Availability
Showing In Stock Items. Show All 72 Items.
Summit Bucks
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
—
$282.02
Summit Bucks
Sonnax externally adjustable low/reverse servo kits make band maintenance quick and easy. They offer an ideal way to improve reliability and make staging more consistent and predictable. Checking L/R band adjustment after repeated use is good practice. Unfortunately, OE servos with steel covers are difficult to adjust in a vehicle, so a quick check with such a servo installed is impractical for most racers. Sonnax externally adjustable servos provides an improved design that makes checks and adjustment of the L/R servo easy. There is no cover or access plug to remove because the adjuster itself extends through the cover. A quick check is done simply by pushing on the end of the adjuster and observing the movement of the piston relative to the servo cover. Select the kit designed for your transmission. Features: * Quickly check and adjust the low/reverse band to prevent trans-brake malfunction * Unique servo cover and adjuster design makes in-vehicle band service easy * Works with or without OE 1-2 accumulator piston Included: * 6061 Anodized billet aluminum cover * Piston * Pin * Jam nut * Cover seals -- Two PTFE, one extra * Piston seal * Cover O-ring * Pin O-ring Kit for TH400 will also include: * Cover flange O-ring * Bolts (6) * Washers (6)
Not Yet Reviewed
$353.26
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 )
$252.99
—
$287.99
Summit Bucks
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
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
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
Summit Bucks
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
Summit Bucks
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 )
$410.99
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
—
$311.37
Summit Bucks
ACDelco Gold wheel bearing and hub assemblies are the high-quality alternative to original equipment parts. These unitized wheel bearings contain dual ball or tapered roller bearing elements sealed with a lifetime lubrication. ACDelco Gold replacement parts are manufactured to meet your expectations for fit, form, and function, making them a smart choice for General Motors vehicles, as well as most makes and models, including special applications. The assemblies are available in dozens of options for fitment on countless vehicles from the 1970s and up.
( 5 )
$258.99
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 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
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
—
$454.61
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
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.
( 109 )
$305.44
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
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 )
$288.99
—
$308.50
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
Summit Bucks
ACDelco GM Genuine Parts offers transmission clutch kits for a variety of muscle and sports cars, such as Corvettes and Camaros. These OE replacements include clutch disc and pressure plate designed for your specific vehicle. The parts are engineered and tested to rigorous General Motors standards. Order the kit recommended for your application.
Not Yet Reviewed
$432.99
—
$484.99
Summit Bucks
ACDelco GM Genuine Parts differential drive pinion gear yokes are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These are the true OE parts installed during the production of or validated by General Motors for GM vehicles, so you are confident they will fit perfectly and perform optimally in your Chevrolet, Buick, GMC, or Cadillac vehicle. Order the yoke designed for your vehicle.
( 1 )
$316.99
Summit Bucks
Sonnax universal remanufactured valve bodies have been uniquely designed to fit a variety of '99-later Chrysler applications, regardless of OE checkball or solenoid configuration. The convenience of stocking one SKU number for various applications saves time, money and interchangeability confusion. The channel casting has been resurfaced to SAE recommended flatness and surface finish. The seasoned casting warpage is now eliminated, removing cross-leaks and manufacturing burrs that resulted in clutch distress and shift complaints. A new separator plate is also installed, along with gaskets, to seal the critical surfaces between the valve body and channel casting. Heavy-duty/high performance accumulator pistons with dual-guide seals are installed to prevent piston-to-bore scuffing and restore clutch pressures due to leakage. Patented Sonnax valves are installed to restore hydraulic pressures and eliminate shift complaints, trouble codes, converter concerns and overdrive clutch distress. Their patented accumulator cover plate—made from stronger, thicker material and secured with additional screws—is also installed to prevent flexing or breakage. To guarantee the highest level of operational performance, these remanufactured valve bodies are tested on state-of-the art equipment to verify that pressures match OE specification. Product notes: * One SKU fits all applications, saving time, money and confusion * Resurfaced OE channel casting eliminates warpage, burrs, and cross-leaks cost effectively * New separator plate and gaskets provide critical seal between cast surfaces * Patented Sonnax valves and pistons restore hydraulic integrity of circuits to eliminate shift complaints and clutch distress * Patented Sonnax accumulator cover plate stronger than OE to prevent flexing and breaking
( 2 )
$421.93
—
$438.31
Summit Bucks
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 )
$314.50
—
$400.99
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
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
Modal Header
Truck / SUV
Jeep®
Restoration
Stock Replacement
Late Model Muscle
Tools
Gifts, Clothing, & More
Circle Track
Street Rod
Powersports
Paint & Body
Marine
Jr Dragster
