The Muncie A20 Series 10-bolt clutch shift power take-off, part number A20-A1011-SX11XPX or A20A1011SX11XPX, is a medium-duty PTO designed for Allison 3000 and 4000 Series transmissions. The shift cover rotates 360 degrees, and the pump flange is rotatable, giving installers flexibility in routing and positioning. Tapered roller bearings extend service life, and the increased-diameter output shaft adds durability under load. The clutch pack carries a single intermittent/continuous torque rating, simplifying application selection. Three housing arrangements and compatibility with the EX Drive shaft extension broaden installation options. Extended-length PTO mounting fasteners and increased clearance make the installation process more straightforward. Available from Pro Gear and Transmission. Call us to confirm proper fit for your application.
Features
Designed for Allison 3000 and 4000 Series transmissions
Clutch shift engagement with proven clutch pack design
Shift cover allows 360-degree rotation for flexible installation
Rotatable pump flange for versatile hydraulic hookup
Tapered roller bearings for extended PTO service life
Compatible with EX Drive shaft extension; three housing arrangements available
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) |
