SunCoast SC-10L1000-CAT3-R Category 3 10L1000 Transmission Rebuild Kit with Pro-Loc Valve Body Combo | 2020-2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax L5P

Features:

• 20% stronger than the OEM powertrain for extreme durability
• 4140 Steel Dowels replace the weak, factory cast aluminum
• Includes Pro-Loc Valve Body & Pump for increased line pressure for firmer, faster shifts
• 250% increase in cooler charge pressure
• Perfect for heavy-duty towing, hauling, and performance applications

Unleash the Full Potential of Your 10L1000 Transmission

If you're pushing your 2020-2025 GM 6.6L Duramax to its limits, whether for heavy towing, off-road adventures, or high-performance applications, the SunCoast Category 3 10L1000 Rebuild Kit is the ultimate upgrade. Factory transmissions are designed for stock performance, but when you demand more, the weaknesses of the 10L1000 start to show”slipping clutches, excessive heat, and inefficient fluid dynamics. This comprehensive rebuild kit not only restores but enhances your transmission's durability and performance. With premium Raybestos GPZ friction materials, expanded clutch capacity, and precision-machined billet components, this kit delivers stronger, smoother shifts and extended service life”ensuring your transmission keeps up with your power demands.

Pro-Loc Valve Body & Pump: Precision-Engineered for Power

The SunCoast Pro-Loc Valve Body and Pump Combo is a game-changer for 10L1000 performance. Factory valve bodies and pumps are engineered for comfort, but they struggle under heavy loads and high horsepower. SunCoast's Pro-Loc system dramatically increases line pressure by up to 60 PSI, improving clutch clamping force for stronger, faster shifts. The Torque Converter Clutch lock-up circuit is modified for quicker engagement, reducing slip and extending clutch life. The cooler charge pressure is boosted by 250%, providing better lubrication and reducing transmission temperatures during heavy towing or aggressive driving. SunCoast also refines the latch valve circuit, allowing full clutch pack engagement at 80 PSI instead of the stock 120 PSI, leading to faster, more efficient shifts. With these upgrades, your transmission is not only stronger and more responsive but also built to withstand high-performance environments without compromise.

Vehicle Fitment: 2020, 2021, 2022, 2023, 2024, 2025 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax L5P

Kit Includes:

• Raybestos Powertrain GPZ Frictions
• Raybestos Powertrain Steels
• SunCoast Pro-Loc Valve Body and Pump
• Expanded Capacity E Drum with Billet Apply Piston
• Expanded F Clutch Capacity
• 10L1000 Transmission Overhaul Kit
• Pan Filter

Notes:

• $1,500 Refundable Valve Body Core Charge applies