OPERATION 187 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. Note: If your vehicle is equipped with a transmission other than a MACK transmission, please refer to the applicable transmission operator’s manual supplied with your vehicle.
