Availability
Sonnax automatic transmission bearing and race kits are designed to allow you to adjust the endplay to your specific transmission's tailshaft housing. The bearings are solidly built to spin smooth as silk. Don't take the chance with the cheaper brands if you want dependability and quality the others only try to attain. Always use Sonnax bearing and race kits in all your rebuilds.
( 1 )
$23.06
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$40.32
Sonnax low sprag race and bearing kits are ideal replacements for lost or damaged components. They feature a thrust bearing, inner race, and 1.013 in. thickness. If you're looking for parts for your one-way clutch from an industry leader in cutting edge design, a Sonnax low sprag race and bearing kit fits the bill.
( 1 )
$29.76
Sonnax thrust bearings are replacements for your worn automatic transmission bearings to aid in smooth operation and noise reduction. The bearings act as a guide to help limit any axial movement which can hinder performance. Manufactured to exceed OE specifications for superior quality even under extreme conditions, order the Sonnax thrust bearings best suited for your application.
( 4 )
$5.99
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$67.51
Sonnax heavy-duty intermediate overrun clutch outer races eliminate weak points. Race failure is a chronic problem with high-torque loads causing race fractures at two stress points: the radial lube holes and the sharp inside corners at the base of the outer splines. Sonnax outer races are engineered with offset lube holes so rollers never travel directly over the holes, and they are spaced so only one roller is ever positioned near a hole, radically reducing the risk of fracture. Other design improvements to the splines, plus upgraded material and a custom manufacturing process, further improve durability, doubling the torque capacity over any OE or other aftermarket races. Sonnax heavy-duty intermediate overrun clutch outer races are direct replacements offering unrivaled reliability at any power level.
( 3 )
$101.10
Sonnax premium planetary assemblies are available in various configurations to meet different build requirements. The output shaft is available in the OEM length or short length, and the billet-machined drum flange in 12-tooth or 24-tooth. They are a big step up from standard case-hardened and tempered gears. Sonnax's top-quality racing gear material (SAE9310), combined with a freeze-tempering process (-150 degrees F), results in gears with improved grain structure and stability--tougher and more resistant to wear. Sonnax premium planetary sets are fully assembled and ready to install.
Not Yet Reviewed
$669.08
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$1,205.99
Many Sonnax clutch hubs are designed for the extra-duty requirements of drag racing with Powerglide and other GM transmissions, for instance. Machined from a high-quality medium carbon steel forging, most hubs will accept five friction discs for the added load capacity needed in high horsepower race cars. All splines and thrust surfaces are precision-machined to exacting tolerances, and the unique lube hole pattern is designed to reduce drag on the friction discs in low gear. Sonnax clutch hubs are also available with or without lightening holes to reduce rotational weight.
( 16 )
$32.24
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$135.23
Sonnax Smart-Tech drum modules for racing GM TH400 transmissions improve on-track performance and consistency, leading to quicker ETs, more wins, and greater reliability. The TH400 is preferred for its overall durability and multitude of available ratios, but is known to be heavier and less efficient than the popular two-speed Powerglide. Part of the TH400 inefficiency results from the fact that the direct drum counter-rotates, spinning backwards in 1st gear, brakes to a complete stop on the 1-2 shift, then goes from 0 RPM to input RPM on the 2-3 shift. Significant energy is wasted through this cycle that robs power, upsets traction on the shifts, and contributes to broken internal parts. Compared to aluminum direct drums, the Smart-Tech drum module reduces the weight of the counter-rotating components by over 3.3 lbs.! And more significantly, because the weight of the Sonnax counter-rotating parts is closer to the centerline, there's a 68 percent reduction in energy required to stop and restart during the 1-2 and 2-3 shifts. The benefits are increased wheel horsepower, better acceleration, less shock on the shifts, and improved durability. * Complete kit (34555-01K) replaces both forward and direct drums and includes everything from intermediate sprag to the pump; a selection of Sonnax input shafts is available separately. * 100 percent new content, no used core pieces * Includes larger-diameter, 36-element sprag and sprag race that works with OE intermediate clutches * Includes six-friction forward clutch pack and seven-friction direct clutch pack Contents: * Forward Piston Housing * Forward Piston * Forward Piston Return Springs (16) * Forward Spring Retainer * Forward Snap Ring * O-Ring 1.674 in. * Lip Seals (2) * Direct Housing Assembly * Direct Piston * Direct Piston Return Springs (26) * Direct Spring Retainer * Direct Snap Ring * O-Ring 2.737 in. * Sprag Shaft * Front Sprag Retainer Plate * Heavy-Duty Sprag 36 Element * Outer Sprag Race * Rear Sprag Retainer Plate * Sprag Retainer Screws (4) 6-32 x 5/16 in. * Quad Ring Seals (2) * Anti-rotation Seal Rings (2) * Drum * Pressure Plate * Outer Snap Rings (4) * Bearing Small * Forward Clutch Hub * Bearing Large * Direct Clutch Hub * Steel Clutch Plates (4) .060 in. * Steel Clutch Plates (11) .077 in. * Friction Clutch Plates (13) .080 in. * Clutch Separators (60) .103 in.
