No one knows transmissions & torque converters like

Sonnax

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

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Maybe it’s not the torque converter!

View Transmission Parts for Resolving & Preventing Torque Converter Problems

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Increase Your Torque Capacity with Sonnax Multi-Plate Converter Clutch Kits

To upgrade the torque converter, Sonnax offers heavy duty multi-plate converter clutch kits with all the components needed to build a complete piston/damper assembly tuned to your specifications.

  • Utilizes three high thermal, high-torque capacity friction elements
  • Improved oil flow across clutch plates
  • Improved spring end caps prevent over-compression
  • Reduced overall weight
  • Clear step-by-step instructions for easy installation
  • Increased strength cover
See All Sonnax Multi-Plate Converter Clutch Kits

Nobody knows torque converters like Sonnax.

Sonnax is the world's leading supplier of aftermarket torque converter components for domestic, import, industrial, racing and heavy-duty converters. Our extensive selection of parts combines the latest in automotive technology with outstanding reliability, performance and durability for long-lasting, trouble-free rebuilds.

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Sonnax Racekits

Sonnax 8" and 10" non-lockup racekits are popular with converter rebuilders supplementing their stock rebuild with performance units for drag, sand rail, rock climbing, swamp buggy and mud racing.

New for 2014 – Fully Machined Front Covers!

Sonnax racekits traditionally featured partially machined front covers, with much of the outer face remaining as forged. In response to many requests from rebuilders to offer fully machined covers, Sonnax is pleased to announce this upgrade is now complete for all the 8" and 10" racekits.

Sonnax also pressed bushings into place on all covers except that found in the FD-RK-1 so that rebuilders no longer need to spend time on this step.

Stay Ahead of the Pack with Sonnax Racekits

  • Fully machined cover with bushing installed
  • Unit-specific design for hassle-free installation
  • Oil flow grooves and holes increase fluid flow to keep converters running cooler
  • Turbine hub features a larger flanged diameter to increase strength and rigidity of the turbine.
  • Clear, detailed instructions

Keep up-to-date with the latest news from Sonnax by becoming a Sonnax Insider today!

See All Sonnax Racekits

All Upgraded Racekits

Application Part No.
Ford
10" Racekit AOD FD-RK-1
10" Racekit C4 10" & 11" FD-RK-3
10" Racekit C6 FD-RK-4
10" Racekit C4 11" FD-RK-9
GM
10" Racekit 4L60 GM-RK-9
27 Spline
GM-RK-10
30 Spline
10" Racekit Powerglide®, 350, 400 GM-RK-1
30 Spline
GM-RK-1S
Small Bolt Pattern
GM-RK-7
17 Spline
8" Racekit 350 & 400 GM-RK-2
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New Parts

Impeller Hub Impeller Hub
TO-90-22G

Sonnax flanged impeller hub TO-90-22G replaces worn or damaged hubs in the Aisin Seiki AS68RC converter.

  • Reinforced flange for superior weld characteristics
  • Machined pilot ...

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    • Assembled Height: 2.210"
    • Height: 2.570"
    • Journal Dia.: 1.843"
    • Pump Drive Style: Slots
    • Hub Mount: Flanged
    • Material: Steel
     
Impeller Hub Impeller Hub
HK-90-6G

Sonnax flanged impeller hub HK-90-6G replaces worn or damaged impeller hubs in Hyundai/Kia A6MF1 converters.

  • Reinforced flange provides superior weld characteristics
  • Precis...

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    • Assembled Height: 1.350"
    • Flange Outer Dia.: 4.130"
    • Journal Dia.: 1.693"
    • Pump Drive Style: Slots
    • Hub Mount: Flanged
     
Impeller Hub Impeller Hub
TO-90-21G

Sonnax flanged impeller hub TO-90-21G replaces worn or damaged impeller hubs in Toyota/Lexus U760E (TM-60LS) converters.

  • Reinforced flange for superior weld characteristics
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    • Journal Dia.: 1.695"
    • Assembled Height: 1.492"
    • Height: 1.700"
    • Flange Outer Dia.: 3.480"
    • Hub Mount: Flanged
    • Material: Steel
    • Pump Drive Style: Slots
     
Flanged Impeller Hub Flanged Impeller Hub
TO-90-20G

Sonnax flanged impeller hub TO-90-20G replaces worn or damaged hubs in Toyota/Lexus U151E and A541E converters.

  • Reinforced flange with pilot diameter ensures accurate alignment
  • ...

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    • Assembled Height: 1.733"
    • Height: 1.930"
    • Journal Dia.: 1.500"
    • Flange Outer Dia.: 3.290"
    • Hub Mount: Flanged
    • Pump Drive Style: Slots
    • Material: Steel
     
Impeller Hub Impeller Hub
TO-90-23G

Sonnax flanged impeller hub TO-90-23G replaces worn or damaged impeller hubs in Toyota A760E and A960E/F (TB-65SN) converters.

  • Reinforced flange provides superior weld characteristi...

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    • Journal Dia.: 1.499"
    • Assembled Height: 1.710"
    • Height: 1.900"
    • Flange Outer Dia.: 3.230"
    • Hub Mount: Flanged
    • Material: Steel
    • Pump Drive Style: Slots
     
Turbine Hub Turbine Hub
GM-HT-36HS

Sonnax turbine hub GM-HT-36HS replaces worn or damaged hubs in BorgWarner 310mm non-lockup special application Agramart-Perkins converters.

  • Forged from high-strength steel
  • ...

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    • Internal Spline Tooth Count: 23
    • Material: Steel
     
Sprag Sprag
BW-SP-5

Sonnax 22-element sprag BW-SP-5 is a direct replacement for worn or damaged sprags in Aisin AW TF-60SN (VW 09G) converters.

  • Sprag Element Count: 22
 
Turbine Hub Turbine Hub
AL-HT-4HS

Sonnax turbine hub AL-HT-4HS replaces worn or damaged hubs in Allison® 1000/2000/2400, 2006-later converters.

  • Forged from high-strength steel
  • Hardened internal splines ...

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    • External Spline Tooth Count: 45
    • Internal Spline Tooth Count: 25
    • Material: Steel
     
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