Content ID

102739

Mack's Automated Manual Tranny

Mack Trucks is offering a transmission advance that could prove to be ideal for agriculture use. It’s an automated manual transmission with low-reduction gear ratios.

Available in direct or overdrive configurations, Mack’s mDrive HD 13-speed transmission is equipped with a low-reduction gear ratio designed for easier starting on steep grades or for when the truck is under heavy load. The Mack mDrive HD 14-speed, available only in an overdrive configuration, adds a second ultra-low speed-reduction gear designed for low-speed, heavy-haul maneuvering. 

This two-pedal transmission provides up to 2,060 foot-pounds of torque and horsepower ratings from 315 hp. to 605 hp. Both transmissions offer up to four reverse gear ratios. You can watch a video illustrating the new transmissions at macktrucks.com/trucks/mdrive-hd/.  

The HD designation describes a transmission upgrade featuring tougher gears and synchronizers compared with previous Mack mDrive transmission models originally introduced in March 2010. The mDrive HD will be standard equipment in Mack Granite vocational trucks and tractors, and will be available in the Titan extra-heavy-duty model.

“The mDrive HD is just as at home on the highway as it is on the job site,” says Stu Russoli of Mack. “Highway customers with challenging loads will appreciate the extra flexibility provided by the low-reduction gear ratios.”

The mDrive HD models share their architecture with the standard mDrive transmissions, which feature reinforced internal components and the same gear ratios for the 12 forward speeds. The addition of the low-reduction and multispeed reverse gears is made possible by a short extension added to the front of the transmission case.

Despite the additional capabilities, the new mDrive HDs are less than 5 inches longer and only 90 pounds heavier than a standard transmission. As a result, the new tranny offers a weight advantage of nearly 150 pounds compared with automatic transmissions.

You interact with the mDrive HD unit through a dash-mounted control pad containing manual input and hold-shift buttons. 

The Mack Co-Pilot driver display in the center of the instrument panel provides you with transmission status, including the number of upshifts or downshifts available, the current gear, and the current operating mode (such as Economy or Performance).

Read more about
Loading...

Machinery Talk

Most Recent Poll

Will you have enough on-farm storage for harvest?

I just want to see the responses
46% (22 votes)
Yes
35% (17 votes)
No, it’s going to be a bin-buster
8% (4 votes)
Maybe, depending on yields
6% (3 votes)
No, I am looking at new bins or temporary storage
4% (2 votes)
Total votes: 48
Thank you for voting.