MT Fluid Reccomendations KA Tranny

[Brandon240sx]

I’ve been searching around and have found a whole bunch of info. None leading me in one direction. I know I need gl-4 fluid.. What brand and type of tranny fluid should I be looking at? I’ve heard redline mt90 is good up until about a year.. I’ve heard royal purple and penzoil sucks, Lucas and Mobil 1 both grind gears like crazy. This is all what I’ve heard.

The fluid is for my stock KA24E

What do you use and what do you recommend?

[Bnr32gtr]

Motul 80-90 best stuff I've found that's yellow metal safe

[KAT-PWR]

I just put Redline in and it made a significant difference.

[Brandon240sx]

I just put Redline in and it made a significant difference.



I’ve seen that it messes up tranny’s

[feito]

FWIW, I run redline shockproof lightweight on my rb, and I just changed it today haha. Runs flawlessly.

[Agamemnon]

AMSOIL severe gear.

[kyral]

I run lucas marine gear oil 2qts with a half bottle of oil stabilizer. shifts better the warmer it gets
People swear by redline though

(I have stopped using lucas oil stabilizer, been using Quiksilver sae90)

[derass]

Redline MT-90 and Amsoil GL-4 are both the correct spec. I've used both, they both seem to work good with no discernible difference in shift quality between the two.

[smoked240]

I’ve seen that it messes up tranny’s

Umm What? Haha.

I've been switching over to redline, I run it in my snowmobile and haven't looked back.

[Standard]

+1 for Amsoil GL-4

[Brandon240sx]

Umm What? Haha.



I've been switching over to redline, I run it in my snowmobile and haven't looked back.



Redline or ams it is

[Ilya]

Amsoil is worth the shipping wait. Redline and royal perp suck in comparison

[dukiespice]

Redline mt90

[jedi03]

i used royal purple in my sr and ka trans...was amazing, I run motul in my sti

[garagelu]

Redline MT-90 sucks when its cold and even when warmed up, shifts feel notchy. I love Amsoil...shifts are buttery smooth.

I put Motul in my S15 but haven't run it yet so can't say anything good or bad about it yet.

[jedi03]

my sti has been notchy with it the last few cold days only for sifrt few shifts then its good...

[pacotaco345]

I put used 20w50 in my trans the other day...

[brndck]

ive been using mt90 for years with good results. down to try motul next time tho.

[kyral]

I put used 20w50 in my trans the other day...

Lol. not gonna say I haven't done this to top my trans off but that is such a bad idea
I bet it shifts really nice cold

[Lex Zarza]

One guy told me on Garage Amino app. 75w-90 GL4 yellow fluid is better. GL5 is not good to the gears. damages the brass an metals.

[Colorado S14]

What a bunch of biased jerks, it's 2020 fellas. It's not Tranny Fluid, it is Gender Neutral Shift Juice.

[slider2828]

One guy told me on Garage Amino app. 75w-90 GL4 yellow fluid is better. GL5 is not good to the gears. damages the brass an metals.

GL4 and GL5 is different formulation. Its not one is better than the other.... GL4 only for Nissans

[LoSt180]

This was settled a long time ago.

Redline MT-90 or OEM Nissan MTF for the trans. The trans requires GL4 fluid. If you feel that MT-90 is too "notchy" then you can use MT-85 which was designed for the newer CD0/JK trans in the Z/G cars.

The diff takes GL5, which is easily found at local auto parts stores.

[e30gangsta]

Amsoil > mt90/85.

[PoorMans180SX]

Well then, what a weird thread.

FYI the three top companies that make GL-4 compatible gear lube:

Redline: MT85, MT90, Super lightweight shockproof, lightweight shockproof
Motul: While their 75w90 and 75w140 lubes say GL-5, they are GL-4 compatible
Amsoil: Severe gear is GL-4 compatible

In my KA24DE transmission (which I'm pretty sure was not in great shape) MT-90 was a bit notchy. I ran straight lightweight shockproof and it was an improvement except when it was very cold.

[e30gangsta]

Well then, what a weird thread.

FYI the three top companies that make GL-4 compatible gear lube:

Redline: MT85, MT90, Super lightweight shockproof, lightweight shockproof
Motul: While their 75w90 and 75w140 lubes say GL-5, they are GL-4 compatible
Amsoil: Severe gear is GL-4 compatible

In my KA24DE transmission (which I'm pretty sure was not in great shape) MT-90 was a bit notchy. I ran straight lightweight shockproof and it was an improvement except when it was very cold.

Run the amsoil and that will go away. Best transmission fluid ive ever used on these cars.

[mechanicalmoron]

Cold transmissions don't feel like hot transmissions. If your cold transmission doesn't feel "notchy", scrap that piece of shit and get you some PRNDL in your life.

Who's actually found a split GL4/5 to attack their synchros? You know all transmissions since forever are jam packed full of yellow metals? There are bad GL5 oils that attack yellow metals, but that doesn't mean that nothing that meets GL5 isn't fine, or better.

As to Amsoil making cold shifting amazing, you guys are out of it. Royal purple shifts nice cold, it's a buttery shifting boy-racer oil. It won't melt your synchros, and whatever gold stuff sits on top of your oil isn't corroded brass, it's uncorroded brass, because your tranny is totally clapped out. Amsoil drives quite differently as it warms up, and it won't be really nice when it's cold. Stop yanking on your shifter and give it a second, and stop making shit up. The split weight on gear oils is hardly split, it's quite impossible for it to be even close to the same.