Remove the flange bolts.
Remove the sealing cap using a 1/2" extension
Expand the snap ring on the counter shaft bearing while prying the housing open
The housing might be stuck to the dowel pins do not scratch the mating surfacing separate gently.
Remove trans (see DIY in engines and transmissions)
Remove (2) detent bolts, (2)springs, (2)balls and backup light switch
Remove the selector lever assembly. Put it in the center position which is neutral