No one knows transmissions & torque converters like

Sonnax

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
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New Parts

Ring Gear Anti-Wear Washer Kit Ring Gear Anti-Wear Washer Kit
28510-AW
Hp-logo

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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Pulley Bearing Kit Pulley Bearing Kit
33201N-01K

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

Pinion Washer Pinion Washer
46580A-W

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
Pinion Washer Pinion Washer
46580-W

Sonnax offers replacement pinion washer 46580-W for OD planetaries with 24-tooth sun gear in Ford 5R55N/W/S transmissions.

  • Thickness: 0.020"
  • Material: Bronze
Pinion Washer Pinion Washer
56582E-W

Sonnax offers replacement pinion washer 56582E-W for forward planetaries in listed Ford transmissions.

  • Thickness: 0.020"
  • Material: Bronze
Pinion Washer Pinion Washer
73583-W

Sonnax offers replacement pinion washer 73583-W for front planetaries in 4EAT, RE4R01A and RE5R01A transmissions.

Sonnax washer 73583-W fits .469" dia. (small) pinion pins only; Sonnax wa...

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  • Thickness: 0.020"
  • Material: Bronze
Pinion Washer Pinion Washer
73583-WB

Sonnax offers replacement pinion washer 73583-WB for front planetaries in 4EAT, RE4RO1A and RE5R01A transmissions.

Sonnax washer 73583-WB fits .481" dia. (large) pinion pins only; Sonnax ...

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  • Thickness: 0.020"
  • Material: Bronze
Pinion Washer Pinion Washer
89584-WL

Sonnax offers replacement pinion washer 89584-WL for rear planetaries in Aisin AW 55-50SN and 55-51SN transmissions.

Sonnax washer 89584-WL fits .477" dia. (large) pinion pins only; Sonna...

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  • Thickness: 0.027"
  • Material: Bronze
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