What is a Hypoid Gear?

[chitowndad]

Since the process is pretty simple, I'm going to try 3 quarts of Royal Purple at $13 per quart and if I don't like it I'll switch over to Porsche fluid at $28 per quart which is rediculous but it is what it is...

I once put RedLine MT90 and eventually MTL90 into my Nissan 300ZX and ended up putting in Royal Purple which I liked better... My Nissan had 100K miles without transmission service (lame previous owner) and MTL worked better than MT90 but Royal Purple was even better (quiter and less knotchy)

Thanks for all the advice. A local Porsche shop is like 1 hr. away...

-Steve