Anybody used MTL in their trannie?

[amascio]

OK, so I put the Redline MT90 in my MS3. Shifts great, all that stuff.
A cold front came through Houston (middle 40's) and now during the first couple of miles of driving the shifts from 1st to 2nd have a slight grinding. If I take it easy, slow shifting the notchiness is kept to a minimum. After the engine heats things up a bit, about 5 - 10 minutes all is well.

A quick perusal of Redline's web shows that MT 90 is considerably thicker than MTL. MTL is considered a 70/80 wt whereas MT90 is a 75/90. Both are rated as GL-4. So has anyone tried the MTL in their trannie?

I have heard of BMW owners who use Redline D4 ATF in the winter (mostly guys up North) and switch to MTL in the summer. I am considering using MTL in the winter and MY 90 in the summer.

An I crazy?

Do I need a shrink? Opinions apperciated. Thanks AMascio

 

[psyshack]

I put M1's LS 75w-90 gear oil in my 5MT. Works Great!

 

[nig3]

i was told by a redline rep and many other that the MT-90 is better to use than the regular MTL so i would use that instead. Im using the MT-90 and it works great!

 

[Haltech]

You use MTL in manual transmissions that otherwise use ATF such as the Borg Warners used in Mustangs and Camaros. For this car, you need to use the MT90.

 

[amascio]

I'm thinking that the Mazdaspeeds get Ford brand 75w/90 GL4 put in them as the factory fill. This MT90 is doing so poorly I'll probably go back to that while I regroup and figure out what to do. Any other suggestions are greatly appreciated - amsoil's manual trannie fluid sounds good - anyone try it?

 

[Haltech]

I would give Royal Purple a whirl. Does really well in cold climates because of the formula.

 

[the ill switch]

Since someone mentioned a 5spd (implying non-speed3) Owner's manual specs GL4 75W-90 for all temp conditions for the MS3.

For plain 3's, it specifies GL4 or GL5 75W-90 for all temps, or GL4/GL5 80W-90 for above 10 deg. C.

 

[MightyMouse]

I tried the MT90, did not like it at all. Switched over to Motul Gear 300....much much better!