Transmission & Drivetrain
Availability
Building awesome horsepower is only part of the story. You need to deliver all that power to your car or truck’s wheels! We’ve got torque-hungry high performance automatic...
Building awesome horsepower is only part of the story. You need to deliver all that power to your car or truck’s wheels! We’ve got torque-hungry high performance automatic and manual transmissions for street and strip applications, torque converters and clutch sets, flexplates and flywheels, plus limited-slip differentials, spools, lockers, ring and pinion sets, driveshafts, U-joints, axles, bearings, C-clip eliminator kits, transfer cases, shift kits, and rebuild kits. We also have a wide selection of trans-brakes, shifters, cables, and accessories—everything you need to put the power to the ground, Summit style.
Building awesome horsepower is only part of the story. You need to deliver all that power to your car or truck’s wheels! We’ve got torque-hungry high performance automatic and manual transmissions for street and strip applications, torque converters and clutch sets, flexplates and flywheels, plus limited-slip differentials, spools, lockers, ring and pinion sets, driveshafts, U-joints, axles, bearings, C-clip eliminator kits, transfer cases, shift kits, and rebuild kits. We also have a wide selection of trans-brakes, shifters, cables, and accessories—everything you need to put the power to the ground, Summit style.
Improve your on and off-road ride quality with Rough Country premium N3 shocks! These 10-stage variable valving, high-pressure nitrogen charged absorbers offer a fantastic blend of off-road action and smooth highway ride quality. With a durable 18mm spring-loaded piston rod and faster cooling 54mm shock body, they offer up to 36kN tensile strength for a long lifespan of impressive vibration dampening. They also feature natural rubber bushings and an eye-catching metallic silver paint. Build your perfect setup with an assist from the Rough Country premium N3 shocks best suited for your application. More product features include: * Hardened chrome piston rod * Durable 35mm piston * Military-spec fluid rated to -40 degrees C (-104 degrees F)
Not Yet Reviewed
$119.95
Strange shock bearings are available for single or double adjustable shocks. They are PTFE lined for smooth performance with your shocks. Choose the size needed.
Not Yet Reviewed
$12.99
Sierra Marine offers a wide range of OEM-equivalent parts to maintain and/or repair your watercraft, including shock rod pins. These components are designed to replace outdated or damaged components to restore performance and functionality and have been engineered to meet today's high horsepower engine demands while withstanding the harsh marine environment. For over 50 years, Sierra has supplied the best aftermarket parts in the marine industry—so boaters can enjoy the best of times on the water. Upgrade your boat with these shock rod pins from Sierra Marine.
Not Yet Reviewed
$29.99
Trail-Gear is the first in the industry to develop a series of Tacoma Solid Axle Swap (SAS) kits that are complete, user friendly, and affordable. They offer several different Tacoma SAS kits to allow you to pick the kit that is best suited and priced for your unique build. Every Tacoma component in these Trail-Gear solid axle swap kits has been engineered for maximum durability and tested using the most advanced engineering technology in the industry. With the full color, in-depth installation instructions, anyone with minimal mechanical and welding skills can install these kits in one or two weekends. All gussets and frame supports are included, so your Tacoma will be much stronger when you finish than it was from the factory. Built by Tacoma owners for Tacoma owners, if you have any questions you can call Trail-Gear's technical support line with confidence in knowing that you will be speaking with a fully trained professional, who will assist you with any questions that you may have during your installation. Trail-Gear Tacoma Solid Axle Swap SAS "C" kits: * Front spring hanger * All spring and shackle bushings * Shock hoops * 5125 Bilstein shocks * Frame tube jigs * Frame tubes * Shackle mount kit * Front frame reinforcement plates (with IFS box mount kit incorporated) * Steering shaft * Steering couplers * Fire wall plate * Bump stop kit * Heavy-duty front leaf springs * Front extended brake line * Fully loaded left and right calipers * Left and right caliper hard lines * Vented brake rotors * Knuckle service kit with wheel bearings * U-bolt flip kit * Tacoma high-steer kit (regular high-steer kit for 1979-85 solid front axles) * Fully loaded Six Shooter knuckle kit * Knuckle hardware * 1986-88 IFS steering box * Oil pan kit (2.7L or 3.4L) * Power steering hose conversion kit * Single t-case crossmember * Full color installation instructions * Rock Assault front axle housing * Rock Assault steering stops * Dirty 30s 30-spline Birfield/axle kit * Assembled high-pinion 3rd member * Your choice of a Detroit or ARB Locker Note: Compressor is included in Kit C with ARB Locker.
