Category 3 550HP 4R100 Transmission with Converter

• Torque converter maximizes power transfer, improves efficiency, and eliminates slip.
• Extends transmission lifespan by reducing internal wear
• Eliminates soft shifts, converter shudder, and common 4R100 failures
• Strengthens the drivetrain to handle high torque applications
• Rated to handle up to 550HP

Unrivaled Power & Durability for Your 7.3L Powerstroke

If you’re pushing your 1998-2003 Ford 7.3L Powerstroke beyond stock power levels, your transmission needs to be up to the challenge. The SunCoast Category 3 550HP 4R100 Transmission is engineered to handle high horsepower, heavy towing, and aggressive driving without failure. Stock 4R100 transmissions struggle under increased power and load, leading to premature wear, slipping, and costly breakdowns. SunCoast eliminates these weak points with precision-engineered billet components, improved clutch materials, and a fortified hydraulic system. Whether you’re towing heavy loads, running high-performance tuning, or just demanding more from your truck, this transmission delivers crisp shifts, unmatched reliability, and optimized power transfer for an unbeatable driving experience.

Precision Engineering & Superior Build Quality

SunCoast doesn’t just rebuild the 4R100 transmission—they redefine it. This transmission features Alto Red Eagle clutches with Kolene steels, reducing slippage and providing superior heat resistance for extended clutch life and better holding capacity. A heavy-duty 45-element intermediate sprag replaces the weak factory design, increasing durability by up to 53%. The TransGo HD2 Tugger Kit enhances shift quality, eliminates common failure points, and improves fluid delivery for better cooling and lubrication. To further ensure longevity, this build includes a billet forward clutch drum, a 300 Maraging billet input shaft, and a completely new solenoid pack for precise electronic control. Every SunCoast 4R100 transmission is meticulously designed for seamless installation and peak performance under extreme conditions.

Billet Triple-Disc Torque Converter for Maximum Power Transfer

A transmission is only as good as its torque converter, and SunCoast doesn’t cut corners. This billet triple-disc torque converter provides stronger lockup, reduced slip, and more efficient power transfer compared to the stock unit. Engineered with carbon-graphitic clutch materials and a precision-machined billet apply piston, this converter eliminates deflection under heavy loads, preventing overheating and premature failure. The increased clutch surface area ensures smoother engagement, better fuel efficiency, and improved throttle response, making it a must-have for towing and high-performance applications. With enhanced durability and refined lockup, this torque converter is built to handle everything from daily driving to extreme workloads without compromise.

• $1,450 core charge applies.