MACK TM308M Shifting Instructions CAUTION

Make sur e air essur e least psi and unit warmed befor e shifting the Use the clutch brake for shifting into first and r everse gears only . not use the clutch brake shift out gear . car eful not overspeed the engine during downshifting. Damage powertrain components can r esult.

The TM308M a non - synchronized transmission having a total eight speeds (6+2) with a non - synchronized air shifted compound section. This and auxiliary compound section controlled air - shift range selector valve located the shift lever . The range has two low gear ratios. range there are six forward gears which can shifted the normal manner , but remember double - clutch whether moving down through the gears.

e , r s t g e a r and shift through fifth and The ratio step between fifth and sixth smaller than all the other ratio The two gears range are designed for f - highway use and slow - moving operations (curb material heavy steep

Reverse used range only . T o avoid transmission damage when shifting Forward Reverse Reverse Forward:

• Bring vehicle a stop.

• Move lever NEUTRAL.

• Select low range.

• Select F R

• Select lowest lever gear position.

• Release and depress clutch

• Select desired gear .

Caution

V ehicle operators must use extr eme caution operating a truck the higher r everse gears. Higher r everse gears will oduce high r everse speeds which may difficult for drivers contr dependent terrain obstacles.