Not Yet Reviewed
$7,999.99
Spicer Drivetrain Products front axle shafts feature an increased U-joint size that provides 25 percent higher yield strength than original U-joints. They offer unparalleled strength and longer life—the outer stub is re-engineered for added strength; improved snap ring retention reduces shock load failures; and material has been removed from the body and added to the yoke ears (to equalize deflection through the yoke and reduce bearing cap spinning). The axles are made from durable steel, with a micro-alloy improving their strength and a statistically controlled heat treatment ensuring proper hardness. Order the replacement model designed for your vehicle application.
( 129 )
$94.99
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$1,949.99
Summit Bucks
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
Torque converters are considered one of the most mysterious mechanical components in today's vehicles. They function like a clutch, and keep the engine running even when the vehicle comes to a halt. By designing the stall speed to match both the engine and desired stall speed, ACC Performance converters help low-end idle speeds, improve performance, and acceleration. ACC Performance Products has emerged as an out-right leader in torque converters and here's why: * Boss Hogs are welded, not furnace-brazed; furnace brazing is not the best way to adhere torque converter components, it will erode and ruin the stators and all rotating parts * Industrial Torrington bearings handle more torque than smaller, uncased needle bearings * Aircraft aluminum washers instead of fiber washers put more horsepower and torque directly to the ground * ACC converters are hand-built and tested to ensure that you get the best converter money can buy * With returns below one percent, you are assured of the highest quality parts available * Street Bandit converters are designed to handle as much as 650 hp * Custom-engineered turbine hubs maintain the highest quality, strength, and durability * Stators are built with high-flow vents and channels for greater cooling to handle greater power and higher temperatures * Engineered with a single bolt pattern that makes ACC converters surprisingly light to free up your motor and allow it to gain rpm quicker Notes: * Boss Hog Street Bandit torque converters are not designed to handle the extreme shock and abuse of nitrous oxide or trans-brakes * It is imperative that a transmission cooler be added with any torque converter that is rated over stock stall speed
( 99 )
$400.35
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$788.02
RideTech 1959-64 Chevy air suspension systems are designed specifically for the Chevy "B" Body cars. These kits provide an ultra-low show stance while maintaining excellent ride quality and handling. Choose the air suspension system recommended for your year/model. Some kits may vary depending on your application. RideTech 1959-64 Chevy air suspension system features and notes: * Upper StrongArms (powdercoated black and fully assembled with ball joints, bushing, and cross shafts; ready for installation) * Lower StrongArms (powdercoated black and fully assembled with ball joints, bushing, and cross shafts; ready for installation) * Front HQ Series Shockwaves utilize an impact forged aluminum body and monotube design to deliver excellent ride quality and handling (also allows fine-tuning of the ride quality and handling) * Front and rear MuscleBars help reduce body roll and create room for wider tires. PosiLink end links provide immediate engagement between the chassis and control arms. * Rear StrongArms provide added strength to help get the power to the pavement * Rear CoolRide and HQ Series shocks simply bolt in place of the stock springs. Important note: Control system is not included. To complete your air suspension system, a RideTech compressor system is recommended. * RideTech kit 11060298 upper arm and panhard bar utilize R-joint technology to provide smooth operation and reduce roll bind; must be used with stock spindles. Some cars have two rear upper control arms and will need an additional StrongArm. (1959-64 GM B-Body includes Impala, Bel Air, Biscayne, Brookwood, El Camino, Kingswood, Nomad, and Parkwood)
Not Yet Reviewed
$4,820.00
