@
hawkcharmer
, mine doing same thing @ 30* and below. New rack 5k mi. system flush pump screen clean
Belt grooves cleaned scuffed with sandpaper new belt tension gauge adjusted regular ATF Pump @ 229k mi.
It the pump, check out FSM section SR-35 clearance's in the 10,000th inch range for Vanes and Shaft
cold thicker fluid slipping by. Doing it at 50* your closer to pump end of life than me I'm a 3rd coaster
I've got miles to go yet.
If belt is not loose.