The Muncie A20-A1008-HX51X or A20A1008HX51X is a medium-duty, clutch shift power take-off designed for Allison 3000 and 4000 series transmissions. It mounts via a 10-bolt pattern and ships in three housing arrangements, giving installers flexibility across chassis configurations. The shift cover rotates 360 degrees, and the pump flange is also fully rotatable, both features that simplify plumbing and hose routing at installation. Tapered roller bearings carry the output load for extended service life, and an increased-diameter output shaft adds durability under continuous hydraulic demand. The gear geometry is optimized to reduce operating noise, and reduced leak paths throughout the housing keep maintenance intervals manageable. Compatible with the Muncie EX Drive shaft extension.
Features
10-bolt clutch shift mounting for Allison 3000 and 4000 series transmissions
Three housing arrangements to fit varied chassis configurations
360-degree rotatable shift cover and rotatable pump flange for flexible plumbing
Tapered roller bearings for extended PTO service life
Increased output shaft diameter for higher durability under continuous load
Compatible with Muncie EX Drive shaft extension
Tech Specs
- Mounting: 10-bolt clutch shift
- Compatible transmissions: Allison 3000 Series, Allison 4000 Series
- Shift type: Clutch shift
- Housing arrangements: Three available
- Shift cover rotation: 360 degrees
- Pump flange: Rotatable
- Output shaft: Increased diameter
- Bearing type: Tapered roller
- EX Drive shaft extension: Compatible
Additional Information
| SPEED | 3000 SERIES | 4000 SERIES | INTERMITTENT CONTINUOUS HP (KW) | INTERMITTENT/CONTINOUS |
| RATIO | ENGINE % | ENGINE % | HP (KW) @ 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) |
