Reddit Reddit reviews Red Line (50304) MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant - 1 Quart

We found 10 Reddit comments about Red Line (50304) MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant - 1 Quart. Here are the top ones, ranked by their Reddit score.

Automotive
Oils & Fluids
Oils
Gear Oils
Red Line (50304) MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant - 1 Quart
Less slippery low sulfur formula compatible with brass synchronizersStable at high temperatures in performance applicationsAlso available as lighter viscosity like MTL and MT-85Satisfies gear oil viscosity requirements of 75W; 80W; SAE 40 10W40 and 15W40 motor oilPopular in VW Audi; Nissan; Toyota and Mazda
Check price on Amazon

10 Reddit comments about Red Line (50304) MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant - 1 Quart:

u/nonickname87 · 6 pointsr/CherokeeXJ

That is extremely poor advice. All lubricants breakdown over time, and should be changed out with fresh fluids. This probably come from people putting the wrong fluid in. You need to replace it with GL-4 gear oil. Most gear oils you'll find at local auto shops is GL-5 and not safe for the syncros. If you need to change it, get some MT-90 from Amazon. You'll need to buy 4qts. Also, a pump will help out a lot.

u/broken_cogwheel · 5 pointsr/MechanicAdvice

You can buy it on amazon.

Redline gl4, the "I give a fuck about this transmission enough to spend $60 on it."

or stalube cheapo for the "whatever, it's GOOD ENOUGH"

I've used both and the transmissions keep on truckin'

u/imabaaadman · 2 pointsr/Jeep
u/fictionthatspulp · 2 pointsr/ft86

Slow and smooth when letting the clutch out. Also, Allow the RPMs to drop to avoid the jerking/jolting. Pretty much treat it Zohan. Make it silky smooth

Being a 2017, i'd assume you're still in the break in period (or around there), which doesn't help matters.

I'd recommend the removal of the clutch spring as well to provide more driver feedback, making things that much easier.

If none of that helps.... maybe try a different oil like Motul 300 or Red Line MT-90

u/Rainer3012 · 1 pointr/Miata

I have the 6 speed and the torsion LSD.

I'm looking at doing my transmission lube and rear differential. I'm looking at
Red Line (50304) MT-90 75W-90 GL-4
for the transmission and
Red Line 57904 (75W90) GL-5
for the differential.

Would this work ok or should I just go with the GL-5 all around? Also am I correct that the transmission takes 2 quarts and the differential takes 1?

u/yippee_kaya · 1 pointr/WranglerTJ

Speaking to the AX15, mine refuses to engage properly, especially in the Colorado winters, without be filled with MT-90. I thought I was going to have to do full rebuild, but just that MT-90 made it good enough. 190,000 miles and only other maintenance has been clutch, flywheel, throwout bearing and slave cylinder (all done together).

u/myachizero · 1 pointr/ft86

So then the fluids are the same?

I'm having trouble understanding the difference between this and this.

Is this just marketing from the company?


Yeah, I plan on buying these fluids myself in the future and having the mechanic do it, I just wanted to be sure I didn't put something where it didn't belong.

Thanks for the help, man. Solid advice as usual :)

u/CylindricalBox · 1 pointr/Datsun

Thanks all for replying!

As far as I can tell, the shifter does not drain to the transmission itself, at least not in my car.

I ended up removing the reverse light switch with an adjustable wrench. I'd guess it's about 20 mm. The switch is about level with the fill plug, only closer to the front of the car.

Once you have the switch loose, empty out the old oil from the drain plug. Loosen it with a 1/2 in square recess. Clean off any metal shavings caught in the plug's magnet and tighten it back on after the oil is out. Don't be a gorilla about torquing anything down. Before fully removing the reverse switch, make note of the two wires and disconnect them.

I used a hand pump to add the gear oil, but you could probably feed a long hose above to the engine and fill using a funnel. I added 2 quarts of Red Line MT-90 (75W-90), which is a touch under how much the manual calls for (2 liters). Clean the area after you're done, and dispose of the junk oil responsibly.

So, the car is back on the road again, at least until I try to fix (break) anything else. There's a bit less transmission noise now, and shifting is slightly smoother. The biggest difference is the transmission tunnel temperature. Before, the shift lever and ash tray area would get almost too hot to touch. Everything runs much cooler now, so I'm happy!

Hope this helps anyone that may search through here in the future!

u/lastdazeofgravity · 1 pointr/scion

Yea most just stock gl-5 fluid so they use that. Gl-5 was created for differential use so it is much slippier. Slippier is not good for your synchros since they need to be able to grab.

My old 2006 m/t corolla had same issue. Manual even said you could use gl-4 or gl-5. Swapped to gl-4 and buttery smooth shifting.

Heres a DIY


And some manual trans fluid

u/bmcnult19 · 1 pointr/350z

Your flywheel is going to be fucked from driving so long with a slipping clutch. Shame on you OP for driving that long like that. You should replace that shit when it starts slipping to avoid damage. Your bell-housing is probably dinged up on the inside too. You're gonna want to drain the trans oil and inspect it for metal flake and then when you replace it (assuming there's no metal) you should probably go with Red Line MT-90.