Heavy Duty & High Performance Upgrades

Sonnax high performance transmission products meet the toughest challenges faced by hard-working, daily-use transmissions as well as racing units going all-out on the street or track. Products range from innovative upgrades designed to fix everyday problems rebuilders see in their shops to an extensive line of Powerglide components.

HD Work/Sport Catalog

Take your heavy-duty gas & diesel builds to the next level with components for transmission, converter & driveshaft.

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Build the
killer 4L60-E
with Sonnax

Whether you’re starting from scratch with a heavy duty/performance build or optimizing a seasoned racing vehicle, key transmission areas MUST be addressed to realize the full potential of these units.

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Ray Lichtenberg's Hated Syclone

Ray Lichtenberg's "Hated" Syclone

  • Level 3 Sonnax 4L60/E Build
  • 900 HP
  • 1,000 ft-lbs
  • AWD

Sonnax Smart-Tech®

Regardless of the transmission, Sonnax Smart-Tech products are the best of the best. Through a fusion of top-notch expertise, innovative engineering, technical mastery and precision manufacturing, these groundbreaking parts overcome OE limitations to deliver the ultimate in transmission performance.

Learn more about Sonnax Smart-Tech

Sonnax Performance Goes Beyond the Transmission

Browse our ever-expanding line of race kits, slip yokes and driveshaft components.

All HP Parts