u need very clean environment, take pics as u take anything apart, the valve body can be very tricky or send out someone else do it.
if u can find a way of taking out tranny cheaply or diy u could always try it.
in the end u may want a tranny shop to test all the ports for u , run air into it and see if they lock up or engage.
save u griefs as it has to come out again.

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