70's came with the torsen? I will double check the ratio next time I have a chance.
 

Jeff Lange

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Mar 29, 2005
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jefflange.ca
Not all JZA70's had Torsens. Hold the pinion flange stationary and try to turn one of the side shaft flanges. If you cannot turn it without turning the pinion flange, it's a clutch diff, which requires friction modifier.

Torsens do not require friction modifier, so if it's a Torsen, just use straight 75W90NS. If you have a clutch diff, you can use 75W90, or use 75W90NS and add friction modifier (preferred IMO).

Jeff
 

Poodles

I play with fire
Jul 22, 2006
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I'd say whichever is cheaper since the the friction modifier isn't going to have an impact on the function of the torsen.