would Redline MT-90 be the best fluids for my t-case and 5 speed trans ? (1989 4x4 pickup 195,000 miles)....if so who has the best deals ?

thanks,
Highway

 

Yes, Not a clue.

do a search if you want more peoples thoughts on mt-90

 

My 5spd shifts nicely with it. Much better than before. 1600 posts! YEhaw

 

I get it from Summit Racing

 

MT-90 is without a doubt, the best transmission fluid I have ever used in my R154.

I HIGHLY recommend it.

 

thanks........... does it work well in the transfer case too ?

highway

 

Transfer case uses GL-5 spec fluid so don't use M-90 it is GL-4

 

I use both in my tranny and tcase, and my rear diff.

I also got it from summit.

 

You might be interested in reading this thread.....

https://www.yotatech.com/forums/f116...uestion-98830/

 

Actually, both the tcase and tranny are GL4/GL5. The problem with using a GL5 in the tranny is just that it's TOO slick and the synchros don't work as well.

I use GL5 heavy shockproof in my tcases to help quiet them down.

http://www.4crawler.com/4x4/index.sh...ntheticGearOil

 

gl-4 should be fine in the t-case, but I would recommend a gl-5 for the rear axle. gl-5 has better extreme pressure additives (moly? I think)

 

Transfer is same spec as trans; MT-90 is fine. MT-90 is NG for diff, though---GL-5 only. Interestingly, Nissan specs GL-4 only for its truck transmissions.

 

I used mt90 and MTL 50/50 in both the tcase and trans, mobile 1 hypoid in the diffs. 235 on the rig and shifts perfectly smooth, big improvement over the initial notchy grinding and synchro clash into reverse