Sonnax Performance Transmission Parts

Sonnax
  • Sonnax® - High Performance Super Hold Automatic Transmission Servo Kit
    Sonnax®High Performance Super Hold Automatic Transmission Servo Kit
    1
    # sp192246
    High Performance Super Hold Automatic Transmission Servo Kit by Sonnax®. In high performance applications where a larger servo is desired, the Sonnax Super Hold servo kit provides the largest apply area of any available OE servo. The...
    Largest apply area of any OE servoOptional cushion springs allow maximum holding power while reducing excessive harshness
    $80.89 - $225.11
  • Sonnax® - High Performance Reinforced Automatic Transmission Clutch Piston
    Sonnax®High Performance Reinforced Automatic Transmission Clutch Piston
    0
    # sp192240
    High Performance Reinforced Automatic Transmission Clutch Piston by Sonnax®. Enhance drivetrain strength, performance, and durability and keep your transmission performing at its best with the industry’s best automotive components...
    Designed to improve your vehicle’s performance for more enjoyable ridesManufactured from premium materials to offer a long-lasting service life
    $43.22
  • Sonnax® - High Performance Smart Shell Heavy Duty Automatic Transmission Reaction Shell Kit
    Sonnax®High Performance Smart Shell Heavy Duty Automatic Transmission Reaction Shell Kit
    0
    # sp192242
    High Performance Smart Shell Heavy Duty Automatic Transmission Reaction Shell Kit by Sonnax®. From daily jobs to extreme builds, the Sonnax SmartShell heavy-duty reaction shell kit 77749-02K is the only way to prevent shell failure AND...
    Stops spline strippingPrevents hub breakage
    $120.72
  • Sonnax® - High Performance Smart Tech Automatic Transmission Clutch Drum Kit
    Sonnax®High Performance Smart Tech Automatic Transmission Clutch Drum Kit
    0
    # sp192243
    High Performance Smart Tech Automatic Transmission Clutch Drum Kit by Sonnax®. Enhance drivetrain strength, performance, and durability and keep your transmission performing at its best with the industry’s best automotive components...
    Designed to improve your vehicle’s performance for more enjoyable ridesManufactured from premium materials to offer a long-lasting service life
    $264.30 - $1,236.84
  • Sonnax® - High Performance Smart Tech Heavy Duty Automatic Transmission Input Shaft
    Sonnax®High Performance Smart Tech Heavy Duty Automatic Transmission Input Shaft
    0
    # sp192245
    High Performance Smart Tech Heavy Duty Automatic Transmission Input Shaft by Sonnax®. Input shaft failure is a common problem in OE units as power levels are increased. The Sonnax heavy duty input shaft non-reluctor style units is ideal...
    High-strength steel ideal for high performance applicationsShot peened and cryogenically treated for extreme durability
    $390.29 - $424.04
  • Sonnax® - High Performance Automatic Transmission Output Shaft Support Kit
    Sonnax®High Performance Automatic Transmission Output Shaft Support Kit
    0
    # sp192301
    High Performance Automatic Transmission Output Shaft Support Kit by Sonnax®. Enhance drivetrain strength, performance, and durability and keep your transmission performing at its best with the industry’s best automotive components...
    Designed to improve your vehicle’s performance for more enjoyable ridesManufactured from premium materials to offer a long-lasting service life
    $63.74
  • Sonnax® - High Performance Automatic Transmission Servo Return Spring Kit
    Sonnax®High Performance Automatic Transmission Servo Return Spring Kit
    0
    # sp192304
    High Performance Automatic Transmission Servo Return Spring Kit by Sonnax®. Race-Calibrated. Mystery band failures in OE transmissions are a common result of using inconsistent aftermarket servo return springs and weak OE springs prone...
    Designed to improve your vehicle’s performance for more enjoyable ridesManufactured from premium materials to offer a long-lasting service life
    $16.17
  • Sonnax® - High Performance Extreme Duty Automatic Transmission Main Shaft
    Sonnax®High Performance Extreme Duty Automatic Transmission Main Shaft
    0
    # sp192311
    High Performance Extreme Duty Automatic Transmission Main Shaft by Sonnax®. Main shaft failure is a common problem in extreme duty OE units. Sonnax extreme duty main shaft is manufactured from an exceptionally tough high-strength Aermet...
