Clutch and transmission fluid

Rusty

You've been grave diggin' alot lately. Bored?

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浪人 - 殺し屋
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Jsolo

75W90 trans fluid is too thick for Colorado. Probably fine if you live in FL or TX. Gears will be difficult to shift in the cold.

I ran redline MT85 for about a year and half (85xx miles). It was great initially but the following winter shifts were difficult until the trans warmed up. Difficult as in I could barely get it into 2nd. Did a trans fluid change back to nissan OE in the middle of january to fix. Perhaps because of the nature of the fluid (performance), the redline stuff just doesn't hold up as well. We'll see how the car does this winter.

With respect to clutch fluid, it's going to get replaced whether you want to or not during the master/slave replacement. Otherwise how else you going to bleed the line. Any decent DOT4 fluid is fine unless you're tracking the car.

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G37S Sedan 6MT, Eibach swaybars, Invidia Exhaust, Weaker Clutch Pedal Spring

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pbs370z

Thanks for your thoughts Jsolo.

Is your Redline MT85 fixed viscosity? I wonder because there ain't much difference between the Nissan (75W-85) Fluid (MTF) HQ Multi 75W-85 or API GL-4, Viscosity SAE 75W-85

and the Motul 75W-90. At least I wouldn't think so... I don't drive it much in the winter so maybe its not an issue for me.

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'10 Z, Sport Pkg 6 MT, Stillen Brake Cooler, Z1 Oil Cooler w/Setrab 25 row/Mocal T-stat, Southbend Clutch w/light wt Flywheel.

bvar90

So as far as transmission fluid goes what's the best option? I bought the motul fluid 300 for the transmission. Will this be a problem? I live in NY.

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Jsolo

This is what I put in - Red Line Synthetic Oil - Gear Oil for Manual Transmissions - MT-85 75W85 GL-4 Gear Oil

I'm really not sure what the issue was or what caused it to perform so poorly in the cold after so few miles. I suppose I could of put in the same fill again and it'd be fine in the winter for a certain amount of time/miles. I just chose to go back to OE. It's not great, but it works year round

They make a lot of claims, but none of them address longevity of the fluid. I suppose when used for track or HPDE purposes one changes fluid often so it's a non issue.

75W90 trans fluid is not recommended for cold environments. It will shift poorly until the fluid warms up. 75W85 is what you want to run. I'm not looking forward to winter, but do expect the nissan oe stuff to work ok in the cold.

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G37S Sedan 6MT, Eibach swaybars, Invidia Exhaust, Weaker Clutch Pedal Spring

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