Features
Hydraulic hot-shift (PowerShift) operation for use on automatic transmissions with a 10-bolt aperture, including Allison
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring sealing configuration between housing and bearing cap improves clamp load and reduces vibrational effects
Enhanced clutch pack with steel discs 80% thicker than the prior 280 Series design
Nine speed ratios including low and high speeds; continuous torque rating of 390 lb-ft
Electronic Overspeed Control (EOC) and optional SmartStart to reduce shock load at start-up; Wet Spline Lubrication option provides 7 to 10 times greater shaft life
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic)
- Transmission Application: Allison automatic transmissions
- Continuous Torque: 390 lb-ft (529 Nm)
- Speed Ratios: Nine, including low and high
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Lubrication Options: Pressure Lube, Wet Spline
- Series: Chelsea 281 Series (evolution of 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.
