The Muncie A20-A1005-SX5BB or A20A1005SX5BB is a medium-duty, 10-bolt clutch shift power take-off engineered for Allison 3000 and 4000 series transmissions. It belongs to Muncie's A20 Series, which features a rotatable pump flange, a shift cover with 360-degree rotation, and a proven clutch pack design. Tapered roller bearings extend PTO service life, and an increased output shaft diameter adds durability under load. The design incorporates reduced leak paths and a maximized gear profile for noise reduction. Three housing arrangements are available, and the unit is compatible with the EX Drive shaft extension. Extended-length PTO mounting fasteners are included. Call us to confirm the correct housing arrangement and gear ratio for your specific application.
Features
Clutch shift engagement, 10-bolt mounting pattern for Allison 3000 and 4000 series transmissions
Rotatable pump flange with 360-degree shift cover rotation for flexible installation
Tapered roller bearings for extended PTO service life
Increased output shaft diameter for added durability under load
Reduced leak paths and maximized gear design for quieter operation
Compatible with EX Drive shaft extension; three housing arrangements available
Tech Specs
- Mounting: 10-bolt
- Shift type: Clutch shift
- Compatible transmissions: Allison 3000 Series, Allison 4000 Series
- 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) intermittent/continuous 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) intermittent/continuous 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) intermittent/continuous 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) intermittent/continuous 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) intermittent/continuous 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) intermittent/continuous torque
- Speed ratio 11: 151% engine speed (3000 Series), 215% engine speed (4000 Series), 52 HP (39 kW) @ 1,000 RPM, 275 lb.ft. (373 Nm) intermittent/continuous torque
- Speed ratio 12: 162% engine speed (3000 Series), 231% engine speed (4000 Series), 50 HP (37 kW) @ 1,000 RPM, 265 lb.ft. (359 Nm) intermittent/continuous torque
- Speed ratio 15: 201% engine speed (3000 Series), 287% engine speed (4000 Series), 39 HP (29 kW) @ 1,000 RPM, 205 lb.ft. (278 Nm) intermittent/continuous torque
- Housing arrangements: 3
- Shaft extension compatibility: EX Drive shaft extension
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) |
