91 tranny swap

[urbancrawler22]

im replacing the badly slipping aw4 in my 1991 xj with an rebuilt 1990 AW4, and im replacing the 231 with the np242 out of the same donor cherokee so everything matches up......is this swap pretty straight forward? anything else i should do, im replacing the mount as well because the entire drivetrain was shaking like crazy at idle. how do i flush the converter?

thanks in advance,
kevin