The SunCoast 618228 4-Ring Accumulator Piston is designed to improve transmission durability and sealing performance in Dodge 47RE and 48RE automatic transmissions. Unlike the factory piston that uses fewer sealing surfaces, this upgraded billet-style accumulator piston features a 4-ring design that provides improved hydraulic sealing and more consistent clutch apply pressure under demanding conditions.

Ideal for towing, racing, sled pulling, and high-horsepower Cummins applications, the SunCoast 4-Ring Accumulator Piston helps improve transmission reliability while supporting firmer and more consistent shifting performance.

Features

• Upgraded 4-ring accumulator piston design
• Improves hydraulic sealing compared to factory piston
• Helps maintain consistent clutch apply pressure
• Designed for 47RE and 48RE automatic transmissions
• Ideal for towing and performance applications
• Improves transmission durability and reliability
• Precision-machined construction
• Direct-fit replacement component

Why Upgrade the Accumulator Piston?

The factory accumulator piston can experience sealing issues under high line pressure and heavy load conditions. Poor sealing can lead to inconsistent shifts, clutch wear, and reduced transmission performance. The SunCoast 4-Ring design increases sealing capability to help improve shift consistency and transmission longevity.

Vehicle Fitment

• 1994-2007 Dodge Ram 2500 5.9L Cummins
• 1994-2007 Dodge Ram 3500 5.9L Cummins
• Fits trucks equipped with 47RE or 48RE automatic transmissions

Built for Demanding Diesel Applications

SunCoast transmission components are trusted throughout the diesel industry for their durability and performance. Whether your truck is built for towing, competition, or street use, the 618228 4-Ring Accumulator Piston provides improved sealing and reliability for your transmission build.

Part Number: 618228

Note: Professional installation is recommended when servicing internal transmission components.