The Chelsea 281 Series Power Take-Off Assembly, part number 281GDFJP-B3BD or 281GDFJPB3BD, is a hydraulically shifted hot-shift PTO built for automatic transmissions with a 10-bolt aperture, commonly used with Allison transmissions. This part is an evolution of the 280 Series and carries a cross-reference to 280GDFJP-B3BD or 280GDFJPB3BD. The 281 Series features a ductile iron bearing cap rated 117% stronger than gray iron, an o-ring sealing configuration between the housing and bearing cap to improve clamp load, and 80% thicker steel discs in the clutch pack to resist premature tooth wear. Nine speed ratios cover both low and high speed ranges, and the series supports continuous operation. Call us to confirm proper fit for your transmission and application.
Features
Hydraulic PowerShift (hot shift) operation for Allison 10-bolt automatic transmissions
Ductile iron bearing cap, 117% stronger than gray iron predecessor
O-ring sealing between housing and bearing cap improves clamp load and resists vibration
80% thicker steel discs in clutch pack to resist premature tooth wear
Nine speed ratios including low and high speeds; rated for continuous duty operation
Wet Spline Lubrication option provides 7 to 10 times greater shaft life; SmartStart reduces shock load at start-up; Electronic Overspeed Control (EOC) protects driven equipment
Tech Specs
- Mounting Type: 10-Bolt
- Shift Type: Hydraulic PowerShift (hot shift)
- Compatible Transmission Manufacturer: Allison
- Continuous Operation: Yes
- Speed Ratios: Nine (including low and high speeds)
- Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
- Lubricant Options: Pressure Lube (P) or Wet Spline (W)
- Cross Reference: 280GDFJP-B3BD or 280GDFJPB3BD
Additional Information
Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.