    Top-notch engineering and precision manufacturing deliver unrivaled performance and durability in the stock sizeRear spline prevents the rear internal gear journal-end from twisting off by engaging the full internal spline of the gear
    $935.03 - $1,272.28
  • Sonnax® - High Performance Automatic Transmission Band Adjustment Screw Kit
    Sonnax®High Performance Automatic Transmission Band Adjustment Screw Kit
    0
    # sp192298
    High Performance Automatic Transmission Band Adjustment Screw Kit by Sonnax®. The OE band adjustment screws can deflect or bend, causing band slippage or even transmission case breakage. Sonnax band adjustment screw features an improved...
    For use with OE or aftermarket casesStock-thread-length screw
    $34.98
  • Sonnax® - High Performance Heavy Duty Extra Wide Automatic Transmission Band
    Sonnax®High Performance Heavy Duty Extra Wide Automatic Transmission Band
    0
    # sp192238
    High Performance Heavy Duty Extra Wide Automatic Transmission Band by Sonnax®. Enhance drivetrain strength, performance, and durability and keep your transmission performing at its best with the industry’s best automotive components...
    Designed to improve your vehicle’s performance for more enjoyable ridesManufactured from premium materials to offer a long-lasting service life
    $43.76 - $47.52
  • Sonnax® - High Performance Automatic Transmission Forward Clutch Hub Washer
    Sonnax®High Performance Automatic Transmission Forward Clutch Hub Washer
    0
    # sp192213
    High Performance Automatic Transmission Forward Clutch Hub Washer by Sonnax®. Sonnax forward clutch hub front washer replaces the OE washer between the forward clutch hub and the forward drum. It is thicker than OE and is the optimal...
    Forward hub washers are thicker than OEInstallation between the forward drum and forward clutch hub reduces front unit endplay
    $47.47
  • Sonnax® - High Performance Automatic Transmission Pump Bushing
    Sonnax®High Performance Automatic Transmission Pump Bushing
    0
    # sp192219
    High Performance Automatic Transmission Pump Bushing by Sonnax®. Worn babbit pump bushings in OE transmissions allow the converter hub and inner pump gear to move off-center, causing damage to the pump gears and pump housing crescent....
    Highly wear-resistant PTFE lining for maximum durabilityTight tolerance for improved fit
    $17.90
  • Sonnax® - High Performance Automatic Transmission Rear Stator Support Bushing
    Sonnax®High Performance Automatic Transmission Rear Stator Support Bushing
    0
    # sp192221
    High Performance Automatic Transmission Rear Stator Support Bushing by Sonnax®. For maximum durability Sonnax offers rear stator support bushing, a better fitting and extremely wear-resistant, PTFE-lined bushing to stop future wear in...
    Direct replacement, no machining requiredExtremely wear-resistant PTFE lining
    $7.12
  • Sonnax® - High Performance Automatic Transmission Rear Sun Gear Thrust Washer
    Sonnax®High Performance Automatic Transmission Rear Sun Gear Thrust Washer
    0
    # sp192302
    High Performance Automatic Transmission Rear Sun Gear Thrust Washer by Sonnax®. The OE cast bronze thrust washer behind the rear sun gear in units gets compressed and distorted over time due to severe loads. This in turn causes the...
    Designed to improve your vehicle’s performance for more enjoyable ridesManufactured from premium materials to offer a long-lasting service life
    $20.89
  • Sonnax® - High Performance Automatic Transmission Sun Gear Bushing
    Sonnax®High Performance Automatic Transmission Sun Gear Bushing
    0
    # sp192305
    High Performance Automatic Transmission Sun Gear Bushing by Sonnax®. Enhance drivetrain strength, performance, and durability and keep your transmission performing at its best with the industry’s best automotive components from...
