Opel 1900 1973 Service Manual page 379

1973 OPEL SERVICE MANUAL
MAIN DRIVE GEAR (INPUT)
COUNTERSHAFT GEAR UNIT REVERSE SPEED GEAR
REVERSE IDLER GEAR
1st AND 2nd SPEED SLIDING GEAR GUIDE UNIT
Reverse Speed
Through the engagement of the reverse idler gear
with the 1st and 2nd gear sliding gear (mainshaft)
and the countershaft gear unit reverse speed gear, the
drive is bridged between the countershaft gear unit
and the mainshaft through the guide unit. The direc-
tion of the mainshaft is reversed. The guide unit is
located between the 1st and 2nd gear sliding gear and
the mainshaft. The guide unit is internally splined to
the 1st and 2nd gear sliding gear, and it is externally
splined to the mainshaft. The 3rd speed gear, 2nd
speed gear, and the 1st speed gear are all idling. With
a reverse
gear (input) must turn 3.317 revolutions for every
one revolution of the mainshaft (output). The "- '
sign indicates that the direction of rotation of the
mainshaft is opposite that of the main drive gear.
POWER FLOW - REVERSE SPEED
COUNTERSHAFT GEAR UNIT DRIVE GEAR
REVERSE IDLER GEAR
MAINSHAFT
Figure 76.6
speed
gear ratio of -3.3 17: 1, the main drive
GUIDE
(OUTPUT)
UNIT