The Chelsea 880 Series Power Take-Off Assembly, part number 880XGAKP-A4AZ or 880XGAKPA4AZ, is an 8-bolt, lever mechanical shift PTO rated for up to 500 lb-ft intermittent torque. The output shaft is a 1-1/2" 10-spline with a 1410 companion flange, suited for high-torque driveline demands. Shaft power output reaches 48 HP at 500 RPM and 95 HP at 1000 RPM, with output power rated at 56+ HP. The cast iron housing fits manual transmissions from Volvo/Mack, Allison, and Eaton/Fuller, among others. The 880 Series is used in bulk hauling, fire truck, oil field, aerial, and large truck recovery applications. A genuine Chelsea part available from Pro Gear and Transmission. Call us to confirm proper fit for your application.

The Chelsea 880 Series is suited for bulk haulers, fire trucks, oil field equipment, aerial units, winch systems, and large truck recovery. Continuous operation is supported with a 30% de-rating applied. Tapered cone bearings provide load bearing capacity under sustained high-torque use. The removable shift cover allows more accurate backlash adjustment during installation. The 880 Series also supports dual-pump output, allowing a pump to be mounted on each end of the PTO.
Features
8-bolt mounting for compatibility with most manual transmissions including Volvo/Mack, Allison, and Eaton/Fuller
Lever mechanical shift with optional air control shift available
1-1/2" 10-spline output shaft with 1410 companion flange
Intermittent torque rating up to 500 lb-ft (678 Nm) - check application pages for actual ratings
Shaft power output: 48 HP at 500 RPM, 95 HP at 1000 RPM
Rugged 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)
- Transmission Manufacturer: Volvo/Mack, Allison, Eaton/Fuller, Other
- Shift Type: Lever Mechanical
- Output Power: 56+ HP (51+ kW)
- Output Shaft Type: 1-1/2" 10-spline with 1410 companion flange
- Mounting Type: 8-Bolt
- Shaft Power: 48 HP (500 RPM), 95 HP (1000 RPM) / 36 kW (500 RPM), 71 kW (1000 RPM)
Additional Information

The Chelsea 880 Series is suited for bulk haulers, fire trucks, oil field equipment, aerial units, winch systems, and large truck recovery. Continuous operation is supported with a 30% de-rating applied. Tapered cone bearings provide load bearing capacity under sustained high-torque use. The removable shift cover allows more accurate backlash adjustment during installation. The 880 Series also supports dual-pump output, allowing a pump to be mounted on each end of the PTO.
Parts Manual: Chelsea 880 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.