Family friends of my wife... bought a used 2011 and 2012 Tacoma's with the 4.0 V 6.
Both trucks were at 100K,. and never had any real maintenance done on them except oil changes.
So I did the full bumper to bumper fluid changes, tune up etc.
Got to the trans....pulled the cooler line, like I learned from some old time hotrodders...
let the engine warm up to operating temp.. turned it off, pulled the cooler line..with it in park..
pumped out 4 qts before it started to spit, and immediately turned it off..
Walmart's Dextron 6 transfluid is also spec'ed for Toyota T1-IV, plus the WS specs...
gallon jug poured a qt at a time.... very slowly thru a small funnel, attached to the line...
$21.00 where the dealer wanted $350.00 for the same thing.
Valvoline max life also meets the same specs...
both trucks are in the 180K range now.. so I am sure the owners will be calling me again for the
same treatment when they hit 200K, tune up, fluid changes etc...
neither truck had a dipstick tube from the factory.... fluid is cheaper than a trans...
use the same fluid in my Pilot as it meets Honda DW1 standards...every 25K....