I've noticed some more shift shock when using Maxlife sometimes - other times it's smooth. Perhaps it's throttle dependent. The fluid level and condition is spot on. I'll be adding an auxiliary B&M transmission cooler and a Magnefine filter in the next few weeks, too. Is Maxlife possibly too thin for my Pathfinder which specifies Matic-D? Should I try adding some Lubegard Red or try using a different or OEM ATF? Other than the shift shock, I have no issues with the transmission at this time.