Rear Differential Lube?

[Jeff]

Going to replace the rear diff. gear lube for 95 SC400 this coming weekend. Could I get the opinions of the best weight and and name brand to use as well as if I need any additives to help keep the limited slip working (like old whale jiz). What is the best additive by name? Synthetic lube ? Thanks

[brucelee]

I just put in Mobil 1 75W-90 full synthetic. Good stuff. You will need two qts. No need to use additives with this stuff.

Good luck

Going to replace the rear diff. gear lube for 95 SC400 this coming weekend. Could I get the opinions of the best weight and and name brand to use as well as if I need any additives to help keep the limited slip working (like old whale jiz). What is the best additive by name? Synthetic lube ? Thanks

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[johnny3]

I like synthetic in manual transmissions but in that limited slip diff. I'd use the Toy/Lexus OEM stuff, only 2 qts.,good for 60k or so, pretty good insurance.