186 OPERATION TRANSMISSION SHIFTING INSTRUCTIONS
CAUTION The maximum safe operating oil temperature for MACK transmissions is 121°C (250°F) for mineral-based oil, and 148°C (300°F) for synthetic-based oil. Continued operation with oil above this temperature will result in rapid deterioration of the oil’s lubricating properties and is NOT recommended.
CAUTION To avoid transmission damage, the vehicle must be completely stopped before being shifted from REVERSE to any forward speed (and vice versa).
CAUTION Never coast with the transmission in neutral. Never coast with the clutch depressed.
Shifting Instructions for Allison Automatic Transmissions Please refer to the applicable Allison automatic transmission operator’s manual provided with your vehicle for complete shifting and operating instructions.
MACK T306G Shifting Instructions The T306G is a six-speed overgear, non-synchronized transmission designed for general highway use. Shifting is accomplished through a single shift lever using the traditional H pattern. Upshift — Start out in first gear and shift up to second, third, fourth, fifth and sixth gears, double-clutching from one gear to the next. Downshift — Downshift in reverse order (sixth through first), double-clutching through each gear.
