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Circle D 258mm Pro Series 4R70 Torque Converter

4R70 Converter available in 2800-3700 stall speed
Pricing: $1,099.00

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Circle D 258mm Pro Series 4R70 Torque Converter

  • Excellent option for turbo or PD blower cars
  • 258mm Pro Series
  • Comes standard with single disk lock up, but can be upgraded to triple disk
  • Can be upgraded to a mechanical diode sprag, or spragless
  • Stall speed can be in 200 RPM windows from 2800-3700
  • Anti-balloon plate on pump and turbine
  • Billet front cover and billet piston
  • Furnace brazed
  • Flanged impeller hub for anti-flex durability
  • Tig welded design
  • Can be used in 4R70 and 4R75 applications


If you need help with the stall speed selection, you can call and ask us or Circle D directly. Be ready to provide information such as, but not limited to:

  • How much HP is the car making?
  • What power adder is being used?
  • Is the car raced, street driven, or both?
  • Approximate weight of vehicle.
  • Camshaft RPM power range.


  • CD-30-12-05
  • CD-30-12-05
  • Circle D
  • New


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