Suzuki Wagon R Manual page 4006

MANUAL TRANSAXLE (Z12XEP ENGINE MODEL) 7A5-29
11) Install drive gear (1) onto main shaft using special tool and
hydraulic press.
Special tool
(A): 09925-18310
12) Install new snap ring (1) to main shaft using snap ring plier.
NOTE:
Always replace drive gears in pairs.
13) Install 2nd gear (4) onto main shaft.
14) Install inner synchronizer ring (3) onto cone of the gear so
that lugs are seated in grooves of gear.
15) Install intermediate ring (2) on outer synchronizer ring.
16) Install outer synchronizer ring (1) onto intermediate ring so
that grooves are seated on lugs of inner synchronizer ring.