The Muncie A20-A1008-HR31XPX or A20A1008HR31XPX is a medium-duty, clutch shift power take-off engineered for Allison 3000 and 4000 Series transmissions. It mounts with a 10-bolt pattern and features a shift cover that rotates a full 360 degrees, giving technicians real flexibility when fitting the unit to tight engine bays. A rotatable pump flange and increased component clearances simplify installation further. Tapered roller bearings extend service life, and the enlarged output shaft diameter adds durability under sustained load. The gear set is designed specifically to minimize operating noise, and reduced leak paths keep maintenance intervals manageable. Three housing arrangements and compatibility with the EX Drive shaft extension make this unit adaptable to a range of truck configurations. Call us to confirm proper fit for your application.
Features
10-bolt clutch shift PTO for Allison 3000 and 4000 Series transmissions
Shift cover with full 360-degree rotation for flexible mounting orientation
Rotatable pump flange and increased clearance for easier installation
Tapered roller bearings for extended PTO service life
Enlarged output shaft diameter for added durability under sustained load
Compatible with EX Drive shaft extension; three housing arrangements available
Tech Specs
- Mounting: 10-bolt
- Shift type: Clutch shift
- Transmission application: Allison 3000 Series and 4000 Series
- Shift cover rotation: 360 degrees
- Housing arrangements: 3
- EX Drive shaft extension compatible: Yes
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) |
