One thing to consider, redline mt90 is a thicker oil which is great for hard driving and heat;however, you have to basically warm your tranny up before it starts to shift decent. Redline mt 85 is a better choice if you don't want the hassle of warming up your tranny as much

 

I have twenty plus events on my transmission driving it super hard and it still shifts like butter, and I'm at 89k miles. I change my drivetrain fluid every three track days