Hi Micheal Lethebe, way post 3 time
one car one problem ,tranny dead.?
just add fact to the first post by clicking comments.
the pump is dead.
only why remains and I told you that on the other post.
that solenoid last, the whole transmission must work correctly before TC lock up can happen. and only in high gears.
pump bad,
pump seals bad,
pump regulator is bad and stuck wide open.
or filter top pipe not cracked, or filter fell off and pump suck\s air now. oops pump dead,. or pan dry.
you put in a new TC did you prime it first with 1qt of AFT before installing it. the 3 qts of Aft IN THE PAN TO START
THEN add fluid until dips stick goes normal.?
but if the pump is dead the TC never fills full up (remaining) running, and can not send hot AFT oil to the cooler port.
the pump is dead,focus on that
google why my A/T BOX PUMP IS DEAD,.
AND IS COMMON.
SOME HAVE PLASTIC VANES AND FAIL.
AND FOR SURE EVER RUN DRY THEY DO,.
and with a dead pump transmission damage progresses fast. $$$$$$$$$$$
pump failure can also be a massive leak deep inside the box,.
here is nice drawing of a 3sp old hyrabox. in color.
if any of the RED paths leak too much or all adding up to too much,then the pump is overloaded
yours is more complex with lots of electric solenoids.
as you cans here the cooler pipe steals AFT from the roasting HOT TC , output side, and has and orifice there. this exit point is the most hot spot.
THIS IS ONLY A WRONG TRANSMISSION HERE
i WANT YOU TO SEE HOW THE RED PATH WORKS
AND ALL WAYS THAT CAN LEAK AND FAIL.