1,700-1,800 RPM Stall Triple Disk

Features:

• Fits 2001–2016 6.6L Duramax with Allison 1000
• 1,700–1,800 RPM stall for improved drivability
• Triple disc lockup for firm, consistent engagement
• Forged billet steel cover for extreme durability
• Billet stator resists brake stall damage
• Ideal for towing, daily driving, or light performance
• Improves torque multiplication and throttle response
• In-house design and manufacturing by SunCoast
• Maintains cooler temps under load and towing
• Recommended for stock or mild turbo upgrades
• Delivers smooth power transfer and lockup control

Smooth Reliable Power Right When You Need It

If your Duramax is your daily driver, tow rig, or weekend warrior, the SunCoast GM-1057-3D Torque Converter is built to give you smoother power delivery and stronger lockup exactly where you need it. With a stall speed of 1,700 to 1,800 RPM, it delivers the perfect balance between low-end drivability and performance, especially for trucks with stock or mildly upgraded turbos. Whether you're pulling heavy loads or merging onto the highway with a trailer in tow, this converter keeps your powerband tight and your transmission locked in. The triple disc clutch ensures firm engagement and minimal slip, giving you confidence under throttle without sacrificing comfort on the street. It's also a smart move if you’re planning to upgrade later and want a converter that’s ready for more. Like all SunCoast torque converters, it’s designed and built in-house to exacting standards, so you know you're getting proven quality with every unit. If you want to improve drivability without jumping into full race-spec parts, this is the upgrade that makes sense.

Built For Torque Control And Long Haul Strength

The SunCoast GM-1057-3D Triple Disc Torque Converter is engineered for 2001–2016 GM 2500HD and 3500HD trucks equipped with the Allison 1000 transmission, offering a durable and balanced solution for towing and street performance. It features a 1,700–1,800 RPM stall speed, which is ideal for maintaining turbo efficiency while preserving low-speed control and towing capability. Internally, it’s built around a triple disc lockup clutch system for improved holding power and reduced slip, making it highly efficient under throttle. A forged billet steel cover adds structural strength, while the billet stator resists internal damage during high-load conditions like extended brake stalling. These details make it a solid match for drivers who need dependable lockup and performance without jumping to a high-stall race converter. This unit is especially useful for builds with minor tuning, towing packages, or mild turbo upgrades. Manufactured entirely in-house by SunCoast, this converter ensures consistent performance, tighter lockup control, and increased drivetrain reliability for long-term use.

 Fitment: 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

Notes:

• Fits 2001–2016 GM 2500HD/3500HD 6.6L Duramax trucks
• Designed for use with Allison 1000 transmissions
• Stall speed is set between 1,700 and 1,800 RPM
• Ideal for stock or mildly upgraded turbo setups
• Recommended for towing, daily driving, and light performance
• Triple disc lockup improves holding power and efficiency
• Billet stator resists damage from extended brake stalling
• Forged billet steel cover adds structural durability
• Built in-house by SunCoast for quality and consistency
• Not intended for high-stall race applications