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Sonnax shift improver performance packs combine innovative heavy-duty performance calibration for firmer shifts under load without sacrificing low-speed drivability. The precision components in these kits upgrade your transmission for maximum achievement and durability by recalibrating pressures, recalibrating shift accumulation, and including improved parts for areas that commonly wear. They are suitable for any heavy-duty application and are a critical foundation for other upgrades when modifying the transmission for high performance use. Sonnax shift improver performance packs additional facts and features: * Shorter shifts, which get progressively firmer with load * Faster pressure increase and higher overall pressure for greater clutch/band holding power * Three ultra-reliable, patented, billet pinless accumulator pistons * Unique 1-2 accumulator spring combination for shifts with character * Improved high rpm pressure * Third accumulator valve gets the 2-3 right the first time, every time * Consistent results, no guessing on calibration * Prevents worn accumulators and separator plate * Optional TCC on-off conversion prevents excess TCC pressure
( 6 )
$356.54
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Sonnax flanged yokes will complete your driveshaft connection. These high performance 6061-T6 aluminum parts are precision-machined to be stronger than the original cast steel yokes, as well as being lighter in weight. Sonnax builds these yokes for exceptional balance and superior craftsmanship, for a show-quality driveline.
( 23 )
$262.46
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$282.02
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These TCI transmission Master Racing overhaul kits are designed for racers who maintain their own transmissions. They contain parts that are required when freshening up an existing competition transmission. You'll receive the high performance filter, clutches, steels, seals, gaskets, and bushings normally replaced during a rebuild. In addition, kits for late model GM overdrive transmissions also include a new performance band.
( 58 )
$251.95
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$573.95
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 )
$352.46
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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
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Sonnax heavy-duty remanufactured valve bodies are built to overcome chronic shift and converter clutch apply complaints. It provides firmer shifts and a moderately increased pressure curve to improve performance, especially in truck and towing applications. Numerous Sonnax valve upgrades are included to restore hydraulic clearances that lead to shift complaints, clutch distress, converter complaints and codes, solenoid issues and pressure problems. Line pressure rise has been moderately increased to overcome shift complaints, delayed engagements, and to increase holding power to the clutches. To guarantee the highest level of operational performance, this remanufactured valve body is tested on state-of-the art equipment to verify that solenoid feed, clutch, converter, and line pressures match or exceed OE specifications. Choose your preferred kit packaged for your transmission. The valve body includes the following: * Oversized TCC regulator valve and sleeve, and limit valve spring for firmer TCC application * O-ringed bore plugs and abuse plugs * New accumulator control valve and sleeve with spring * Oversized AFL line up * New forward accumulator piston and seal * New pressure switch manifold * New EPC solenoid * New TCC PWM solenoid Kit contents: * Remanufactured valve body * Separator plate * Upper case gasket plate * Lower valve body gasket plate * 1-2, 3-4 accumulator springs * EPC solenoid harness adapter for 2003 to later units * Sonnax line pressure booster kit
( 3 )
$372.32
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ACDelco GM Genuine Parts wheel hubs provide the attachment point for the brake rotor and road wheel, and are GM-recommended replacements for your vehicle's original components. These OE hubs are supported and allowed to rotate by the wheel bearing. They've been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors. Notes: * Do not operate a vehicle with a worn wheel hub assembly. Here are warning signs to look for: - Grinding when the vehicle is in motion - Knocking or clunking - Looseness - Wheel vibration and/or wobble - Humming, rumbling, squealing, roaring, or growling - ABS, Traction Control, Stability Control light on
Not Yet Reviewed
$311.99
Summit Bucks
Moog wheel bearing and hub assemblies feature problem-solving innovations and include application-specific design enhancements. They are engineered to overcome problems and deliver smooth, reliable performance. Features and benefits of Moog wheel bearing and hub assemblies include: * Roll-form design ensures consistent and optimal preload * Precision-matched components; rigorously controlled manufacturing processes ensure exact matching of bearing raceways and rolling elements to consistently deliver superior performance and minimize noise and vibration * Moog abrasion-resistant ABS cord manufactured from a blended material that offers increased abrasion resistance and better protection from adverse conditions * For applications that require it, ABS molded shield and socket connections for even greater defense against contamination * Premium quad-lip seal design ensures maximum protection from contamination * Wheel studs have a protective coating that helps prevent rust and corrosion, enabling easier removal and proper torqueing of wheel nuts
( 702 )
$250.99
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$385.99
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ACDelco GM Genuine Parts automatic transmission clutch housings are a factory-recommended replacement component. They will provide the same performance, durability, and service life you expect from General Motors. Order the clutch housing designed for your vehicle application.
( 4 )
$465.99
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No weak link! Sonnax heavy-duty one-piece input shafts are custom-forged from one solid piece of ultra-high-strength 300M steel. Much better than the weak OE 2-piece shaft/hub design, this single piece delivers a more robust build that will work hard longer. With durability and performance features which are second to none; your only choice should be Sonnax heavy-duty one-piece input shafts.
