used redline MT90 in diff and transmission
08-05-03, 09:36 PM
#1
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used redline MT90 in diff and transmission
most people putting MTL in their transmission? why is that? i would think MT90 would be better? also i filled the trans about 2.5 and the rear diff 1.5 quarts. that sound right? that was listed in the manual. i had the car up on jack stands so i couldnt tell if it was full and i didnt want to add more incase it overfilled.
08-05-03, 10:14 PM
#2
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agree mtl 70W80 is too thin for hard driven/mod'd FD.
But MT90, blended for good shifting, might not be best choise for LSD rear. redline suggests 75W90 gear oil, and I use an extra shot of friction modifier.
But MT90, blended for good shifting, might not be best choise for LSD rear. redline suggests 75W90 gear oil, and I use an extra shot of friction modifier.
08-06-03, 04:24 AM
#4
NorCal 7's Co-founder
Originally posted by maxcooper
MT oils are not for the diff. You don't need friction modifier, either -- the Torsen doesn't need it.
-Max
MT oils are not for the diff. You don't need friction modifier, either -- the Torsen doesn't need it.
-Max
08-06-03, 09:49 AM
#5
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Originally posted by maxcooper
... You don't need friction modifier, either -- the Torsen doesn't need it.
-Max
... You don't need friction modifier, either -- the Torsen doesn't need it.
-Max
08-06-03, 10:14 AM
#6
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Originally posted by KevinK2
It doesn't 'need' it, but amount of torsen lock can be tweaked based on fluid friction. torsens are all about friction. My preference for my mixed use is less lock, achieved with the extra shot of modifier (slick stuff).
It doesn't 'need' it, but amount of torsen lock can be tweaked based on fluid friction. torsens are all about friction. My preference for my mixed use is less lock, achieved with the extra shot of modifier (slick stuff).
The friction modifier is for clutch plates, of which the torsen has none. Syn gear oil is as slick as you can get unless you go to teflon or something. Regardless, the torsen is designed to work with the exact coefficient of friction of gear oil. Anything else can just hurt.
08-06-03, 10:19 AM
#7
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tmiked and maxcooper are correct.
The Redline that I have used on a 230k miles FD with original diff and tranny is the MT90 in the tranny and 75/90NS in the diff.
Right now I have the Shockproof Redline diff fluid, but I will be going back to the 75/90NS to go back to the original HP and MPG when I was running it.
THe Shockproof is so thick. I think it's in the mid100~ weight. It's idle for people that race, and beat their diffs alot.
The Redline that I have used on a 230k miles FD with original diff and tranny is the MT90 in the tranny and 75/90NS in the diff.
Right now I have the Shockproof Redline diff fluid, but I will be going back to the 75/90NS to go back to the original HP and MPG when I was running it.
THe Shockproof is so thick. I think it's in the mid100~ weight. It's idle for people that race, and beat their diffs alot.
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08-06-03, 12:12 PM
#8
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Originally posted by tmiked
WRONG
The friction modifier is for clutch plates, of which the torsen has none. Syn gear oil is as slick as you can get unless you go to teflon or something. Regardless, the torsen is designed to work with the exact coefficient of friction of gear oil. Anything else can just hurt.
WRONG
The friction modifier is for clutch plates, of which the torsen has none. Syn gear oil is as slick as you can get unless you go to teflon or something. Regardless, the torsen is designed to work with the exact coefficient of friction of gear oil. Anything else can just hurt.
No clutch plates, but lots of critical friction surfaces of similar function, that are not the gear meshes. Enough friction to turn the redline gear oil black after 4-6 track events at a road course.
If you want a lot of lock, run redline NS gear oil, MT90, or dino gear oil. For less lock, shockproof or synth with xtra modifier. Mazda specs both GL4 and GL5 for the diff.
08-06-03, 01:03 PM
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Originally posted by potatochobit
so the problem im going to have with the mt90 in the rear diff is going to be too much wheel spin?
so the problem im going to have with the mt90 in the rear diff is going to be too much wheel spin?
08-06-03, 02:34 PM
#12
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Originally posted by potatochobit
so the problem im going to have with the mt90 in the rear diff is going to be too much wheel spin?
so the problem im going to have with the mt90 in the rear diff is going to be too much wheel spin?
http://www.redlineoil.com/redlineoil/gearolti.htm#75W90
redline would recommend their 75W90 gear oil. call them.
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