281GDFJP-K5XD Chelsea PTO Assembly

The Chelsea 281 Series Power Take-Off, part number 281GDFJP-K5XD or 281GDFJPK5XD, is a hydraulically shifted hot-shift PTO engineered for automatic transmissions with a 10-bolt aperture, including Allison transmissions. It carries a single, continuous duty torque rating and is available with SAE B, SAE C, or ISO 7652 pump flange outputs, plus driveline output options. The 281 Series is an evolution of the 280 Series, featuring 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 clutch pack steel disk design to resist premature tooth wear. Cross-referenced as 5P1491 and 5P1479. Call us to confirm proper fit for your specific transmission and application.

Features

Hydraulic PowerShift (hot-shift) operation for 10-bolt automatic transmission apertures, including Allison
Ductile iron bearing cap, 117% stronger than gray iron compared to the predecessor 280 Series
O-ring sealing configuration between housing and bearing cap to reduce vibrational effects and improve clamp load
Enhanced clutch pack with 80% thicker steel discs to resist premature tooth wear
Nine speed ratios available, spanning low and high speed ranges
Wet Spline Lubrication option extends shaft life by 7 to 10 times; SmartStart reduces shock load at engagement; Electronic Overspeed Control (EOC) protects driven equipment

Tech Specs

• Mounting Type: 10-Bolt aperture (Allison automatic transmissions)
• Shift Type: PowerShift - Hydraulic hot-shift
• Continuous Operation: Yes
• Output Types: SAE B Pump Flange, SAE C Pump Flange, ISO 7652 Pump Flange, Driveline
• Speed Ratios: Nine ratios including low and high speeds
• Lubrication Options: Pressure Lube (P), Wet Spline (W)
• Cross-References: 5P1491, 5P1479

Additional Information

Parts Manual: Chelsea 281 Series PTO Parts Manual (PDF) — exploded views, item numbers and the full parts breakdown for this series.