Here is one
way to flush out your tranny - however if your fluid is very burnt
there are most likely internal parts damaged and you would be better
off with a tranny rebuild and a new torque converter. This uses
the transmissions own pump to pick up fresh fluid from pan and flush
out the old stuff.
- determine which cooler line is the return line
to the transmission and disconnect it.
- replace tranny filter pan and gasket. Refill pan
with new fluid.
- place one gallon container under disconnected return
line. Run engine until container fills with fluid and turn off
- refill transmission pan with four quarts of new
to run tranny through all gears to flush all old fluid from valve
until fluid runs clear out of return line.