The Chelsea 281GMFJW-D5RK or 281GMFJWD5RK is a 281 Series hydraulically shifted hot-shift power take-off built for automatic transmissions with a 10-bolt aperture, including Allison applications. The 281 Series carries a continuous torque rating of 390 lb-ft and delivers nine speed ratios spanning low and high ranges. Key engineering advances over the earlier 280 Series include a ductile iron bearing cap rated 117% stronger than gray iron, an O-ring sealing configuration between housing and bearing cap for improved clamp load, and an 80% thicker steel clutch pack to resist premature tooth wear. Rotatable cast-iron flanges reduce interference fit issues, and the Wet Spline Lubrication option provides 7 to 10 times greater shaft life. Electronic Overspeed Control (EOC) and SmartStart are included features. Call us to confirm proper fit for your application.
Features
Hydraulic PowerShift (hot-shift) operation on 10-bolt automatic transmission aperture
Ductile iron bearing cap, 117% stronger than gray iron
O-ring sealing between housing and bearing cap improves clamp load and reduces vibrational effects
80% thicker steel clutch pack discs resist premature tooth wear
Nine speed ratios including low and high speeds; 390 lb-ft continuous torque rating
Electronic Overspeed Control (EOC) and SmartStart reduce shock load and protect driven equipment
Wet Spline Lubrication option for 7 to 10 times greater output shaft life
Tech Specs
- Mounting: 10-Bolt aperture (Allison automatic transmission)
- Shift Type: PowerShift (Hydraulic hot-shift)
- Continuous Torque: 390 lb-ft (529 Nm)
- Speed Ratios: Nine, including low and high speeds
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Lubrication: Pressure Lube (P) or Wet Spline (W) option
- Bearing Cap: Ductile iron, 117% stronger than gray iron
- Series: Chelsea 281 Series (evolution of the 280 Series)
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