    Designed to improve your vehicle’s performance for more enjoyable ridesManufactured from premium materials to offer a long-lasting service life
    $5.00
  • Sonnax® - High Performance Automatic Transmission Oil Pump Slide Spring
    Sonnax®High Performance Automatic Transmission Oil Pump Slide Spring
    0
    # sp192218
    High Performance Automatic Transmission Oil Pump Slide Spring by Sonnax®. Sonnax now offers a high performance pump slide spring. In high performance applications, when engine speed exceeds 5800 rpm, the centrifugal force on the pump...
    Designed specifically for high RPM ConditionsKeeps pump in high volume position at high RPM
    $13.44
  • Sonnax® - High Performance Heavy Duty Automatic Transmission Planetary Rear Thrust Washer
    Sonnax®High Performance Heavy Duty Automatic Transmission Planetary Rear Thrust Washer
    0
    # sp192555
    High Performance Heavy Duty Automatic Transmission Planetary Rear Thrust Washer by Sonnax®. Enhance drivetrain strength, performance, and durability and keep your transmission performing at its best with the industry’s best automotive...
    Designed to improve your vehicle’s performance for more enjoyable ridesManufactured from premium materials to offer a long-lasting service life
    $27.18
  • Sonnax® - High Performance Automatic Transmission Throttle Cable Kit
    Sonnax®High Performance Automatic Transmission Throttle Cable Kit
    0
    # sp210901
    High Performance Automatic Transmission Throttle Cable Kit by Sonnax®. Most aftermarket carburetors and injection systems are not configured to match OE TV cable pivot travel, leading to incorrect transmission pressures and shift...
    Ensures proper transmission pressure and shift timingPrecisely sets the distance of OE TV cable travel
    $61.69
  • Sonnax® - High Performance Automatic Transmission Accumulator Piston Kit
    Sonnax®High Performance Automatic Transmission Accumulator Piston Kit (44894-01MK)
    0
    # mpn4658791216
    High Performance Automatic Transmission Accumulator Piston Kit (44894-01MK) by Sonnax®. Includes: Pistons (5), Guide Seals (10) PTFE, Solid, Seals (5) PTFE, Scarf Cut. Quantity: 5 Pcs. Accumulator piston scuffing and bore wear are...
    Dual-guide seals prevent piston-to-bore scuffingUpdated seal location allows use in scuffed bores
    $107.41
  • Sonnax® - High Performance Automatic Transmission Accumulator Piston Kit
    Sonnax®High Performance Automatic Transmission Accumulator Piston Kit (44894-01K)
    0
    # mpn4658791215
    High Performance Automatic Transmission Accumulator Piston Kit (44894-01K) by Sonnax®. Includes: Piston, Guide Seals (2) PTFE, Solid, Seal PTFE, Scarf-Cut. Quantity: 1 Pcs. Material: 6061 Aluminum. Accumulator piston scuffing and bore...
    Dual-guide seals prevent piston-to-bore scuffingUpdated seal location allows use in scuffed bores
    $34.31
  • Sonnax® - High Performance Automatic Transmission Accumulator Piston Kit
    Sonnax®High Performance Automatic Transmission Accumulator Piston Kit (22841-04K)
    0
    # mpn4658791174
    High Performance Automatic Transmission Accumulator Piston Kit (22841-04K) by Sonnax®. Includes: Piston, D-Ring Rubber (Small), D-Ring Rubber (Large), Scarf-Cut Seal PTFE (Small), Scarf-Cut Seal PTFE (Large). Quantity: Kit of 1....
    Rubber D-rings for superior sealingPTFE guide seal prevents case wear from piston contact
    $45.82
  • Sonnax® - High Performance Automatic Transmission Line Pressure Booster Kit
    Sonnax®High Performance Automatic Transmission Line Pressure Booster Kit (4L60E-LB1)
    0
    # mpn4732770055
    High Performance Automatic Transmission Line Pressure Booster Kit (4L60E-LB1) by Sonnax®. Includes: Pressure Regulator Spring, O-Rings (2), Large Ratio Boost Assembly. Length: 1.907". Sonnax hydraulic line pressure booster kits contain...
