The Muncie A20-A1007-HR3PBPX or A20A1007HR3PBPX is a medium-duty, 10-bolt clutch shift power take-off engineered specifically for Allison 3000 and 4000 Series transmissions. The A20 Series uses a proven clutch pack design with tapered roller bearings to extend service life, and features a rotatable pump flange paired with a shift cover that rotates a full 360 degrees, giving technicians real flexibility during installation. An increased output shaft diameter adds durability under load, while optimized gear geometry keeps noise down in operation. The unit accepts three housing arrangements and is compatible with the Muncie EX Drive shaft extension. Extended-length PTO mounting fasteners and increased installation clearance make fitting this unit straightforward. Call us to confirm proper fit for your specific truck and transmission configuration.
Features
10-bolt clutch shift design for Allison 3000 and 4000 Series transmissions
Rotatable pump flange with 360-degree rotating shift cover for flexible installation
Tapered roller bearings for extended PTO service life
Increased output shaft diameter for added durability under load
Three housing arrangements available; compatible with Muncie EX Drive shaft extension
Maximized gear design to reduce operating noise
Tech Specs
- Mounting: 10-bolt
- Shift type: Clutch shift
- Transmission application: Allison 3000 Series and Allison 4000 Series
- Ratings at 1,000 RPM (intermittent/continuous HP, kW): Speed 5 - 77 HP (57 kW); Speed 6 - 77 HP (57 kW); Speed 7 - 79 HP (59 kW); Speed 8 - 69 HP (51 kW); Speed 9 - 65 HP (48 kW); Speed 10 - 59 HP (44 kW)
- Engine speed percentage - 3000 Series: Speed 5 - 74%; Speed 6 - 85%; Speed 7 - 99%; Speed 8 - 114%; Speed 9 - 122%; Speed 10 - 131%
- Engine speed percentage - 4000 Series: Speed 5 - 105%; Speed 6 - 122%; Speed 7 - 141%; Speed 8 - 163%; Speed 9 - 175%; Speed 10 - 187%
- Torque rating: Single intermittent/continuous torque rating
- Housing arrangements: Three available
- Pump flange: Rotatable
- Shift cover rotation: 360 degrees
- Compatible shaft extension: Muncie EX Drive
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) |
