Fits Ford 4R100 Transmission Raybestos GPZ Friction Module 1998-On CLUTCH PACK COMPONENTS Raybestos® Powertrain Ford 4R100 GPZ Clutch Pack® Module. RGPZ-4100 features 3 Overdrive GPZ Clutch 4R100, 3 Coast Graphitic, 3 Intermediate GPZ Clutch 4R100, 6 Low/Reverse High-Static Radial, 6 Direct GPZ Clutch, 5 Forward GPZ Clutch with a hardened forward clutch core to prevent tooth wear and tooth sharpening over time. Recommended Use: Heavy-duty vehicles, commercial vehicles, and high-stress driving enhanced performance applications Raybestos Powertrain GPZ 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 plates outstanding performance benefits are perfect for heavy duty vehicles and high-stress driving. Testing GPZ revolutionary friction material shows that it outperforms OE materials by as much as 20%. Plus, its performance improves as the power increases.