    Achieve shorter shifts and increased torque capacity without creating low-speed harshnessImproved band and clutch holding capacity for increased durability
    $27.52
  • Sonnax® - High Performance Automatic Transmission Line Pressure Booster Kit
    Sonnax®High Performance Automatic Transmission Line Pressure Booster Kit (4T65E-LB1)
    0
    # mpn4658791242
    High Performance Automatic Transmission Line Pressure Booster Kit by Sonnax®. Includes: Pressure Regulator Spring, Large Ratio Boost Assembly. Sonnax hydraulic line pressure booster kits contain stronger pressure regulator springs and...
    Achieve shorter shifts and increased torque capacity without creating low-speed harshnessImproved band and clutch holding capacity for increased durability
    $53.22
  • Sonnax® - High Performance Automatic Transmission Line Pressure Booster Kit
    Sonnax®High Performance Automatic Transmission Line Pressure Booster Kit (5R55WS-LB1)
    0
    # mpn4658791230
    High Performance Automatic Transmission Line Pressure Booster Kit by Sonnax®. Includes: Large Ratio Boost Assembly, Pressure Regulator Spring Large Dia.. Sonnax hydraulic line pressure booster kits contain stronger pressure regulator...
    Achieve shorter shifts and increased torque capacity without creating low-speed harshnessImproved band and clutch holding capacity for increased durability
    $78.71
  • Sonnax® - High Performance Automatic Transmission Line Pressure Booster Kit
    Sonnax®High Performance Automatic Transmission Line Pressure Booster Kit (350-LB1)
    0
    # mpn4658791220
    High Performance Automatic Transmission Line Pressure Booster Kit (350-LB1) by Sonnax®. Includes: Pressure Regulator Spring, Large Ratio Boost Assembly. Sonnax hydraulic line pressure booster kits contain stronger pressure regulator...
    Achieve shorter shifts and increased torque capacity without creating low-speed harshnessImproved band and clutch holding capacity for increased durability
    $97.32
  • Sonnax® - High Performance Automatic Transmission Line Pressure Booster Kit
    Sonnax®High Performance Automatic Transmission Line Pressure Booster Kit (700R4-LB1)
    0
    # mpn4658791207
    High Performance Automatic Transmission Line Pressure Booster Kit (700R4-LB1) by Sonnax®. Includes: O-Rings (2), Pressure Regulator Spring, Large Ratio Boost Assembly. Sonnax hydraulic line pressure booster kits contain stronger...
    Achieve shorter shifts and increased torque capacity without creating low-speed harshnessImproved band and clutch holding capacity for increased durability
    $17.61
  • Sonnax® - High Performance Automatic Transmission Line Pressure Booster Kit
    Sonnax®High Performance Automatic Transmission Line Pressure Booster Kit (400-LB1)
    0
    # mpn4658791205
    High Performance Automatic Transmission Line Pressure Booster Kit (400-LB1) by Sonnax®. Includes: Pressure Regulator Spring, O-Rings (2), Large Ratio Boost Assembly. Sonnax hydraulic line pressure booster kits contain stronger pressure...
    Achieve shorter shifts and increased torque capacity without creating low-speed harshnessImproved band and clutch holding capacity for increased durability
    $41.64
  • Sonnax® - High Performance Automatic Transmission Line Pressure Booster Kit
    Sonnax®High Performance Automatic Transmission Line Pressure Booster Kit (4L60E-LB2)
    0
    # mpn4658791189
    High Performance Automatic Transmission Line Pressure Booster Kit (4L60E-LB2) by Sonnax®. Includes: Pressure Regulator Spring, O-Rings (2), Large Ratio Boost Assembly. Length: 1.810". Sonnax hydraulic line pressure booster kits contain...
