The Muncie A20-A1011-SX31X or A20A1011SX31X is a medium-duty clutch shift power take-off engineered for Allison 3000 and 4000 Series transmissions. It mounts via a 10-bolt interface and features a rotatable pump flange with a shift cover that allows 360-degree rotation, giving installers flexibility in tight engine bays. A proven clutch pack design works alongside tapered roller bearings to extend PTO service life, while an increased-diameter output shaft adds durability under load. Gear geometry is optimized to minimize operating noise, and reduced leak paths limit fluid loss points. Three housing arrangements are available, and the unit accepts the EX Drive shaft extension. Extended-length PTO mounting fasteners are included. Call Pro Gear and Transmission to confirm the correct configuration for your application.
Features
10-bolt clutch shift PTO designed for Allison 3000 and 4000 Series transmissions
Rotatable pump flange with shift cover allowing 360-degree rotation
Tapered roller bearings and increased-diameter output shaft for extended service life
Proven clutch pack design with single intermittent/continuous torque rating
Three housing arrangements available; compatible with EX Drive shaft extension
Extended-length PTO mounting fasteners and reduced leak paths included
Tech Specs
- Mounting: 10-bolt
- Shift type: Clutch shift
- Application: Allison 3000 Series and 4000 Series transmissions
- Shift cover rotation: 360 degrees
- Pump flange: Rotatable
- Housing arrangements: Three
- Drive shaft extension compatibility: EX Drive shaft extension
- Speed 5 - 3000 Series engine %: 74% / 4000 Series engine %: 105% / HP (kW) @ 1,000 RPM: 77 (57) / Torque lbs.ft. (Nm): 400 (542)
- Speed 6 - 3000 Series engine %: 85% / 4000 Series engine %: 122% / HP (kW) @ 1,000 RPM: 77 (57) / Torque lbs.ft. (Nm): 400 (542)
- Speed 7 - 3000 Series engine %: 99% / 4000 Series engine %: 141% / HP (kW) @ 1,000 RPM: 79 (59) / Torque lbs.ft. (Nm): 415 (563)
- Speed 8 - 3000 Series engine %: 114% / 4000 Series engine %: 163% / HP (kW) @ 1,000 RPM: 69 (51) / Torque lbs.ft. (Nm): 360 (488)
- Speed 9 - 3000 Series engine %: 122% / 4000 Series engine %: 175% / HP (kW) @ 1,000 RPM: 65 (48) / Torque lbs.ft. (Nm): 340 (461)
- Speed 10 - 3000 Series engine %: 131% / 4000 Series engine %: 187% / HP (kW) @ 1,000 RPM: 59 (44) / Torque lbs.ft. (Nm): 310 (420)
Additional Information
| SPEED | 3000 SERIES | 4000 SERIES | INTERMITTENT CONTINUOUS HP (KW) | INTERMITTENT/CONTINOUS |
| RATIO | ENGINE % | ENGINE % | @ 1,000 RPM | TORQUE LBS.FT. (NM) |
| 5 | 74% | 105% | 77 (57) | 400 (542) |
| 6 | 85% | 122% | 77 (57) | 400 (542) |
| 7 | 99% | 141% | 79 (59) | 415 (563) |
| 8 | 114% | 163% | 69 (51) | 360 (488) |
| 9 | 122% | 175% | 65 (48) | 340 (461) |
| 10 | 131% | 187% | 59 (44) | 310 (420) |
| 11 | 151% | 215% | 52 (39) | 275 (373) |
| 12 | 162% | 231% | 50 (37) | 265 (359) |
| 15 | 201% | 287% | 39 (29) | 205 (278) |
