The Muncie A20-A1005-JX3II or A20A1005JX3II is a medium-duty, 10-bolt clutch shift power take-off designed for Allison 3000 and 4000 series transmissions. Part of Muncie's A20 Series, it features a rotatable pump flange and a shift cover with full 360-degree rotation, making mounting position flexible on the truck. Tapered roller bearings extend service life, and an enlarged output shaft diameter adds durability under load. Gear geometry is optimized for noise reduction, and reduced leak paths keep maintenance intervals manageable. Three housing arrangements are available, and the unit is compatible with the EX Drive shaft extension. Call us to confirm the right configuration for your application.
Features
Designed for Allison 3000 and 4000 series transmissions
Clutch shift engagement with proven clutch pack design
Shift cover allows full 360-degree rotation for flexible installation
Rotatable pump flange and increased clearance simplify mounting
Tapered roller bearings for extended PTO service life
Compatible with EX Drive shaft extension; three housing arrangements available
Tech Specs
- Transmission Compatibility: Allison 3000 Series, Allison 4000 Series
- Shift Type: Clutch Shift
- Mounting: 10-Bolt
- Shift Cover Rotation: 360 degrees
- Output Shaft: Increased diameter for higher durability
- Housing Arrangements: Three available
- EX Drive Shaft Extension: Compatible
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) |