    Achieve shorter shifts and increased torque capacity without creating low-speed harshnessImproved band and clutch holding capacity for increased durability
    $34.37
  • Sonnax® - High Performance Automatic Transmission Line Pressure Booster Kit
    Sonnax®High Performance Automatic Transmission Line Pressure Booster Kit (4L80E-LB1)
    0
    # mpn4658791181
    High Performance Automatic Transmission Line Pressure Booster Kit (4L80E-LB1) by Sonnax®. Includes: Pressure Regulator Spring, O-Rings (2), Large Ratio Boost Assembly. Sonnax hydraulic line pressure booster kits contain stronger...
    Achieve shorter shifts and increased torque capacity without creating low-speed harshnessImproved band and clutch holding capacity for increased durability
    $35.24
  • Sonnax® - High Performance Automatic Transmission Line Pressure Booster Kit
    Sonnax®High Performance Automatic Transmission Line Pressure Booster Kit (4R70W-LB1)
    0
    # mpn4658791176
    High Performance Automatic Transmission Line Pressure Booster Kit (4R70W-LB1) by Sonnax®. Includes: Pressure Regulator Spring, Unique Forward and Reverse Boost Assembly. Sonnax hydraulic line pressure booster kits contain stronger...
    Achieve shorter shifts and increased torque capacity without creating low-speed harshnessImproved band and clutch holding capacity for increased durability
    $83.48




Sonnax is a globally recognized leader in innovative aftermarket drivetrain components. Established in 1978, Sonnax is one of the fastest-growing companies in southern Vermont. The company’s corporate headquarters include technologically advanced facilities where it designs and develops some of the best automotive parts in the industry! What’s more, Sonnax has technical development centers in many other U.S. States, including California, Georgia, New Jersey, Missouri, and Wisconsin. The company consists of a team of highly qualified specialists, remanufacturers, and rebuilders who do their utmost to further the company’s success and make it synonymous with excellence.

Whether on the road, on the street, or in the backcountry, trust Sonnax driveshaft components to enjoy an unforgettable driving experience! Made using the most sophisticated technology, Sonnax parts will improve the strength and performance of your driveline. Sonnax slip yokes are the perfect way to safely and reliably transfer power from transmission to driveshaft. Fully machined from billet steel, Sonnax bushing-style yokes will help eliminate leaking from the back of the transmission, noise, vibration, clunking, and other popular complaints. When it comes to extreme racing, you can’t go wrong with rugged roller bearing-style yokes. Forged from 4340 Chromoly steel, they are indestructible both on the street and on the track. These yokes are proven to handle the most extreme horsepower!

Along with steel yokes, the company engineers an extensive variety of aluminum components, including tubing, flange, weld, and bondable yokes. Sonnax yokes and tubing offer enhanced torque yields, maximum strength, and a perfect fit. They pair perfectly to replace your two-piece driveshaft and eliminate that weak carrier bearing. Rebuilding your torque converter? Sonnax is the only name you need to know! For many years, it has been a globally recognized full product line provider of torque converter parts that combine innovative technology with unmatched dependability. From common replacement parts to sophisticated performance converter kits, you are sure to find everything you need to complete your project.

Top-of-the-line Sonnax performance converter kits are designed taking in mind the performance characteristics of the specific vehicle. They will significantly improve acceleration and durability for long-lasting builds. Sonnex is highly praised for its line of converter friction rings made from advanced materials to handle the most demanding torque-holding applications. The company also offers an in-depth selection of valve body parts that are the number one choice for both industry’s largest transmission remanufacturers and individual transmission specialists. If you want to get your big repair jobs done faster, opt for one of the Sonnax remanufactured valve bodies. They are fully disassembled, cleaned, updated, and then hydraulically and electronically tested. And those looking to take their gas and diesel builds to the next step can choose from Sonnax high-performance and heavy-duty transmission products designed to withstand the challenges faced by racing and other hard-working transmissions.

Sonnax Reviews

4 reviews
Perfect for those looking for extra pressure for your transmission. Can be easily installed by any DIY technician. This kit will make you forget about low-speed shift harshness. Absolutely recommend!
Posted by Ian gordon (Kerrville, TX) / April 29, 20202017 Chevy Silverado
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