The Mack mDRIVE® HD 13CR is a 13-speed heavy-duty automated manual transmission (AMT) engineered for vocational and off-highway trucks that need extreme pulling power and precise low-speed control. The “HD” designation identifies its reinforced construction, while “13CR” specifies a 13-speed gearbox with a deep-reduction creeper gear, giving drivers the ability to manage heavy loads, steep grades, and soft terrain with confidence.
Designed for seamless integration with Mack MP® engines, the mDRIVE HD 13CR leverages electronic shift logic and robust internals to provide smooth, fuel-efficient operation in the toughest environments. Its heavy-duty design delivers maximum torque capacity, while eliminating the need for a clutch pedal—reducing fatigue and making it easier for any driver to operate.
Key Features
- Automated Manual Transmission (AMT) for improved fuel economy and reduced driver fatigue
- 13 forward speeds including a deep-reduction creeper gear for maximum startability under heavy load
- Heavy-duty construction designed for severe-duty and vocational applications
- Automated two-pedal design improves driver comfort and reduces training time
- Integrated grade-assist functions: Grade Gripper, Rock Free, Power Launch, and Enhanced Construction Shift for superior control in tough conditions
- Direct drivetrain integration with Mack MP8, MP8HE, and MP13 engines for optimized performance
- PTO compatibility with multiple configurations for dump, mixer, and vocational equipment
- Lightweight yet durable aluminum housing reduces overall truck weight without sacrificing strength
Technical Specifications
- Type: Heavy-Duty Automated Manual Transmission (HD AMT)
- Speeds: 13 forward (with creeper), multiple reverse ratios
- Torque Capacity: Up to 2,060 lb-ft (application dependent)
- Shift Control: Electronic, dash-mounted selector with selectable drive modes
- Weight: ~780–800 lbs (varies by build and PTO options)
- Lubrication: Synthetic oil with extended service intervals for reduced downtime
