
Change it out. Fresh fluid exchange with Eneos Eco-ATF on a 2001 Toyota Tundra V8. Had to replace weeping P/S return lines under the truck so why not jack up the truck, put the return line into a jug and turn the wheel left to right a couple times. Prior fill of Valvoline DexVI still looked good with its typical used burnt smell.
This was at night pointing a bright LED flashlight onto the reservoir. Sorry for the ham in a can pumps and non-transparent PSF reservoir guys though.