Toro Workman HDX Service Manual page 121

16.Assemble reduction shaft and countershaft together
with R--1 fork shaft and Hi--Lo fork shaft.
17.Insert reduction shaft and countershaft assembly
into transaxle case. Insert heads of shift arms into
grooves of forks when installing them.
18.Assemble main shaft together with 2--3 fork shaft.
19.Insert main shaft and 2--3 fork shaft assembly into
transaxle case. Insert head of shift arm into groove of
fork while installing.
Workman HD Series Page 6 - - 45
Figure 87
Figure 88
Figure 89
Figure 90
Drive Train