Not Yet Reviewed
$3,052.40
Sonnax case saver retainers are designed for 1999 and later GM 4L80-E units—and are the only intermediate clutch retaining ring case saver that allows the intermediate band to be retained. The case savers fit over the intermediate band anchor lug inside the case and extends rearward to support the intermediate clutch backing plate retaining ring, preventing case lug blow-out. Over the years there have been a variety of case saver designs, however, all required eliminating the intermediate band, as is often done in drag racing trans-brake applications. Only Sonnax case saver retainers support the intermediate clutch retaining ring yet are thin enough to allow the intermediate band to be installed to provide case lug protection in all applications.
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$35.60
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$35.99
Sonnax heavy-duty automatic transmission clutch hubs eliminate hub failure. These overrun clutch hubs feature high-strength steel and thicker material for trouble-free performance when applying deceleration engine braking in D3, D2, or D1 ranges. Ready your transmission for high performance applications, such as autocross, with Sonnax heavy-duty clutch hubs. Additional info: * Two times thicker than OE clutch hubs to prevent cracking and breaking in critical areas that engage the input sprag inner race * Manufactured from high-strength 4140 chromoly steel
( 2 )
$236.88
Sonnax output shaft supports are high-strength replacements for the stock Powerglide output shaft support. They are made from high-strength 6061-T6 billet aluminum to ensure rigidity where it is needed most. The supports are purposely built for racing, eliminating the provisions for the governor. A high-quality pre-installed roller bearing keeps friction losses to a minimum, while the billet aluminum construction lowers the weight dramatically. The Sonnax output shaft supports can be used with both long and short OEM and aftermarket tailshaft housings to allow for use in almost any drag racing application. They feature a true bolt-on installation for the popular Powerglide transmission and can benefit both bracket ET and professional drag racers.
( 2 )
$92.47
Sonnax knows you want your transmission to shift like a dream. Their automatic transmission bands are extra-wide intermediate bands suitable for heavy-duty, commercial, and 4x4 vehicles. These drop-in replacements provide 15 percent more holding capacity and feature a 60 percent thicker case anchor, decreasing the chance of band failure under severe conditions. (Note: The red-lined version of these Alto bands is designed for high-torque street racing applications. The Kevlar®-lined version is too aggressive for street use and best suited for high performance racing applications.)
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$46.93
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$267.47
Sonnax stator support shafts provide added strength and solid support to the torque converter stator. They are manufactured from high-quality, heat-treated alloy steel--and the roller burnish finish in the seal bore improves sealing for better pressure. The spline and knurl areas have been selectively induction-hardened to resist wear; a pronounced knurl enables more positive press fit. The Sonnax stator support shafts are specially-designed for severe-duty race applications.
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$56.38
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$60.45
Sonnax retaining rings are stamped from high-strength, roll-tempered steel, providing additional muscle to resist deflection better than mild steel OE retainers. Successful ET racing requires consistent transbrake release; that usually means utilizing stiffer springs—which leads to the need for stronger spring retainers that won't be deflected. Sonnax no-flex reverse spring retainers are small solutions to faster transbrake response times.
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$10.99
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$22.51
In certain applications there is no way to pilot a reamer to repair a worn valve body, forcing rebuilders to purchase new ones. This patented self-aligning fixture with specially designed tool kits allows these valve bodies to be repaired. The fixture provides an external rigid pilot bore for the reamer and guide pin. The self-aligning feature allows the fixture to be used on multiple valve bodies and valve bores. The fixture base is large enough to provide ample support for the valve body. Various transmissions locate some valve bores in the pump body rather than the valve body. These larger pump bodies do not readily fit onto the standard VB-FIX base plate. Sonnax offers an oversized pump base plate, VB-06, that allows large passenger vehicle pump bodies to be easily mounted and clamped to the VB-FIX for repair. Additional notes: * Patented, unique self-aligning device produces consistent, reliable results and eliminates the potential for reaming failures * Special tool kits have been designed to service a specific valve train bore, and must be used in conjunction with the valve body reaming fixture VB-FIX. Part numbers for these kits begin with an "F-" to distinguish them from the traditional Sonnax tool kits that can be used as standalone tools. * Contents: -- Base plate standard -- Clamp mounting plate -- Clamp plate round -- Outer races (2) -- Inner race -- Studs (3) threaded -- Washers (3) flat -- Wing nuts (3) -- Socket cap screws (4)
Not Yet Reviewed
$252.99
