SunCoast 10L1000-6X-3D Allison 10L1000 10 Speed Triple Disc Billet Torque Converter (Stock Stall) | 2020-2025 GM 2500HD/3500HD 6.6L Duramax L5P

Features:

• Fits 2020–2025 GM 2500HD and 3500HD Duramax
• Designed for Allison 10L1000 10-speed transmissions
• Triple disc billet design for maximum durability
• Reduces turbine slip under heavy load
• Improves towing efficiency and heat control
• CNC machined billet stator and piston assembly
• 4140 steel turbine and impeller hubs
• Furnace brazed fins for increased strength
• Enhanced clutch material for faster lockup
• New billet cover resists deflection under pressure
• Hand assembled in the USA
• Backed by 3-year unlimited mileage warranty
  

Build Your Duramax Into A Tow Ready Powerhouse

If you’re pushing your L5P harder than the factory ever expected, the SunCoast 10L1000 Triple Disc Billet Torque Converter is one of the smartest upgrades you can make. It transforms the way your truck handles heavy loads by cutting down turbine slip and delivering a stronger, more consistent lockup feel. This means smoother towing, cooler temperatures, and far less strain on the rest of your transmission. You’ll feel the difference the first time you put your foot into it with a trailer behind you, because the converter grabs sooner and holds stronger without the mushy hesitation the stock unit can develop. SunCoast builds this converter with a full billet stator, billet piston, and billet cover, so you’re getting the strength your truck needs for real work. It’s designed to stand up to aggressive driving, added power, and long hauls without giving up reliability. If you want a torque converter that feels tighter, pulls harder, and lasts longer than stock, this one is built for that exact purpose.

Precision Built Converter Engineering For Serious Power Levels

The SunCoast 10L1000-6X-3D Converter is engineered specifically for 2020–2025 GM 2500HD and 3500HD trucks equipped with the Allison 10L1000 transmission. This unit addresses the weak points commonly found when these trucks are pushed above factory power levels by reducing turbine slip through a CNC machined billet stator that improves efficiency and heat control. The triple disc clutch setup features upgraded friction material with increased surface area, allowing the converter to engage more effectively under load while reducing lockup times. SunCoast also upgrades the impeller and turbine hubs to CNC machined 4140 steel to eliminate deflection and improve long term strength. A billet apply piston and billet cover work together to add clamping force and maintain consistent apply pressure, even under demanding conditions. The fin assembly is furnace brazed for added rigidity, ensuring the converter holds up during long towing cycles and hard accelerations. Each unit is hand assembled and tested in Florida, backed by a 3 year unlimited mileage warranty for confidence in real world use.

Fitment: 2020-2025 GM 2500HD/3500HD 6.6L Duramax L5P

Notes:

• Designed for 2020–2025 GM 2500HD and 3500HD with 6.6L Duramax L5P
• Built specifically for the Allison 10L1000 10-speed transmission
• Intended for use in high power and heavy towing applications
• Refundable core charge of $2,000.00 applies
• Core must be returned in acceptable condition to receive refund
• Helps address turbine slip and clutch failure at higher output
• Not recommended for vehicles running a stock transmission tune under factory load levels
• Pairing with transmission tuning is recommended for optimal performance
• Hand assembled and quality inspected in Ft. Walton Beach, Florida
• Includes 3-year unlimited mileage warranty from SunCoast
• Professional installation is strongly recommended

Application Notes:

• Core charge of $2,000 applies.