Ford 4R100 4WD Transmission Raybestos GPZ Deluxe Rebuild Kit 1998-UP Level 2 Has Raybestos GPZ Friction Plates, Steel Plates, 4WD Filter, Intermediate Band, Complete Bushing Kit, Sealing Rings, Metal +Clad Seals, Gaskets, Orings, Bonded Pistons, Rubber Piston Seals + Servo Piston, Low/Rev (Rear) Sprag, Intermediate Heavy Duty 45 Lugs, Overdrive Spiral Snap ring, Torrington Bearing kit, & Transgo Accumulator Kit!! This kit includes two upgrades and additional parts to improve the longevity of your rebuild. The spiral updated snap ring that holds the overdrive return spring. This kit also has your Transgo accumulator kit to replace your worn original equipment .372 diameter aluminum valve and bushing that can cause soft shifts with the improved steel .371 Line Boost valve & Bushing! This kit fixes the common wear areas in the E4OD/4R100! The original aluminum clutch line regulator valves shed the hard plating on the ends, scratch the bore stick. Resulting in burned clutches and missing shifts. Replace with 3 New Hard Steel Regulator Valves that fit all E4OD’s/4R100 and fix the problem! NOTE: This kit comes with a 4WD filter if you have a 2wd 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 Mfg by TRANSTEC.