All Sonnax Parts

Sonnax designs, develops and manufactures the highest quality aftermarket automotive products. We are the world’s largest full-line supplier of torque converter parts, and offer transmission and specialty driveline components through a global network of parts distributors.

Transmission

Contact a Sonnax Parts Distributor.


Torque Converter, Power Train Savers®, Ring Gears & Harley-Davidson® Replacement Bearings

  • Existing Customers: Contact your sales representative.
  • New Customers: Fill out the form and a sales representative will contact you.

Aluminum Driveshaft Components

Contact your local driveline shop for availability. If you need assistance finding a shop, or if you would like to become a distributor, fill out the form and a Sonnax driveline product specialist will contact you.


Slip Yokes

Contact your Sonnax Performance Slip Yokes Distributor or your local driveline shop for availability. If you need assistance finding a shop, fill out the form and a Sonnax driveline product specialist will contact you.

Transmission Parts Torque Converter Parts High Performance & Heavy-Duty Parts Remanufactured Valve Bodies Driveline Parts Power Train Savers® Harley-Davidson® Bearings & Rollers Ring Gears
5R55S, 5R55W Pressure Regulator Valve 56947J-77

5R55S • 5R55W

Pressure Regulator Valve 56947J-77

    Helps cure:
  • Delayed engagement
  • Soft shifts & poor line rise
  • Erratic buzz
  • Harsh shifts
  • Pressure control out-of-range codes
  • High line pressure in Reverse
  • Erratic line pressure
  • Burnt clutches
5R55S, 5R55W Boost Valve Kit 56947J-74K

5R55S • 5R55W

Boost Valve Kit 56947J-74K

    Helps cure:
  • No Reverse
  • Reverse slip
  • Low Reverse boost
  • Delayed engagement
  • Soft shifts
  • Poor shift quality
  • Low line rise
  • Erratic line pressure
  • Burnt clutches
  • Poor fuel economy
↑