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Buy one of these qualifying items and earn more savings! Similar to gift certificates, Summit Bucks rewards you earn today can be applied to Summit Racing orders in...
Buy one of these qualifying items and earn more savings! Similar to gift certificates, Summit Bucks rewards you earn today can be applied to Summit Racing orders in the future.*
*Not redeemable for cash; cannot be used to buy gift cards.
Buy one of these qualifying items and earn more savings! Similar to gift certificates, Summit Bucks rewards you earn today can be applied to Summit Racing orders in the future.*
*Not redeemable for cash; cannot be used to buy gift cards.
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Summit Bucks
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
$999.99
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$1,205.99
Summit Bucks
If you're looking for an easy upgrade to your automatic transmission, Sonnax Servo piston kits may be the answer. The improvement in shift quality is an immediate and noticeable value. These direct replacement kits will help to eliminate a bit of a "sloppy" gear performance caused by faulty OEM servo units. With all necessary rings and seals to prevent leakage and handle higher pressure, Sonnax servo pistons can be your link to greater band apply force. Choose the kit that matches your vehicle specs, then expect faster and firmer shifts!
( 30 )
$67.62
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$352.46
Summit Bucks
Sonnax slip yokes are forged, not cast, for greater strength, and they undergo a precision-machining process to guarantee exceptional balance and minimal runout. They are 100 percent leak-tested, the seal plug is O.D. ground for superior seal, and yokes are air-tested to 40 psi. Sonnax slip yokes are available in different lengths and tooth counts to fit your specific transmission application.
( 110 )
$178.27
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$305.44
Summit Bucks
Sonnax 10-clutch drum kits are optimized for Powerglide performance applications. Using the patented Sonnax 10-clutch drum system, the drum and piston accept 10 frictions and 10 Kolene steels, increasing lockup surface to allow significantly more torque than modified OE drums. The drum features a piston bore that is .060 in. deeper for greater piston travel. Kits include: * Complete 10-clutch drum kit with all related parts, including installed PTFE-coated bushing * Includes ten .060 in. frictions and ten .060 in. thick, 12-tooth Kolene steels * Excess material removed from high-strength, cast steel drum to reduce rotating mass * 6061 forged aluminum piston will not crack at high operating pressure like cast pistons * Forged chromoly steel clutch hub with lightening holes
( 1 )
$490.36
Summit Bucks
Sonnax 10-clutch drum, hub and piston kits are optimized for Powerglide performance applications. Using the patented Sonnax 10-clutch drum system, the drum and piston accept 10 frictions and 10 Kolene steels, increasing lockup surface to allow significantly more torque than modified OE drums. The drum features a piston bore that is .060 in. deeper for greater piston travel. Sonnax 10-clutch drum, hub and piston kits include shims to make installation easy.
( 2 )
$191.36
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$494.00
Summit Bucks
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
Summit Bucks
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
Summit Bucks
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
Summit Bucks
Worn babbit pump bushings in your GM Powerglide, 350, 400, or Allison AT540 transmission can allow the converter hub and inner pump gear to move off-center, thus causing damage to pump gears and the pump housing crescent. You can replace the worn originals with automatic transmission oil pump bushings from Sonnax. These direct replacements have tighter tolerances for improved fit over OE units, and they're lined with highly wear-resistant PTFE to help maximize the life of the older style and increasingly rare pumps. Order the bushings recommended for your application.
( 2 )
$3.84
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$7.95
Summit Bucks
Replace your worn-out or damaged pump gears with a set of Sonnax automatic transmission oil pump gears. Their high-quality precision construction meets OEM pump specifications.
( 5 )
$19.98
Summit Bucks
Sonnax servo piston seals are offered to meet your specific needs and budget. Maybe you don't need a complete seal kit. For those times, Sonnax provides individual items—so you get exactly what you need to service your Powerglide transmission. Sonnax seals deliver a superior, positive seal for renewed no-leak performance.
( 1 )
$1.99
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$10.92
Summit Bucks
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
Summit Bucks
Sonnax wear plates are direct replacement plates providing an anti-friction surface and protection from damage for your Powerglide. They are constructed from case-hardened steel for long-lasting durability. Get maximum performance from your transmission with quality Sonnax components.
( 1 )
$15.49
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$18.26
Summit Bucks
Sonnax high clutch Kolene steels provide heavy-duty high performance in your Powerglide. They offer several styles to choose from, including severe-duty steels with turbulator holes and 24 external teeth. The latter are specifically design for Sonnax 24-lug clutch drums to dramatically reduce wear and the heat generated when the clutch freewheels.
Not Yet Reviewed
$14.49
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$25.93
Summit Bucks
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.
( 1 )
$20.10
Summit Bucks
Sonnax automatic transmission pump bolts are premium rebuild hardware. These replacement fasteners are flanged and available in multi-piece sets. Trust your Powerglide details to Sonnax, a leading supplier of innovative drivetrain components to the automotive aftermarket.
Not Yet Reviewed
$18.11
Summit Bucks
Sonnax front pump stud kits are a must when aligning the pump on your stock Powerglide case. They will prevent you from stripping the threads in the case when bolting the transmission during routine maintenance. Use genuine Sonnax parts and avoid the breaking or wear-and-tear of vital components. These kits include seven serrated flange hex head nuts and double-ended studs.
Not Yet Reviewed
$15.39
Summit Bucks
Sonnax 10-clutch drums are optimized for Powerglide performance applications. Using the patented Sonnax 10-clutch drum system, the drums accept 10 frictions and 10 steels, increasing lockup surface to allow significantly more torque than modified OE drums. They feature a piston bore that is .060 in. deeper for greater piston travel than was available from earlier Sonnax 10-clutch drums. Features include: * Drum holds .060 in. frictions and .060 in. thick steels (10 each) * Excess material removed from high-strength, cast steel drum to reduce rotating mass * Accepts 24 or 12-tooth steels * Use with Sonnax clutch pistons and 10-clutch hubs with lightening holes Note: Sonnax 10-clutch drums and pistons should only be used as matched parts.
( 1 )
$156.00
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$374.40
Summit Bucks
Get in the right gear with Sonnax shift levers. These replacement levers and kits are designed to work with most competition-type shifters—without modifications to the case. Sonnax offers a choice of one-piece and bolt-together levers; many include O-rings on the shafts to prevent leakage, and all are zinc plated for corrosion protection. Upgrade your stock shifter levers with replacements from Sonnax.
( 14 )
$19.91
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$103.07
Summit Bucks
Sonnax reverse piston seal kits replace seals in GM Powerglides and can be used with OE or aftermarket pistons. The kits include inner and outer reverse clutch piston seals.
( 1 )
$5.81
Summit Bucks
The 10-clutch drum kit is optimized for Powerglide performance applications—but over time, parts are subject to wear or become lost. Sonnax 10-clutch drum kit replacement components are available to get your transmission back up to speed.
Not Yet Reviewed
$41.37
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$53.25
Summit Bucks
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.
( 2 )
$56.38
Summit Bucks
Sonnax automatic transmission clutch friction plates limit slipping for smoother shifts. Their selection of red-material frictions is available in several types and thicknesses to meet the needs of your specific rebuild. High performance, heavy-duty friction plates from Sonnax revive the winning performance of your automatic transmission's clutch.
( 1 )
$11.32
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$163.90
Summit Bucks
Sonnax Super-Hold servo kits offer increased apply area over the OEM servo for more holding force between shifts. They are manufactured from anodized aluminum and include mounting seals and hardware for your specific transmission model. Their improved seal design will conserve pump volume.
( 25 )
$292.41
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