4R100, 4R100, 6-Stud, Multi-Plate Performance Converter

Performance Converter Kit
Part No. FD-RK-22

View Instructions

Sonnax performance converter kit FD-RK-22 is a heavy-duty, dampered multi-plate kit that improves holding capacity in the Ford 4R100, 6-stud converter without sacrificing stock shift action. Clear instructions, minimal setup and easy assembly make these foolproof upgrades. All-new kit components eliminate the rework and limitations associated with salvaged parts.

  • Fully-machined, forged piston and custom damper rivets won’t bend under extreme lockup pressure
  • Piston is tested and proven to withstand bending up to 400 psi
  • Spring end caps limit how far springs compress under load to prevent breakage
  • Increased oil flow improves cooling and lubrication of clutch plates
  • Patented piston/damper assembly absorbs up to 1,250 ft-lb of torque, nearly twice the stock capacity of the Ford 4R100 damper
  • Three solid, non-segmented, high-thermal, high-torque capacity friction elements deliver solid holding power
  • Front Cover 6-Stud
  • Clutch Plate with Internal Splines
  • Clutch Plate with External Splines
  • Damper Assembly
  • Thrust Bearing
  • Seal PTFE
  • Energizer Ring
  • Rivets (10)
  • Turbine Hub
  • Transmission Unit: 4R100
  • Core: Ford 4R100, 6-Stud
  • Dampered: Yes
  • Lockup: Multi-Plate
  • Unit Size: 12.5"
  • Clutch Material: HTE
  • Turbine Hub Input Spline Count: 31

Where to Buy

  • Existing Customers: Contact your sales representative.
  • New Customers: Fill out the form and a sales representative will contact you.
  • 4R100, 4R100, 6-Stud, Multi-Plate Performance Converter Performance Converter Kit FD-RK-22

Sonnax Performance Converter Kits

Engineered to Deliver Builds that Last

Designed from the ground up to outperform OE and other aftermarket components, Sonnax has you covered with a full line of performance converter kits for gas and diesel vehicles. Offering the widest variety of options in the aftermarket, these innovative kits deliver customized performance and value.

  • Small/Large Diameter
  • Single-Plate/Multi-Plate/Non-Lockup
  • Dampered/Damperless


Choose the right kit for your rebuild!