Description
The Mack ATO3112D (mDRIVE) is a 12-speed automated manual transmission used in heavy-duty applications. It’s an overdrive splitter/range style gearbox built for drivability, fuel efficiency and consistent shifting under load.
Key features
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12-speed, two-pedal automated manual (AMT) for smoother shifting and easier operation
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High-torque design — commonly referenced as built to handle up to ~3,150 Nm in this family/spec
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Overdrive top gear (0.78) and low gear 11.73 shown in Mack vehicle specs listing ATO3112D
Spec No – SP 3190898
Serial No – 1100558822
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