Muncie power take off (PTO) series guide
Muncie builds PTOs for almost every truck transmission in North America. Knowing which family yours belongs to is the first step to the right parts.
What a PTO does
A power take-off borrows engine power from the transmission and turns it into a rotating shaft that drives something else: most often a hydraulic pump, sometimes a blower, a vacuum pump, a water pump or a generator. A side mount PTO bolts to a 6-bolt or 8-bolt opening on the side of the transmission and is driven by a gear inside it. Rear mount PTOs take their drive from the back of certain automated transmissions, and split shaft PTOs sit in the driveline itself.
The Muncie PTO families
| Family | Muncie series | Where you find them |
|---|---|---|
| Gear shift, side mount | TG, SH, 82, 8405A and 8406A, SG, Alpha A1, RG, RL and 83 | Manual and automatic transmissions with a 6-bolt or 8-bolt opening; shifted by lever, cable, air or electric controls |
| Clutch shift, side mount | CS6 and CS8, CS10 and CS11, CS12, CS20 and CS21, CS24 and CS25, HS24, CS40 and CS41, PowerClutch | Mostly automatic transmissions, where a wet clutch pack lets the PTO engage from the cab without stopping the gears |
| Allison 3000 and 4000, 10-bolt | A20, A30, A40 and A50, MC1 and MD1 (the Titan class), EX Drive | Medium and heavy duty Allison automatics, in clutch shift and constant drive versions |
| Ford | FR and FA, FR66, FR6Q, F20 and F22 | Ford Super Duty automatics: TorqShift, 6R140 and 10R140 |
| PACCAR TX-8 and Ram | Z21 and Z25, P58 | PACCAR TX-8 in medium duty Peterbilt and Kenworth trucks, and the Ram TorqueFlite HD |
| Rear mount | RS, RC and RM | Volvo I-Shift, Mack mDRIVE, Eaton Endurant and Detroit DT12 automated transmissions |
| Constant drive | CD05 and CD10, CD40, plus the A30, A50 and MD1 | No clutch or shifter: the output turns whenever the transmission PTO gear turns, for live drive equipment |
| Split shaft | SS66 and SS88, SSH2 and SSV2 | Mounted in the main driveshaft to run heavy equipment while parked |
| Accessories | Adapters, shaft extensions and EX Drive, GB gear boxes | Change rotation, clear obstructions, move a pump to where it fits, or add ratios on a front mount drive |
Shift types
- Lever and cable shift: a mechanical link from the cab moves the shift fork. Simple and common on older trucks; the cable is a wear item.
- Air shift: truck air pressure moves a piston in the shift cover. Muncie systems need roughly 65 psi before the protection valve lets air through.
- Electric shift: Muncie's Lectra Shift and E-Hydra Shift options shift a gear type PTO with a switch instead of a cable.
- Clutch shift: a hydraulic or air applied clutch pack engages the PTO, which allows engagement with the transmission turning. Most automatic transmission PTOs work this way.
Speed ratio and rating
Each Muncie model is built in several speed ratios, usually written as a two digit code in the model number. The ratio sets how fast the output shaft turns compared with the engine, and with it how much torque the PTO can carry. The series pages list the published intermittent and continuous ratings by ratio where Muncie publishes them in the standard format. Run a PTO at full load for more than a few minutes and the continuous rating, not the intermittent one, is the number that matters.
How to identify your Muncie PTO
Read the model number off the tag or stamping on the housing and match the first letters to a family above. If there is no tag, the bolt pattern, the transmission, the shift method and the output (round keyed shaft, splined pump mount or companion flange) narrow it down. The model number guide explains the codes, and you can always send us a photo.
Common applications
Dump bodies and dump trailers, refuse packers, wreckers and rollbacks, cranes and aerial devices, walking floor and ejector trailers, tankers, vacuum trucks, dry bulk blowers, winches and fire apparatus all run off a PTO. The application decides the series, the ratio and the output, which is why we ask what the PTO drives before we quote a unit.
Get a quote on Muncie PTO parts
Send the model number off the PTO tag, a part or item number, or simply what the PTO is bolted to. A parts specialist answers during business hours.