• Easy Shift (ES)

    Easy shifting for driver comfort

    The shift rail profile and light touch design of our transmissions allow for smooth transitions in and out of neutral with each shift. Sliding clutches permit quicker, smoother shifts while increasing durability. A tight, ergonomic shift pattern is easier on drivers for improved comfort.

  • Extended Gear Ratios

    Unrivaled options for the job at hand

    Lo and lo-lo ratios mean exceptional maneuvering and slow speed control while our exclusive, shiftable multi-speed reverse allows for precision off-road driving. For highway cruising, overdrive is standard.

  • One-piece, Triple-countershaft Design

    Run cool and run longer

    Made of aluminum to lessen requirements for auxiliary transmission oil coolers, the case is compact to improve driveline angles. The triple-countershaft design disperses load between three shafts versus two shafts, lowering the stress on components.

  • Shiftable Multi-Speed Reverse

    Drive on your terms

    Our exclusive shiftable multi-speed reverse is invaluable in applications operating in reverse for extended time periods or over long distances. Shifting through different reverse speeds in the same pattern as the forward gears means reduced cycle time and more flexibility, control and versatility.

  • Uptime by Design

    Countershafts are forged alloy steel with both integral and pressed-on gears. Tapered roller bearings, which have the highest load carrying capacity in the smallest envelope, ensure a smooth and long operating life.

  • Serious Weight Savings

    The lightweight one-piece aluminum case and clutch housings makes for more efficient driving—allowing you to get more done and improve your bottom line.

  • Assembled in the USA

    We take pride in being homegrown. All Mack engines, transmissions and drivelines are assembled in Hagerstown, MD USA.

  • Maintenance Intervals

    +

    mDRIVE™

    Normal Duty

    Greater than 6 mpg Less than 39L/100km

    Heavy Duty

    Greater than 5 mpg Less than 50L/100km

    Severe Duty

    Less than 5 mpg Greater than 50L/100km

    Transmission oil and filter (Replace)

    Oil quality: Mack Transmission Oil 97318*

    Miles

    500,000

    Not Allowed

    Km

    800,000

    Not Allowed

    Hours

    60 months

    Not Allowed

    mDRIVE™; mDRIVE™ Severe Duty and mDRIVE™ with Crawler Gears

    Transmission oil and filter (Replace)

    Oil quality: Mack Transmission Oil 97319*

    * Approved oils only, lists can be made available

    Miles

    500,000

    250,000

    Km

    800,000

    400,000

    Hours

    60 months

    2,500

    T300 SERIES TRANSMISSION

    Highway Standard and Extended Oil (Replace)

    Miles

    Std: 250,000 / Ext: 500,000

    -

    Km

    Std: 400,000 / Ext: 800,000

    -

    Hours

    Std: 24 months / Ext: 36 months

    -

    Vocational Standard and Extended Oil (Replace)

    Miles

    -

    Std: 40,000 / Ext: 80,000

    Km

    -

    Std: 64,000 / Ext: 128,000

    Hours

    -

    Std: 12 months / Ext: 12 months

    AXLES

    Rear Axle Oil (Replace)

    Miles

    500,000

    80,000

    Km

    800,000

    125,000

    Hours

    36 months

    12 months

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