I just went to napa auto and saw that they have Redline tranny fluid. I remember reading about how it helps smooth out our tranny so I bought some. However when I got home and read more closely I realize they are talking about the Redline MT-90 not the MTL (which I bought). Is it ok to use this fluid? Have anybody ever use straight MTL? I live in northern California if that makes a difference.

If this has been asked before I apologize. I cannot seen to find any people using straight Redline MTL when I was doing the search.

 

No.

You want a GL-4 fluid. This WILL eat the softer metal in the tranny.

 

But it is the API GL-4. Says so right on the bottle. "REDLINE MTL 75w-80 API GL-4". On the back of the bottle it also gives a warning about how using GL-5 oil is too slippery to offer protection on tranny that requires GL-4.

 

Hey, did you ever get a chance to fix the hazard and defrost lights?

 

Its just a bit thinner than MT-90 and it works fine. Yes its GL-4! We mixed it in a friends car, not really by choice but to get 5 qts locally. It actually made for some nice winter time shifting.

 

i dont think thats the synthetic stuff.....

 

I apologize, on the Redline website it has GL-5 in the MTL info.

 

i was wrong its synthetic


MTL
This 70W80 GL-4 Gear Oil (SAE 5W30/10W30 engine oil viscosity) is designed for use in manual transmissions and transaxles. Provides excellent protection of gears and synchronizers and its balanced slipperiness provides a perfect coefficient of friction, allowing easier shifting. Popular in many BMW transmissions and in most Honda and Acura transaxle applications.

MTL is the correct product for Big-Twin primary chaincase. Big-Twin transmissions should use Red Line Heavy Shockproof, while Sportster and Buell Tranmission should use Red Line 75W90 GL-5 gear oil.


Red Line MTL is classified as a 75W/80W gear lubricant
satisfying the API Service requirements of GL-3 and
GL-4. MTL also satisfies motor oil viscosities SAE
5W/10W/30, and the viscosity requirements for ATFs.
MT-90 is a 75W90 GL-4 and also satisfies motor oil
viscosities SAE 10W/15W/40. The additive chemistry
used is non-corrosive, so even though they will provide
GL-4 performance, they will not corrode synchros or
bushings. Because of its low corrosivity, Red Line MTL
and MT-90 could also be used in transmissions requiring
GL-1 or GL-3 lubricants. Seal compatibility is designed to
be similar to petroleum-based lubricants.

 

Yeah sorry, I typed it a few minutes ago and forgot to hit submit until after the bathroom break.

 

MTL is too thin. You can use it, and in winter it will be nice, but once the summer heat comes you want a 75w-90 in there.

 

gotta love the poop breaks.......but yes in the colder months it will feel great...but once it gets hot out......you might want to change it back to MT-90 or whatever u want to use