I will tell you this, I have used both Amsoil ATF and Redline D4, it is strange that Redline D4 has a lower pour point because with the Amsoil ATF the car shifts much better even when it is cold, put it too you this way when I start out on a cold day the car shifts as if it is warmed up whereas with the Redline D4 it was sluggish until it warmed up, do not know why. I know a mechanic who works on transmissions and he only uses Amsoil ATF in his personal vehicles, I said why, he told me in 25 years of using Amsoil ATF in his transmissions he has never had any problems. I would also recommend you try Auto-Rx in your transmission before putting in the new fluid, you can post me and I will give you my reasons, good luck.