Torque converters are considered one of the most mysterious mechanical components in today's vehicles. They function like a clutch and keep the engine running even when the vehicle comes to a halt. By designing the stall speed to match both the engine and desired stall speed, ACC Performance converters help low-end idle speeds, improve performance, and acceleration. ACC Performance Products has emerged as an out-right leader in torque converters and here's why: * Boss Hogs are welded, not furnace-brazed; furnace brazing is not the best way to adhere torque converter components, it will erode and ruin the stators and all rotating parts * Industrial Torrington bearings handle more torque than smaller, uncased needle bearings * Aircraft aluminum washers instead of fiber washers put more horsepower and torque directly to the ground * ACC converters are hand-built and tested to ensure that you get the best converter money can buy * With returns below one percent, you are assured of the highest quality parts available * LS Street Bandit converters are designed to handle as much as 650 hp * Custom-engineered turbine hubs maintain the highest quality, strength, and durability * Stators are built with high-flow vents and channels for greater cooling to handle greater power and higher temperatures * Engineered with a single bolt pattern that makes ACC converters surprisingly light to free up your motor and allow it to gain rpm quicker Notes: * LS Boss Hog Street Bandit torque converters are not designed to handle the extreme shock and abuse of nitrous oxide or trans-brakes * It is imperative that a transmission cooler be added with any torque converter that is rated over stock stall speed
( 10 )
$500.44
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$874.24
ATI torsional input shafts work like a torsional spring bar--twisting and returning to totally eliminate breakage, while reducing shock loads to the gear train. They are manufactured from top-quality 300M or Vasco for maximum durability. Available for GM Powerglide or TH400 splines, these ATI torsional input shafts will add some reliability to your drivetrain.
( 11 )
$189.95
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$881.99
Summit Racing™ intermediate shafts are machined from Vasco 300M steel. This material is exceptionally strong and resilient, allowing these intermediate/main shafts to withstand the most severe torsional shock. You can be confident they will not twist or break under stress--and will handle the power you put to your automatic transmission.
( 4 )
$318.99
ACT race clutch discs are available in three distinct styles--choose the options that best suit your application. Spring-centered discs are the most popular and feature reduced driveline shock and spline wear with quieter operation. Rigid-hub versions offer improved durability but increase gear noise and spline wear. For either of those hub designs, you can choose six pads for better heat management and engagement, or four pads for the quickest shifting. Sintered iron discs offer the highest torque capacity and ultra-high heat capacity. They're designed for cars using clutch-less shifting or drag racing transmissions. Additional product details: * Premium ceramic friction materials provide high-heat tolerance, high coefficient of friction, and low wear rates * Carefully broached splines provide exact fit onto the transmission input shaft for long spline life and better clutch release * Heavy-duty torsional dampening springs are provided in the best sizes and spring rates to help reduce noise * Drive plates are made of high-carbon steel; heat-treated and black zinc coated to resist bending, cracking, fatigue, and rusting * Certified to SFI specifications
( 23 )
$135.99
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$361.00
Inland Empire Driveline super strength bearing supports are manufactured from 7075-T6 aluminum and are designed to withstand the stress of high horsepower drivetrains. They feature a polyurethane cushion that absorbs the shock of high torque acceleration and help to deliver power in a smooth manner under extreme conditions.
( 30 )
$171.77
ATI 300M intermediate shafts are part of the company's extensive line of automatic transmission input shafts. Grade 300M is a high-strength, low alloy steel. Torsional input shafts work like a torsional spring bar, twisting and returning to totally eliminate breakage while reducing shock loads to the geartrain. The intermediate shafts are designed to fit either the Powerglide or TH400 splines. Order the replacement recommended for your application.
