If you had trouble shifting into second, this won't solve anything, it's most likely a tranny problem.
It's not a miracle fluid.
Not noticeable for normal driving
Just downshift at high RPMs, 5K in third, sending second into lift..goes into second! (just not smooth)..feels like to me that tranmission fluid currenlty in their is too slick for synchros..harder for them to match revs at higher RPMs with crappy lubrication
My thoughts, i hope MT90 will help