Not Yet Reviewed
$440.14
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$454.61
Summit Bucks
Main shaft failure is a common problem in performance and heavy-duty GM TH400, 4L80-E and 4L85-E units. Sonnax replacement heavy-duty main shafts are manufactured from high-strength 300M with proprietary heat treatment and post heat-treat processing for exceptional performance, durability and value. These shafts are recommended for applications up to 1,000 hp. Additional details: * Advanced torsional design with spline and cross hole refinements for additional strength * Direct replacement for OE shafts
Not Yet Reviewed
$425.28
Summit Bucks
Sonnax adapter flange yokes are an ideal upgrade for modified performance vehicles, allowing an easy conversion from a 2-piece driveline to a one-piece, U-joint-style driveline. The yokes will dramatically increase strength and durability while reducing future maintenance costs. Benefits: * Machined 6061 T-6 aluminum construction * Eliminates the troublesome giubo and/or CV joint(s) * Great for drivetrain swaps and retrofits in custom applications, such as street rods and hot rods
Not Yet Reviewed
$287.66
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$311.37
Summit Bucks
ACDelco offers transmission bellhousings for a wide range of vehicles from the 1990s and up. Built from aluminum, these GM-recommended replacements deliver the quality and durability of original equipment, plus a factory fit and solid performance. The bellhousings are available for nearly two dozen transmission models. Order the unit designed for your application.
( 8 )
$287.99
Summit Bucks
ACDelco GM Genuine Parts CV axle shafts transfer torque from your vehicle's transmission or differential to its wheels, and are GM-recommended replacements for your vehicle's original components. These shafts have constant velocity (CV) universal joints at each end to allow your wheels and suspension to articulate. The axle shafts have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors. Order the model recommended for your specific application.
( 12 )
$256.99
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$512.99
Summit Bucks
ACDelco GM Genuine Parts includes all the automatic transmission rebuild components you need to return your tranny to optimum performance. They are designed, engineered, and tested to rigorous standards, and are backed by General Motors. From the smallest to the biggest pieces, you can trust reliable ACDelco parts to restore, repair, and renew your GM.
( 12 )
$304.99
Summit Bucks
ACDelco GM Genuine Parts clutch master cylinders are designed, engineered and tested to rigorous standards, and are backed by General Motors. These true OE parts are specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle, promising the correct fit, an easier install, and the expected performance. For optimal operation, safety, and confidence on the road, service your GM with the parts it came with—ACDelco clutch master cylinders.
( 15 )
$286.99
On Sale
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Mishimoto automatic transmission pans are direct-fit, high-performance upgrades cast from high-quality aluminum and powdercoated Gunmetal Gray. Each of these pans have a sleek design and bottom ribs, that not only adds to the overall aesthetic of your truck, but also provides improved cooling performance. Internal baffles reduce sloshing and enhance heat dissipation, resulting in smoother transmission performance. Mishimoto aluminum transmission pans offer precision sealing for leak-free performance and increased ATF capacity to help maintain optimal transmission operation. Choose the pan designed for your vehicle. Additional notes: * Precision-machined sealing surfaces are ready to accept factory-style gasket or sealant * Dovetail-style groove with O-ring seal ensure a fool-proof, reliable seal Contents: * Cast aluminum transmission pan for long-lasting performance * Magnetic drain plug * Silicone bolt retainers hold fasteners in place for easy installation * Socket head cap screws with washers * 1/8 in. NPT plug * O-ring seal (where applicable) * Mishimoto Lifetime Warranty
Not Yet Reviewed
$371.95
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$466.95
$334.76
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$420.26
Summit Bucks
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
Summit Bucks
Sonnax torque converter conversion kits are designed to upgrade the existing torque converter for improved performance characteristics like better acceleration, increased power, and smoother shifting. Many conversion kits focus on changing the stall speed, which is the engine rpm at which the torque converter fully engages, allowing for more aggressive launches or better towing capability depending on the chosen stall speed. Some kits include modifications to improve the lock-up function of the torque converter, leading to better fuel economy at cruising speeds by eliminating slippage. The torque converter conversion kits by Sonnax come with various internal component options, allowing fine-tuning to match your vehicle's specific needs and your driving style.
Not Yet Reviewed
$328.58
Summit Bucks
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.)
( 8 )
$267.47
Summit Bucks
Sonnax splined stub and sleeve kits make it easy to build, balance, and service a rugged performance driveshaft. These high performance, heavy-duty kits have unique features to dramatically raise the torque capacity of the driveshaft while guaranteeing hassle-free assembly. Every yoke/stub shaft and splined sleeve is carefully machined from 6061 T-6 aluminum and matched during manufacturing to deliver the most precise and uniform spline fit available. Sonnax also uses more spline teeth than other aftermarket slip and stubs. You can overcome many driveshaft problems by converting from a 2-piece shaft to a one-piece aluminum build outfitted with a Sonnax slip and stub. From eliminating critical failure points to adding great flexibility in customization, they offer the best way to reliably drive horsepower from the engine and transmission to the differential in today's performance vehicles. Kits may also contain boot and boot clamps. For a strong, lightweight and durable driveline ideal for upgrading muscle cars and adapting powertrains to custom street/strip vehicles, select the Sonnax splined stub and sleeve kit designed for the U-joint and tube diameter ideal for your vehicle.
Not Yet Reviewed
$520.53
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 )
$374.40
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 )
$494.00
Summit Bucks
Clearance
ACDelco new torque converters are GM OE replacements that offer the same performance, durability, and service life you've come to expect. With quality steel housings and internal components, ACDelco torque converters are sure to deliver the performance and fit needed for your vehicle.
( 1 )
$568.99
$314.50
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