Not Yet Reviewed
$269.00
On Sale
Hays Street 650 clutch conversion kits are designed to handle highly modified engines up to 650 hp naturally aspirated (600 hp for forced induction and nitrous combinations). The new 26-spline versions work in conjunction with a modern 5- or 6-speed transmission swap. These are true street/strip clutches for spirited high performance driving or frequent track use. The high performance dual-friction disc utilized in the Street 650 has an upgraded spring hub with heavy-duty damper springs to handle greater shock loads versus a standard damper spring. The disc features a sintered metallic friction surface and an organic friction surface. It does a great job at dissipating heat and fighting the slippage found in ordinary discs, along with providing the smooth engagement characteristics of a street-style clutch. These conversion kits also provide an upgraded heavy-duty pressure plate to round out the performance clutch. The Street 650 is a great choice if you visit the track often. Order the model recommended for your vehicle application. Features and benefits: * Upgraded damper springs deliver up to 30 percent more clamping pressure than stock OE clutch * Dual-friction disc offers the best of both worlds—smooth engagement and excellent holding capacity * All Street 650 clutch kits come complete with pressure plate, disc, throwout bearing, and alignment tool
( 6 )
$1,149.95
$533.95
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$1,399.95
ATI heavy-duty Vasco intermediate shafts are manufactured from Vasco Max C300 steel and available for a variety of transmissions. This material is exceptionally strong and resilient, allowing these intermediate/main shafts to withstand the most severe torsional shock. Some shafts feature a solid design (for center lube transmissions only) with no lube holes to help eliminate premature fractures. Order the ATI heavy-duty Vasco intermediate shafts best suited for your application.
( 3 )
$329.85
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$339.85
Hays Twister Full Race Torque Converters feature a custom-designed anti-balloon plate to stop any converter ballooning and swelling in racing situations. These torque converters are designed for use with a trans-brake and great for power adders such as nitrous, superchargers, and turbos. They're available with various RPM stall speed offerings to accommodate any mixture of modifications—including higher compression ratios, aftermarket camshafts, aftermarket cylinder heads, lower gear ratios, and vehicle weight loss. Additional product features: * All Full Race Series converters are built, tested, and proven to support up to 1,000 hp * Designed to handle the extreme shock and abuse of trans-brakes, nitrous oxide, superchargers, and turbochargers * State-of-the-art spray welding process is used in select areas. Spray welding provides clean, strong, and consistent fusion while also increasing strength through hardening from higher process temperature * Each converter is hand-built and inspected in every step of assembly to ensure top-of-the-line quality * All Hays torque converters are internally welded, compared to brazing. Testing has shown welding provides longer converter life while also enhancing consistency * Heavy-duty Torrington bearings are used for greater strength and durability * Stators are chosen with high-flow vents and channels to promote cooling in heat-producing higher horsepower applications * Increased horsepower and acceleration due to a weight-saving, one-application design. Almost all Hays converters are built for one application to reduce weight, compared to a multi-bolt pattern converter * Full Race Series torque converters are offered in several different stall speeds for popular automatic transmissions.
( 1 )
$899.95
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$1,949.95
RAM Force 10.5 dual disc clutch kits have a strap-driven floater plate and are precision-balanced for quiet operation. The sprung hub top disc absorbs shock and reduces driveline noise. Force clutches are available with your choice of a 300 Series friction disc or a 900 Series disc. The 300 Series organic disc models are capable of handling 500 to 800 hp; while the 900 Series metallic models can handle between 600 and 1,200 hp. These kits use a marcel spring—a thin, wavy device that helps to eliminate the go-or-no-go tendency that similar dual disc clutches have. RAM Force 10.5 dual disc clutch kits include a billet aluminum, SFI-certified flywheel with a steel insert that has sufficient mass to draw heat away from the clutch without distortion. Some kits are available with a steel flywheel. Order the model recommended for your vehicle and engine application.
