shui3000

Looking to replace the manual transmission fluid. What's the best one (don't say oem)? Thanks!

racerboi07

amsoil!! is what I used for my manual transmission and differential

shui3000

Sorry, please list specifics and any improvements in shifting!

quick123

iTrader: (2)

Amsoil FTW!!!!

Go for Severe Gear Synthetic 75W-90...API GL-5/MT-1 fluid, you can't go wrong with this stuff...

prankster

iTrader: (3)

I haven't read the manual. Did you have to change the trans. fluid? At what mileage? I read somewhere that it was a sealed reservoir. Maybe on AT only?

Kurtz

iTrader: (1)

The automatic on the 2IS is a sealed transmission that you never (and can't) change.

The manual is another story.

simple

iTrader: (2)

I think this is for the Diff only, what u want is Amsoil MTF (Manual tranny fluid)...

http://www.amsoil.com/storefront/mtf.aspx

shui3000

I don't see any amsoil products that are for MT, 75w-90, and api gl-5, as specified by the manual. or does that not matter?

quick123

iTrader: (2)

Huh...didn't see the syncro mesh in my wholesale price list, sorry

This has to be the best stuff, the Mazda guys always use the GM syncro mesh fluid in their manual trans to cure noise/grinding...so I would have to assume the Amsoil is slightly better...

But we all know what happens when you ASSUME...lol

shui3000

The viscosity is 5w-30. The manual states that mtf should be 75w-90

shui3000

I found something that meets the specs in the manual:

http://www.redlineoil.com/product.aspx?pid=47&pcid=7

Any experiences?

showtymers

to be honest OE, there is minimal heat transfers in manual trans , its not heat that kills MT its bad shifting, bad pressure on clutch pedal , and a failing clutch throw out bearing and pressure plate, if you want better shifting , some say syncro mesh is good, but its usually people trying to put a bandaid on failing syncos , i would worry more about clutch fluid pressure then transmission oil, rear diff the most i ever use is m1 75w 90, i really think its over doing it with redline, if you are not putting your car in that type of stress, stick with OE in the trans and what ever you can afford to put in the rear diff

prankster

iTrader: (3)

^True story.

I'm running OE Trans. fluid. I found nothing wrong with it. Haven't changed my diff though.