Without replacing any case bushings or taking the apply pistons apart.
Enough to replace the output shaft and all the frictions (and many but not all seals).
Few good pair of snap ring pliers
Took a piece of flat stock, drilled and tapped it to make an accumulator/ piston compressor. That is it for speciality tools.
Case bushings would require a special tool, if they need replacing
Piston seals can be a pain but there are tricks that include camera film or something along that lineto keep the seals from rolling as they are installed. Or special tools.
The couple I was in were nothing more then output shaft replacment and add new frictions while it is apart.
