The Suncoast Cat-3 kit is a full transmission overhaul kit with expanded capacity frictions and steels.

HPR have added a new oil pump, Sonnax Bushing kit and HPR Billet E-hub for a complete solution. In addition HPR have upgraded the kit with custom machined heavy duty A and D backing plates from Sonnax to suit this specific kit.

You also have the option of getting a Sonnax Zip kit for the valve body and a new genuine Solenoid kit from ZF which we highly recommend for a performance build.

Please note that this kit requires professional installation, and may need oversize valves for the valve body.

The kit have a conservative power and torque rating of 1600HP/1600Nm

The kit contents:

Raybestos Powertrain GPZ Frictions
Raybestos Powertrain Steel Clutch Pack Module
Sonnax bushing kit
8HP70 Piston Kit
8HP70 Filter/Pan
Molded Valve Body Separator Plate
High Performance Overhaul Kit
HPR modified heavy duty backing plates
New oil pump
HPR Billet 7075 E-hub (only for 38 spline)
Optional Sonnax Zip kit
Optional Genuine ZF solenoid kit (only gen 1)

This new SunCoast 8HP70 rebuild kit is manufactured using Raybestos Powertrain GPZ frictions. Raybestos Powertrain GPZ friction plates greatly increase transmission performance and durability. This state-of-the-art friction material far exceeds OE material to withstand high stress, high temperatures and repeated cycling. GPZ's outstanding performance benefits are perfect for heavy-duty vehicles and high-stress driving. Testing of GPZ revolutionary friction material shows that it outperforms OE materials by as much as 20%. Plus, its performance improves as the power increases.

This SunCoast 8HP70 kit also comes with Raybestos Powertrains's Steel Clutch Pack Module. Raybestos Powertrain steel clutch plates are high-quality, application-engineered products at a price you can afford. Manufactured with attention to critical tolerances and quality control, our steel plates meet or exceed OE specifications and have a superior surface finish that supplies a greater apply area and friction clutch life. Raybestos steel plates give better shift performance and clutch durability, lowering noise and shudder and extending the life of your transmission.

Additionally, this new SunCoast 8HP70 rebuild kit includes an 8HP70 piston kit, 8HP70 filter/pan, molded valve body separator plate, and a high-performance overhaul kit.

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