The Chelsea 880 Series Power Take-Off, part number 880XJAKX-M6XS or 880XJAKXM6XS, is an 8-bolt, heavy-duty PTO built for high-torque, constant-mesh applications. It uses a lever mechanical shift and delivers up to 500 lb-ft intermittent torque (678 Nm). The output shaft is a 1-1/2"-10T spline with a 1410 companion flange, suited for driveline connections. Shaft power ratings are 48 HP at 500 RPM and 95 HP at 1000 RPM. The cast iron housing accepts a dual-pump configuration, allowing a hydraulic pump to mount on each end. Compatible with Volvo/Mack, Allison, and Eaton/Fuller transmissions, among others. A genuine Chelsea part from Pro Gear and Transmission. Call us to confirm proper fit for your transmission and application.

The Chelsea 880 Series PTO is used across bulk hauler, fire truck, oil field, aerial, winch, and large truck recovery applications. The series supports continuous operation with a 30% de-rating. The removable shift cover allows backlash adjustment without removing the unit from the transmission. Part number 880XJAKX-M6XS is also referenced as SP880XJAKX-M6XS in some catalog systems.
Features
8-Bolt mounting for compatibility with most manual transmissions including Volvo/Mack, Allison, and Eaton/Fuller
Lever mechanical shift with constant mesh input gears
1-1/2"-10T spline output shaft with 1410 companion flange
Intermittent torque rating: up to 500 lb-ft (678 Nm) - check application pages for actual rating
Shaft power: 48 HP at 500 RPM, 95 HP at 1000 RPM
Dual-pump output allows a hydraulic pump to mount on each end of the PTO
Cast iron housing with removable shift cover for simplified backlash adjustment
Tech Specs
- INTERMITTENT TORQUE: 401-500 lb-ft (501+ Nm) | 500 lb-ft / 678 Nm (Check Application Pages for Actual Torque Ratings)
- SHIFT TYPE: Lever Mechanical
- MOUNTING TYPE: 8-Bolt
- OUTPUT SHAFT TYPE: 1-1/2" - 10T Spline with 1410 Companion Flange
- OUTPUT POWER: 56+ HP (51+ kW)
- SHAFT POWER: 48 HP at 500 RPM, 95 HP at 1000 RPM (36 kW at 500 RPM, 71 kW at 1000 RPM)
- TRANSMISSION COMPATIBILITY: Volvo/Mack, Allison, Eaton/Fuller, Other
Additional Information

The Chelsea 880 Series PTO is used across bulk hauler, fire truck, oil field, aerial, winch, and large truck recovery applications. The series supports continuous operation with a 30% de-rating. The removable shift cover allows backlash adjustment without removing the unit from the transmission. Part number 880XJAKX-M6XS is also referenced as SP880XJAKX-M6XS in some catalog systems.
Parts Manual: Chelsea 880 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.