The Chelsea 281 Series Power Take-Off, part number 281GCFJP-B3RZ or 281GCFJPB3RZ, is a hydraulically shifted hot-shift PTO engineered for automatic transmissions with a 10-bolt aperture, including Allison transmissions. Built as a direct evolution of the 280 Series, the 281 Series carries a single continuous duty torque rating of 390 lb-ft and delivers nine speed ratios spanning both low and high ranges. 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 the vibrational effects of modern engine designs. The clutch pack uses steel discs that are 80% thicker than the previous generation to resist premature wear. Output options include SAE B and SAE C pump flanges, ISO 7652 pump flange, and driveline configurations. Rotatable cast-iron flanges reduce interference clearance issues, and the Wet Spline Lubrication option extends shaft life by 7 to 10 times. SmartStart reduces shock load at engagement, and Electronic Overspeed Control (EOC) protects driven equipment. A genuine Chelsea part available from Pro Gear and Transmission. Call us to confirm proper fit for your application.
Features
Hydraulic hot-shift (PowerShift) operation for use on Allison 10-bolt aperture automatic transmissions
Ductile iron bearing cap rated 117% stronger than gray iron
O-ring sealing configuration between housing and bearing cap for improved clamp load and vibration resistance
Enhanced clutch pack with steel discs 80% thicker than prior generation
Nine speed ratios including low and high speeds; output options include SAE B, SAE C, ISO 7652 pump flanges, and driveline
SmartStart shock-load reduction at engagement; Electronic Overspeed Control (EOC) protects driven equipment
Tech Specs
- Shift Type: Hydraulic (PowerShift / Hot Shift)
- Mounting: 10-Bolt aperture
- Compatible Transmission: Allison automatic transmissions
- Continuous Torque Rating: 390 lb-ft (529 Nm)
- Speed Ratios: Nine ratios including low and high speeds
- Output Types: SAE B pump flange, SAE C pump flange, ISO 7652 pump flange, driveline
- Lubrication: Pressure lube or Wet Spline option
- 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.
