The Muncie A20-A1005-SX31X or A20A1005SX31X is a medium-duty, clutch shift power take-off from the Muncie A20 Series, designed specifically for Allison 3000 and 4000 Series transmissions. The shift cover rotates 360 degrees for flexible installation, and a rotatable pump flange simplifies plumbing orientation. Tapered roller bearings support extended service life, and the increased-diameter output shaft adds durability under load. Reduced leak paths and extended-length mounting fasteners address common field complaints with earlier PTO generations. The unit carries a single intermittent/continuous torque rating and is available in three housing arrangements. Compatible with the Muncie EX Drive shaft extension. Call us to confirm proper fitment for your application.
Features
Clutch shift engagement, 10-bolt mounting, for Allison 3000 and 4000 Series transmissions
Shift cover allows 360-degree rotation for flexible installation positioning
Rotatable pump flange simplifies hydraulic plumbing layout
Tapered roller bearings for extended PTO service life
Increased output shaft diameter for greater durability under load
Compatible with Muncie EX Drive shaft extension; three housing arrangements available
Tech Specs
- Mounting: 10-bolt
- Shift type: Clutch shift
- Application: Allison 3000 Series and 4000 Series transmissions
- Shift cover rotation: 360 degrees
- Bearings: Tapered roller
- Housing arrangements: Three
- EX Drive shaft extension compatible: Yes
- Torque rating: Single intermittent/continuous rating
- Speed ratio 5: 74% engine speed (3000 Series), 105% engine speed (4000 Series), 77 HP (57 kW) @ 1,000 RPM, 400 lb.ft. (542 Nm) torque
- Speed ratio 6: 85% engine speed (3000 Series), 122% engine speed (4000 Series), 77 HP (57 kW) @ 1,000 RPM, 400 lb.ft. (542 Nm) torque
- Speed ratio 7: 99% engine speed (3000 Series), 141% engine speed (4000 Series), 79 HP (59 kW) @ 1,000 RPM, 415 lb.ft. (563 Nm) torque
- Speed ratio 8: 114% engine speed (3000 Series), 163% engine speed (4000 Series), 69 HP (51 kW) @ 1,000 RPM, 360 lb.ft. (488 Nm) torque
- Speed ratio 9: 122% engine speed (3000 Series), 175% engine speed (4000 Series), 65 HP (48 kW) @ 1,000 RPM, 340 lb.ft. (461 Nm) torque
- Speed ratio 10: 131% engine speed (3000 Series), 187% engine speed (4000 Series), 59 HP (44 kW) @ 1,000 RPM, 310 lb.ft. (420 Nm) torque
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) |
