Ford Corsar Repair Manual page 602

ASSEMBLY
E l
10. Lubricate low and reverse brake piston seal, then install
piston by tapping it evenly with Tool.
11.
Install low and reverse brake retainer, and secure with snap
ring.
12. Install low and reverse brake driven & drive plates and
retaining plate, then secure with snap ring.
Use tool E7 179.
13. Install output gear.
14. Temporarily install side cover and gasket.