TH400/4L80E Aluminum Direct Drum & Extra Large Sprag
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Smart-Tech Input Housing Kit with Heavy Duty Input ShaftSmart-Tech input housing kit with heavy duty input shaft 77733-12K fits 300mm reluctor-style units. The high-strength shaft features many unique refinements available only from Sonnax, including a unique design that protects against failure from stress cracks. Both the housing and shaft also are available separately. Learn More
Do What You Cant...
A look into the lifestyle
These knuckleheads think diesels are stupid. What do y'all think?
4l80E Billet Overdrive PlanetIt is not uncommon to see the splines stripped out of the overdrive planet on 4L80E's. The becomes a more prominent in higher horsepower applications or vehicles with larger wheel's and tires. This new billet 4L80E overdrive planet eliminates this by manufacturing the turbine splines from 4140 heat treated stress relieved steel. Learn More
SunCoast carries quality-designed and manufactured transmission parts & some badass apparel to rep that SunCoast Life. Whether sled pulling, drag racing or hauling heavy loads, SunCoast has you covered.
Heavy Duty Input Shaft
Heavy Duty Output Shaft 4WD/AWD
Pinless Accumulator Piston Kit
Leading the diesel transmission industry in innovation. SunCoast takes great pride in providing their authorized dealers with the best products and most accurate tech support possible. This translates to a seamless experience for the customer from the manufacturer to the dealer.