The Muncie A20-A1011-HR31XPX or A20A1011HR31XPX is a medium-duty, clutch shift power take-off from Muncie's A20 Series, engineered specifically for Allison 3000 and 4000 Series transmissions. The 10-bolt mounting pattern pairs with a shift cover that rotates 360 degrees, letting technicians orient the control in tight engine bays. A rotatable pump flange adds further flexibility at installation. Tapered roller bearings extend service life, an enlarged output shaft diameter handles higher-demand applications, and the gear geometry is optimized to keep noise down. Three housing arrangements are available within the series, and the unit is compatible with the EX Drive shaft extension. Call us to confirm the right configuration for your truck.
Features
10-bolt clutch shift design for Allison 3000 and 4000 Series transmissions
360-degree rotatable shift cover for flexible cab or chassis control routing
Rotatable pump flange simplifies hydraulic plumbing during installation
Tapered roller bearings for extended PTO service life
Increased output shaft diameter for higher-demand drive requirements
Compatible with EX Drive shaft extension; three housing arrangements available within the A20 Series
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) |
