ok heres the deal, i did alot of research regarding the tranny and diff oil and for some reason i came to the conclusion to use 50/50 mt-l/mt-90 for my tranny, so thats fine, but the prob is..after reading some more after my change, i relized that everyone else is using redlin 75w/90 gear oil! and i used mt-90!!! although the oil viscosity rating is the same, did i screw up big time??? i changed only 3 weeks ago, if i did screw up, it can still be saved!!!! because the 75w/90 gear lubes are GL-5 and we use GL-4 thats why i used MT-90. help!

 

your fine with the fluid. Don't bother messing with that RedLine crap, if you want the best check out www.royalpurple.com

Doc!

 

I owned a 90 300zx before this with 150k miles and the syncros were going bad real fast a lot of grinding. Redline was the only thing that fixed it. Go to twinturbo.net and search for redline its good stuff.