Ford 4R100 4WD Transmission Master Raybestos GPZ Rebuild Kit 1998-UP Level 2 This rebuild kit includes all of the Raybestos GPZ Friction Clutches, Steel Clutches, Sealing Rings, Metal Clad Seals, Gaskets, Orings, Bonded Pistons, Rubber Piston Seals + 4wd Filter, Band, Pump Bushing, & Ext. Hsg Bushing. This Transmission Kit is one we sell everyday to Transmission Shops, it fits the 4R100 1998-On Note: This kit comes with the 4wd filter if you need the 2wd filter please see our other listing About: 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. Advantages: · Withstands high horsepower · Greater torque capacity · Maintains piston travel · Optimum performance · Higher heat resistance · Smooth engagements · Enhanced shift feel All these Kits have Clutches Manufactured by Raybestos and Gasket Sets made by TRANSTEC.