October 31st 2025

SunCoast Performance to Showcase Next-Generation 10-Speed Transmission Platforms at SEMA & PRI 2025

SunCoast Performance is set to make a major impact at SEMA and PRI 2025, unveiling its latest advancements for Ford and GM’s 10-speed transmission platforms. These newly engineered systems — including the SunCoast 10R140 Pro Loc Valve Body and Pump Assembly and the SunCoast 10L1000 High-Capacity “E” Clutch Drum — represent the culmination of years of research, testing, and real-world data gathered from our in-house Hydra-Test dyno.

These developments continue SunCoast’s commitment to improving performance, reliability, and drivability across today’s most advanced transmission platforms.

The 10R140 Platform – Engineered for Power and Precision

Originally co-developed by Ford and General Motors, the 10R140 10-speed automatic transmission was designed to optimize both fuel economy and performance for high-output powertrains. Featuring a 7.39 gear ratio spread and a low 4.70 first gear, the 10R140 offers rapid acceleration and seamless shift recovery — maintaining ideal RPM for towing, hauling, and performance use.

While the 10R140 is a sophisticated design, real-world demands have revealed common issues such as pressure loss, erratic clutch engagement, and heat-related wear. SunCoast’s updated Pro Loc Valve Body and Pump Assembly directly addresses these weaknesses with several key enhancements:

Increased line pressure by up to 60 PSI for greater clutch clamping force
250% improvement in lube circuit pressure, reducing frictional heat and wear
33% faster clutch engagement for quicker, smoother shifts
Enhanced torque converter clutch (TCC) control, minimizing slip and degradation

Each 10R140 unit is built with Raybestos GPZ friction material, proven to withstand extreme stress, heat, and load — increasing torque capacity and longevity by over 20% compared to OE components. The design also improves the durability of the problematic “E” and “F” clutch assemblies, increasing clutch count and heat dissipation capacity.

The 10L1000 Platform – Strength for the Next Generation

SunCoast’s 10L1000 High-Capacity “E” Clutch Drum and Pro Loc Valve Body represent the next evolution in transmission performance for GM’s 10-speed platform. Designed and manufactured in-house from billet 6061 aluminum, this patent-pending assembly eliminates deflection and increases clutch surface area for greater holding power and precision.

Key advancements include:

29% greater clutch capacity than OEM (15% more than any aftermarket design)
Billet apply piston with enlarged diameter for even pressure distribution
Raybestos GPZ clutches for superior friction stability under load
4140 steel dowel engagement system, replacing weaker cast aluminum for durability

The SunCoast 10L1000 Pro Loc Valve Body complements the clutch assembly by optimizing hydraulic control. Lock-up apply time has been reduced significantly, line pressure has been increased up to 60 PSI, and lube pressure has been elevated from 6 PSI to 20 PSI — a 250% improvement for better cooling and lubrication under demanding conditions.

These upgrades result in shorter shift times, higher clutch life, and more efficient torque transfer — essential for both heavy-duty towing and high-performance builds.

Hydra-Test Dyno Validation – Proven, Not Theorized

Every SunCoast 10-speed product is rigorously validated on our Hydra-Test transmission dyno, where we simulate real-world load, temperature, and pressure conditions to verify each unit’s performance before it reaches the customer. This level of testing ensures precise hydraulic calibration, stable converter feed, and consistent charge pressure — delivering the kind of smooth yet firm shift feel that defines SunCoast Performance.

Experience It at SEMA and PRI

SunCoast invites attendees at SEMA and PRI 2025 to visit our booth and experience firsthand the engineering that keeps the 10R140 and 10L1000 alive under the most demanding conditions. From advanced clutch systems to precision-calibrated valve bodies, every component reflects SunCoast’s commitment to innovation, durability, and proven real-world performance.

Learn more at suncoastdiesel.com.