Mack's Cummins X10 and Allison Pairing: The Granite's First Factory Torque-Converter Automatic

For more than a decade, if you wanted a Mack Granite, you got a Mack engine and Mack's mDRIVE automated manual transmission underneath it. That was the deal. Mack built its own powertrain in-house, and the Granite was the showcase for it. With the all-new Granite that debuted at ConExpo 2026, that's no longer the only deal on the table. Mack now offers the Granite with a Cummins X10 engine paired to an Allison 3000 or 4000 Series automatic transmission — a genuine torque-converter automatic, not an automated manual. It's the first time Mack has put a factory torque-converter pairing on its flagship vocational chassis, and for ready-mix operators, demolition haulers, and aggregate fleets who've spent years watching Allison-equipped competitors, it's worth understanding exactly what changed.

What's Actually New Here

Mack's own MP13 stays the flagship option on the redesigned Granite, now rated up to 540 horsepower and 1,950 lb-ft of torque under the EPA27 recalibration, paired exclusively with Mack's mDRIVE HD automated manual in 12-, 13-, and 14-speed configurations. That combination isn't going anywhere, and we've covered it in detail separately. The new piece is the alternative powertrain: a Cummins X10, a 10-liter engine rated across a 350 to 450 horsepower band with 1,250 to 1,650 lb-ft of torque, bolted to an Allison 3000 or 4000 Series automatic — the same family of torque-converter transmissions that's been the default choice on a lot of competitive vocational chassis for years.

The distinction between an automated manual and a true automatic isn't academic. An AMT like mDRIVE HD is still a manual gearbox at its core, with an actuator doing the clutch and shifting work a driver used to do by hand. A torque-converter automatic like the Allison RDS Series uses fluid coupling instead of a dry clutch, which means power keeps flowing to the wheels even when the transmission is between gears. On a mixer truck creeping up to a pour site, or a dump truck launching loaded out of a pit a dozen times a day, that difference shows up as smoother, more controllable low-speed power delivery — which is exactly why Allison built an entire business around vocational and mixer applications.

Why Mack Waited This Long

Mack has had good reasons to stick with its own powertrain. Building the engine and transmission in-house lets Mack tune the two to work together, and the mDRIVE HD has earned real credibility in the vocational market over the past several years. But it also meant that any contractor who specifically wanted Allison's torque-converter feel — and plenty do, especially in ready-mix and refuse applications where Allison has decades of application-specific calibration — had to look at a Kenworth T880 with an Allison 4700 RDS, an International HX with an Allison option, or a Freightliner chassis instead. Adding the Cummins X10 and Allison pairing to the Granite closes that gap without forcing Mack to build its own torque-converter unit from scratch.

Who Actually Wants the Torque Converter

This isn't a pairing every Granite buyer needs. A tri-axle dump truck running steady highway miles to and from a quarry, with long stretches at cruising speed, is still well served by the MP13 and mDRIVE HD combination — the AMT's efficiency advantage shows up most on exactly that kind of duty cycle.

The Cummins X10 and Allison pairing makes the most sense for duty cycles built around stop-start power delivery: a ready-mix mixer truck working a tight urban pour site, backing into position dozens of times a shift; a demolition debris hauler navigating a cluttered lot where precise, creeping throttle control matters more than top-end horsepower; or a multi-shift operation where driver turnover means you want a transmission that's forgiving for a less experienced operator behind the wheel. Allison's torque-converter automatics are also widely serviced — a real consideration if your shop, or your preferred dealer's shop, already has Allison-trained technicians working on other equipment in your yard.

Named Trades Where This Pairing Shows Up Most

Ready-mix concrete suppliers running tight urban delivery routes get the clearest, most direct benefit from the torque-converter's smooth low-speed power delivery, since a mixer truck's whole operating rhythm is built around repeated creeping, positioning, and stopping at a pour site. Demolition debris haulers working cluttered, uneven lots — where precise throttle control at walking speed matters more than top-end power — are a close second. Multi-shift aggregate haulers running two drivers on one truck across a long operating day also have a reasonable case for the Allison pairing simply because torque-converter automatics are generally considered more forgiving to drive consistently well across drivers with different skill levels and experience, which matters when the same truck changes hands mid-shift.

The Rent-vs-Own Math on a New Powertrain Option

A newly available powertrain combination is exactly the kind of decision point where renting looks tempting — why commit to financing a configuration that's brand new to this chassis when you could rent one first and see how it performs? The honest answer is that renting a dump truck or mixer by the day is almost always the more expensive path once you're running consistent, predictable route volume, and it leaves you with nothing to show for the payments at the end of the season. The Cummins X10 and Allison pairing isn't an experimental powertrain — Cummins and Allison have each built these components for years across other chassis, Mack has simply added them to the Granite's own order guide. Financing a Granite spec'd this way carries the same equipment-loan logic as any other configuration: a predictable monthly payment against a truck you're building equity in, instead of a daily or weekly rental rate with no ownership stake.

Financing a Mack Granite With the Cummins X10 Option

At BFC, we structure equipment financing and equipment leasing for contractors adding a Mack Granite to their fleet regardless of which powertrain they spec. Lenders look at the same fundamentals either way: time in business, the applicant's credit profile, and the truck's resale pool. Because the Cummins X10 and Allison combination is also used across other vocational applications, it carries a reasonably established resale and parts-support history even though it's new specifically to the Granite — which matters when a lender is underwriting a construction equipment loan against the truck as collateral. If you're comparing this new option against Mack's own MP13 and mDRIVE HD lineup, or weighing it against how Allison's RDS Series stacks up against Mack's automated manual in general, it's worth reading both before you lock in a spec sheet.

The axle lineup on the redesigned Granite also now spans 4x2, 6x4, 8x4, 8x6, and a 10x4 configuration for operations that need maximum driven-axle traction and payload — the powertrain choice doesn't restrict which rear-axle configuration you can order, so a ready-mix fleet specifying the Cummins X10 and Allison combination for a tandem mixer isn't giving up any of the Granite's axle flexibility to get it.

What to Ask Your Dealer Before You Order

Because this is a new pairing specifically on the Granite platform, it's worth confirming a few practical details directly with your dealer before placing an order: production lead time for this specific configuration versus the standard MP13 and mDRIVE HD build, whether any body-builder or PTO provisions differ between the two powertrain options, and what the warranty structure looks like given that the engine, transmission, and chassis now come from three separate manufacturers rather than two. None of these questions should be dealbreakers, but getting clear answers up front avoids surprises once the truck is on order and a delivery date is already set.

A Florida-Specific Note for Ready-Mix Fleets

South Florida's ready-mix operators run a particularly unforgiving duty cycle: short delivery windows dictated by concrete's set time, dense urban job sites with tight maneuvering, and a construction calendar that doesn't really slow down in the winter the way it does further north. That's close to the textbook case for a torque-converter automatic. A mixer crew that's run Allison-equipped trucks from other brands for years and is now cross-shopping a Granite has a real reason to look at the Cummins X10 pairing specifically, rather than assuming the Mack badge means an automated manual is the only option.

Ready to Put This Truck to Work?

Whether you are financing your first truck or adding another chassis to a growing fleet, BFC Equipment Loans structures equipment financing and equipment leasing specifically for construction, hauling, and ready-mix operators. Visit our home page to learn more about how we work, or go straight to our equipment financing application if you are ready to get started. Browse current dump trucks, mixer trucks, and other equipment for sale in our inventory marketplace, and subscribe to our blog for more coverage of Kenworth, Mack, International, and Freightliner trucks as new models and financing options come available.