The ideal GM TH400 upgrade for any power level, Sonnax heavy-duty forward drums (34554-01) feature a unique combination of high-strength, light weight, and a cutting-edge design to optimize transmission performance. Racing applications quickly push the heavy, cast-iron OE drum over its limits, with failure most common at the weak point where the shaft and drum connect. The problem can be addressed with a larger spline and lighter-weight aftermarket aluminum drum—but durability becomes a huge issue with wear of the clutch splines, shaft spline connection, and seal ring bore. To dramatically reduce weight and deliver the ultimate in reliability, the Sonnax high-strength, chromoly steel drum is custom-engineered with several lightening features for a low rotating mass. It weighs 3 lbs. less than the OE drum and is just 3 oz. heavier than a common aluminum drum. Weight is reduced carefully, without compromising strength, by ribbing the front of the drum, adding clutch splines (28 vs. 14) and lightening holes, plus reducing the diameter inner section of the drum at the middle seal ring area. This versatile drum upgrade has an oversized 28-tooth shaft-to-drum spline and can be used with a variety of input shaft styles. This includes Sonnax 1 in. diameter, 30-spline heavy-duty input shaft 30280-02, Sonnax 1 1/8 in. diameter, 35-spline big input shaft 35280-02, and other aftermarket shafts with 28-spline connection between shaft and drum: * Ultra-modern drum delivers both high-strength and light weight for unrivaled performance at any power level * Compatible with Sonnax and other aftermarket 28-spline input shafts * Optimized for use with rubber clutch separators for applications with clean neutral setups * Clutch spline major diameter is reduced slightly, and two sets of full-length clutch splines added to back up clutch separators * Lightening holes correspond to input speed sensor locations in aftermarket cases for more accurate converter and shift data * Middle seal is eliminated—an aluminum clutch volume spacer kit 34554-11K is available separately for applications in which clutch fill/drain time may be a concern * Sonnax high-RPM checkball capsule 57510-01 is installed to eliminate pressure drop at high (5500+) RPM, a common problem with OE and other aftermarket checkballs
Not Yet Reviewed
$358.80
In some transmissions, the low/reverse sprag elements, end caps, and retainer plates are prone to wear, while the race is often unaffected, resulting in a bind-up going into 2nd gear or a 1-2 flare. Sonnax low/reverse sprag rebuild kits allow replacement of the caps, elements, and retainer plate without the expense of buying a full sprag assembly. Select the kit designed for your transmission. Contents: * Sprag clutch element without race * End caps (2) * Retainer plate * Snap ring
Not Yet Reviewed
$65.32
Sonnax anti-wear washer kits prevent metal-to-metal contact. Direct contact between your aluminum Powerglide ring gear and the reverse clutch pack pressure plate causes damage to both components and generates metal debris that circulates throughout the transmission. With the OE design, this is tolerable at original speeds, but is a far greater concern in racing transmissions at higher operational speeds. Sonnax kits include a shim and anti-wear washer that will work with any ring gear that accepts stock-type reverse clutch plates.
( 1 )
$19.37
Sonnax rubber clutch separators can be used in racing transmissions to help keep clutch steels separated and reduce open clutch drag when the clutch is disengaged. The friction clutch thickness will determine what size separator you need. Gain the advantage by getting rid of disengaged clutch drag with an assist from the Sonnax silicone rubber clutch separators best suited for your application.
Not Yet Reviewed
$24.20
When building a racing Powerglide, it's necessary to plug the hole left by the vacuum modulator. Sonnax vacuum modulator plugs for the GM Powerglide transmission are made from anodized aluminum, and the gasket is included.
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$20.10
Sonnax heavy-duty reverse pistons offer high-strength that will not break at racing pressures. Made from 6061 T-6 billet aluminum, Sonnax reverse pistons are configured to utilize four frictions and five steels, but can also be machined to accept additional frictions and steels for trans-brake applications. They're customizable for any application. To reduce rotating weight in Circle Track applications, two frictions (rotating) and seven steels (non-rotating) can be used. Sonnax heavy-duty reverse pistons include inner and outer seals.
Not Yet Reviewed
$107.54
Sonnax rubber clutch separators can be used in GM TH400 racing transmissions to help keep clutch steels separated and reduce open clutch drag when the clutch is disengaged. Friction clutch thickness determines what size separator you need. Each Sonnax separator in ORCS-070-380 measures .070 in. in diameter—ideal for use with friction clutches about .060 in. thick. Specs: * Material: Silicone rubber * Diameter: 0.070 in. * Length: 0.380 in. * Package quantity: 70
Not Yet Reviewed
$24.98
Upgrade your transmission's clutch pack with Sonnax automatic transmission clutch steels. These premium-quality steel parts give you the best combination of coefficient of friction and performance. Sonnax offers severe-duty clutch steels for use in a variety of automatic transmissions—including racing applications. These steels are available with up to double the number of external teeth as OE. With more teeth engaged, wear should be reduced dramatically. Anti-drag tabs create the maximum clearance between the friction and steel when the clutch is disengaged. Turbulator holes reduce parasitic drag. Combining anti-drag tabs and turbulator holes significantly reduces the heat generated when the clutch freewheels.
Not Yet Reviewed
$11.26
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$140.71
Sonnax ring gear stabilizer kits reduce high-speed vibration and drag, while also preventing damage to short pinion gear teeth. Powerglide transmissions with poorly supported planetary ring gears will experience vibration at high speeds and broken reverse friction plates as it moves off the transmission center line, oscillating out of control. These Sonnax kits install easily on Sonnax bolt-together, 1.80 and 1.69 ratio planetary carriers, and with proper support, the ring gear stays on-center.
Not Yet Reviewed
$208.76
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$214.05
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