The Muncie RS6S-P89M3-P1DX or RS6SP89M3P1DX is a rear-mounted power take-off built specifically for Detroit DT12 transmissions in Freightliner Cascadia and Western Star 5700 Class 8 trucks. It features a solenoid-activated mechanical shift and is available with direct mount or companion flange output options, giving upfitters flexibility when specifying hydraulic pump installations. The unit takes advantage of the full torque capacity of the DT12 transmission and supports larger pumps without an additional bracket, subject to a bending moment limit of 29.5 ft.lb. maximum. Part of Muncie Power's RS6S-P89M series, this PTO is a genuine Muncie part sold by Pro Gear and Transmission. Call us to confirm proper fit for your application.
Features
Fits Detroit DT12 transmissions in Freightliner Cascadia and Western Star 5700 Class 8 trucks
Solenoid-activated mechanical shift for reliable PTO engagement
Available with direct mount or companion flange output options
Utilizes the full torque capacity of the DT12 transmission
Supports larger pumps without additional bracket (bending moment limit: 29.5 ft.lb. max)
1.8 internal gear ratio
Tech Specs

- Internal Ratio: 1.8
- Shift Type: Solenoid-activated mechanical shift
- Transmission Fit: Detroit DT12
- Vehicle Application: Freightliner Cascadia, Western Star 5700 (Class 8)
- Output Options: Direct mount or companion flange
- Bending Moment Limit: 29.5 ft.lb. maximum
Additional Information
| Model Number | Max Torque* lb-ft (Nm) | Max HP @ 1,000 RPM (kW) | Outputs | Internal Ratio |
|---|---|---|---|---|
| RS6S-P89M1-P1PX | 317 (430) | 60 (45) | SAE "BB" or 1410 Companion Flange | 0.97 |
| RS6S-P89M2-P1PX | 317 (430) | 60 (45) | SAE "BB" or 1410 Companion Flange | 1.32 |
| Optional Add-On Reduction Box: GB1P-205-125A | 200 (270) | 38 (28) | 1 1/4" Round 5/16" kW Mounts to SAE "BB" Output PTO |
0.49 |
Approximate Weight: 23 lbs. (10.4 Kg.)