The Chelsea 281 Series Power Take-Off Assembly, part number 281GTFJP-B8RF or 281GTFJPB8RF, is a hydraulically shifted hot-shift PTO designed for automatic transmissions with a 10-bolt aperture, commonly found on Allison transmissions. It carries a continuous torque rating of 390 lb-ft and covers nine speed ratios, including low and high speeds. The ductile iron bearing cap is 117% stronger than gray iron, and an O-ring sealing configuration between the housing and bearing cap improves clamp load while reducing vibrational effects. The clutch pack features steel disks that are 80% thicker than the predecessor 280 Series design. Wet Spline Lubrication option extends shaft life by 7 to 10 times. Electronic Overspeed Control (EOC) protects driven equipment, and SmartStart reduces shock load at start-up for compatible applications. Rotatable cast-iron flanges reduce pump clearance interference, and the driveline positive-stop output eliminates oil seal damage from coupling. Call us to confirm proper fit for your application.
Features
Ductile Iron Bearing Cap - 117% stronger than gray iron for increased durability
O-Ring Sealing Configuration - improves clamp load and reduces vibrational effects between housing and bearing cap
Enhanced Clutch Pack - steel disks are 80% thicker than the 280 Series predecessor to resist premature tooth wear
Nine Speed Ratios - includes both low and high speed selections
Wet Spline Lubrication Option - extends shaft life by 7 to 10 times compared to standard lubrication
Electronic Overspeed Control (EOC) - protects driven equipment; SmartStart reduces shock load at start-up for compatible applications
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: PowerShift (Hydraulic)
- Compatible Transmissions: Allison (10-bolt aperture)
- Continuous Torque Rating: 390 lb-ft (529 Nm)
- Speed Ratios: Nine, including low and high speeds
- Continuous Operation: Yes
- Output Types Available: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Lubrication: Pressure Lube or Wet Spline option
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
