No one knows transmissions & torque converters like


No one knows transmissions & torque converters like 2008-sonnax-logo-white

Ts robothead 18in high trans rgb
Maybe it’s not the torque converter!

View Transmission Parts for Resolving & Preventing Torque Converter Problems

Nobody knows transmissions like Sonnax.

Sonnax transmission products are the number one choice of large transmission remanufacturers, quality valve body rebuilders, and veteran independent specialists around the world. Our innovative parts are designed to address the root cause of automatic transmission problems, allowing rebuilders to salvage valve bodies with highly effective repairs.

Which Sonnax Kit is Right for Your Rebuild?

Line Pressure Booster Kit Line Pressure Booster Kits

Affordable kit for big performance without a big price tag.

  • Affordable kit with no special tools or reaming required
  • Slightly stronger springs for a modest base line pressure increase
  • Larger boost valves for demand-based line rise without low-speed harshness
3d zip kit-box_2010-right-trans Zip Kits®

The first step in correcting common shift problems.

  • Installs quickly & easily without any special tools
  • Stops leaks so the valve body works the way it's supposed to
  • In-depth tech booklet for installation, plus diagnostics & repair
Line Pressure Booster Kit The Sure Cure®

Comprehensive kit for big problems you don't want back.

  • Restores OE shift quality
  • Repairs biggest trouble areas to reduce comebacks
  • Step-by-step instructions for comprehenseive valve/pump body restoration
Performance pack box 3-d right flat trans Performance Packs

The best parts for performance & heavy duty recalibration

  • Firmer shifts under load without low-speed harshness
  • Consistent recalibration results with tuning options
  • Improved durability
  • No special tools required

New Parts

Tool Kit Tool Kit

Tool Kit for 102741-03K.

Oversized TCC Control & Plunger Valve Kit Oversized TCC Control & Plunger Valve Kit

Common concerns associated with listed Hyundai/Kia transmissions are high TCC slip, TCC lining degradation, TCC slip codes and converter apply or release concerns. These issues are often caused ...

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Pump Rotor Pump Rotor

Sonnax offers direct OE replacement pump rotor 104532 for GM 6L45, 6L50, 6L80 and 6L90 transmissions.

  • Thickness: .7066–.7071"

4-5-6 Clutch Apply Piston Kit 4-5-6 Clutch Apply Piston Kit

GM 6L80 and 6L90 transmissions often suffer failure of the 4-5-6 clutch assembly due to OE design shortcomings. Insufficient clutch piston-to-plate apply surface area causes clutch plate failure...

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Ring Gear Anti-Wear Washer Kit Ring Gear Anti-Wear Washer Kit

Contact between the aluminum Powerglide ring gear and the Reverse clutch pack pressure plate causes damage to both components and generates metal debris that circulates throughout the transmissi...

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Zip Kit® Zip Kit®

Sonnax Zip Kit U760E-ZIP targets the root cause of multiple concerns by sealing the critical circuit pressure losses in Toyota/Lexus U760E and U760F valve bodies. The kit contains uniquely-desig...

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Pulley Bearing Kit Pulley Bearing Kit

Sonnax pulley bearing kit 33201N-01K is a direct replacement for OE bearings in Jatco JF011E (RE0F10A) CVT units.

Pinion Washer Pinion Washer

Sonnax offers replacement pinion washer 46580A-W for OD planetaries with 38-tooth sun gear in Ford 5R55W/S/N transmissions.

  • Thickness: 0.020"
  • Material: Bronze
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