( 4 )
$1,425.00
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$1,859.00
RAM Pro Street dual disc clutch kits are precision-balanced for smooth operation—and come equipped with a billet cover for optimum release length, a comfortable pedal effort, and a high diaphragm finger position for excellent high-RPM shifting capability. The sprung hub top disc absorbs shock and reduces driveline noise. Pro Street kits are available with your choice of an organic friction disc or a metallic disc. Organic disc models are capable of handling 500 to 800 hp; the metallic disc models can handle between 600 and 1,200 hp. RAM Pro Street dual disc clutch kits include a billet aluminum, SFI-certified flywheel with a steel insert that has sufficient mass to draw heat away from the clutch without distortion. Some kits are available with a steel flywheel. Order the clutch recommended for your vehicle and engine application.
( 1 )
$1,899.00
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$2,199.00
Trail-Gear Creeper axle ball gussets beef up your knuckle balls. Big tires, bumpy terrain, and aggressive driving can take their toll. TG Creeper gusset kits reinforce the knuckle balls to prevent the outer knuckle ends from bending and damaging your solid axle. Kits include unpainted upper gussets with holes for mounting shocks, lower gussets, and steering stop gussets. Knuckle down, not under, to the pressures of rocky trails with the added support and strength of Trail-Gear Creeper axle ball gussets.
( 1 )
$99.99
Dura-Bond automatic transmission bushings are available in a wide range of offerings covering the aftermarket and today's needs for improved quality and tolerances. Individual bushings and kits are available, as well as semi-finished options that allow you to machine bore for proper fit and centerline accuracy. Dura-Bond transmission bushings feature seamless construction that makes installation easy, eliminating breakage and bushing surface interruptions. * Full round Babbitt bushings: Tight tolerances, no walking, no possible split when installing, wall tolerance of .0005 and O.D. tolerance of .001 * Bronze bushings: Hard and strong, long lifespans; resist shock, impact, wear, and corrosion * Coated bushings: Retains transmission engine oil on the surface, even under extreme heat and pressure, providing secondary lubrication in the event of momentary oil starvation * Dry film lubricant coating: Provides solid lubrication of parts subject to torque or contact stresses for maximum fatigue life, improved surface properties, excellent load carrying capacity, and intermittent dry lubrication * Bushings with indents: Provide lubricant reservoirs for better oil retention that allows for excellent and prolonged service * Bushing kits are constructed with all the necessary bushings to complete a rebuild and are manufactured to precise OEM dimensions for an exact fit
( 10 )
$2.50
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$163.99
Ram 300 Series clutch discs feature a polyurethane-encapsulated sprung hub to handle higher shock loading than standard discs. They also have premium, non-asbestos, organic facings bonded to a steel backing for better heat dissipation and greater strength. Available with a flat carrier (300 Series race) or a marcel carrier (300M Series) for reduced chatter and smooth engagement, they work great for race or Hot Street applications.
( 5 )
$107.00
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$369.00
Summit Bucks
Sonnax enhanced performance accumulator springs provide firmer 1-2 shifts for enthusiasts who appreciate quick, positive shift feel in their GM units. The design of these springs provides a performance shift feel, without reducing accumulator piston travel. This allows for a firmer—but still cushioned—shift that minimizes shock to the band and shafts. These springs also may be used as a replacement for THM 350 direct accumulator piston springs. Hit the road enjoying the perfect shift feel with Sonnax enhanced performance accumulator springs.
( 2 )
$12.38
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$25.91
Crown Automotive ring gear bolt kits attach your differential to the carrier. These replacement ring gear bolts will help give you the peace of mind that you did the job right the first time. They are designed to handle the incredible shock loads of a drag racing launch or city driving.
( 5 )
$1.99
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$17.99
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