Mack CSM 2010, Operator'S Handbook Manual

Page: 152 / 232

144 OPERATION
CAUTION
• Always start in LO range according to
shift marker plate instructions. Never start
in a gear higher than fourth speed gear,
even when dynamometer testing.
• When the truck is stationary, do not shift
into HI range and then start moving the
truck. Damage to the synchronizer can
result.
• Be careful not to overspeed the
engine during downshifting. Damage to
powertrain components may result.
Reverse — Reverse can be used in LO only. To make a range shift in reverse, bring the
truck to a complete stop. Flip the range selector lever to range desired (preselect). Move the
shift lever out of reverse through NEUTRAL and then back into reverse again. As the lever
moves through NEUTRAL, the range shift will be completed.
CAUTION
To avoid transmission damage, do NOT
change range while moving in REVERSE.