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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 )
$166.99
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Sonnax Sure Cure automatic transmission rebuild kits are a comprehensive reconditioning package—featuring the best Sonnax products developed to help mechanics restore and enhance transmission performance. Sure Cure components are the same Sonnax parts sold individually to resolve common valve body complaints, as well as other transmission problems. The high-quality components in each Sure Cure kit will repair worn areas and protect the transmission against future damage. Plus, each kit comes with an easy-to-read, step-by-step installation guide that covers inspection and repair of the most critical areas of the valve body. Additional features and benefits: * Restore shift quality and reduce comebacks * Repairs biggest trouble areas to reduce comebacks * Includes step-by-step instructions for comprehensive valve/pump body restoration Kits Include: * Shims (2) endplay * Pump slide pivot pin * Throttle valve plunger valve kit * Shortened TV link * TV cable corrector kit * Seals D-ring servo * 1-2 or 3-4 accumulator spring * Servo release check valve kit * Reverse boost valve kit * Oversized pressure regulator valve * Pinless 1-2 or 3-4 accumulator piston kit * TV boost valve kit * Bushing pump * Bushing rear stator support * Checkballs
( 6 )
$176.90
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Sonnax SmartShell heavy-duty reaction shell kits prevent damage to the rear planetary assembly, as well as providing a reinforced shell. Stripped or cracked shells in GM 4L60, 4L60-E, 4L65-E and 4L70-E units are a common problem, but strengthening the shell alone does nothing to address the equally common problem of preventing thrust loads from overwhelming rear captured planetery bearings. From daily jobs to extreme builds, the Sonnax SmartShell heavy-duty reaction shell kits are the only way to prevent shell failure and protect the bearing.
( 21 )
$124.62
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Sonnax heavy-duty reaction shaft kits are universal to fit all years and all input carriers. Reaction shafts used in high-torque applications, and especially in heavy vehicles, suffer from two common issues that require replacement. The splines that engage the rear planet can twist and the splines that engage the ring gear wear. OE and other aftermarket versions are made from lower strength, plain carbon steel. Sonnax heavy-duty reaction shaft kits are made from high-strength chromoly steel alloy to eliminate spline twist and spline wear. Contents include: * Reaction shaft with bushings * Reaction shaft-to-shell bearing * Reaction shaft-to-front carrier bearing * Shim
( 5 )
$217.22
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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 )
$119.10
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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 )
$256.95
Summit Bucks
GM 6L80 and 6L90 transmissions often suffer failure of the 4-5-6 clutch assembly due to flexing and bowing of the backing plate (coning)—especially when your clutch-apply pressures exceed OE specifications. Sonnax clutch backing plates are designed to minimize flexing/bowing when the clutch is applied, drastically reducing the likelihood of clutch plate distortion. Their stiffer backing plate design outperforms OE and aftermarket plates.
( 8 )
$132.87
Summit Bucks
Input housing failure at the shaft and forward piston areas is common in high-torque 4L60, 4L60-E, 4L65-E, and 4L70-E transmissions. Also, the input drum assembly is known to crack and strip out splines where the input shaft is pressed into it (where the overrun piston rides). Sonnax input housing sleeve kits—forward sleeve kits and overrun sleeve kits—when used in combination with each other, greatly increase the maximum strength of the housing for additional torque capacity and can prevent these failures. Sonnax input housing overrun and forward sleeve kits are offered separately. Both sleeves feature high-strength, chromoly construction that increases housing torque capacity by protecting the shaft and either the forward piston or overrun piston areas. Each kit will include piston, reinforcement sleeve, and outer and inner piston seal.
( 2 )
$139.99
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$229.75
Summit Bucks
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
Summit Bucks
ACDelco automatic transmission tailhousings fit your vehicle to deliver the same OE performance, durability, and service life as their original counterparts. They provide factory form for an easier install and a repair that stays on budget. Each of these transmission case rear extensions includes the correct seal for a tight connection. Dozens of models are available for vehicles from the 1990s and up. Order the tailhousing recommended for your application.
( 12 )
$105.99
Summit Bucks
Sonnax Smart-Tech clutch kits contain BorgWarner High-Energy friction plates and Lindered steel clutch plate. These patented 3-4 clutch upgrades make room for a taller clutch pack, allowing one additional OE thickness friction and steel plate. Recommended for use with Sonnax Smart-Tech input housings, the combination (housing and Smart-Tech clutch kit) is the best way to optimize clutch capacity and guard against burnup in GM 4L60, 4L60-E, 4L65-E and 4L70-E transmissions.
Not Yet Reviewed
$121.79
Summit Bucks
With its .63 ratio, these Sonnax 2nd gear servo kits are an ideal option when upgrading GM 4L60-E and 4L65-E applications to improve shift feel without risk of harsh 1-2 shifts. They improve 4L60-E and 4L65-E shift feel and durability without harshness. D-Rings used in place of seal rings enhance sealing during apply and release. Sonnax 2nd gear servo kits include: * Piston * Housing * Piston D-Ring small * Piston D-Ring large * Housing O-Ring
Not Yet Reviewed
$150.39
Summit Bucks
Sonnax TCC valve reamers are designed to help you repair and recondition your automatic transmission torque converter clutch (TCC). They offer models specifically designed for non- and remanufactured, as well as non- and PWM valve bodies. Order the Sonnax TCC valve reamer(s) designed to fit your application.
( 1 )
$119.99
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 )
$247.99
Summit Bucks
Is your shifter cable worn or damaged? ACDelco GM Genuine Parts shifter cables provide reliable shifting performance. Manufactured from top-quality materials, these shifter cables fit your stock shifter assembly and install in the stock location. They are a GM recommended replacement for your vehicle's original component and are manufactured to offer you the same performance, durability, and service life you expect from General Motors.
( 36 )
$102.99
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$140.99
Summit Bucks
ACDelco GM Genuine Parts transfer case adapters are manufactured to be an exact replacement for your vehicle. They are GM original equipment replacements, meaning you can rest assured of premium quality, as well as peace of mind that the fit, form, and function meet their high standards and yours.
( 1 )
$118.99
Summit Bucks
The factory-original fit and lasting function of ACDelco Gm Genuine Parts automatic transmission pans provide a perfect repair without breaking your budget. They are designed, engineered, and tested to rigorous standards, and are backed by General Motors. Features: * Built with premium materials for prolonged service * Precisely engineered to OE specifications * Trouble-free installation and function ensured by rigorous testing procedures * Designed for direct compatibility
( 14 )
$113.99
Summit Bucks
Sonnax clutch apply plate and seal service kits include replacement components for Smart-Tech input housing kits 77733-06KA, 77733-10KB, 77733-11KB, 77733-12KB and out-of-production kits 77733-06K, 77733-10K/KA, 77733-11K/KA, 77733-12K/KA. Kit contents: * Socket head cap screws (15) * 3-4 clutch retaining ring * 3-4 clutch apply plate * 3-4 clutch return springs (10) * Forward piston outer seal * Forward piston inner seal * Overrun piston outer seal * Overrun piston inner seal
Not Yet Reviewed
$132.29
Summit Bucks
ACDelco GM Genuine Parts ignition lock housings are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These true OE parts will provide the same performance, durability, and service life you expect from General Motors. Whether you drive a Chevrolet, Buick, GMC, or Cadillac, ACDelco's, GM Genuine Parts line are made just for you.
Not Yet Reviewed
$130.99
Summit Bucks
Sonnax regulator valve reamers provide a consistent bore finish where quality is essential. For the professional and amateur alike, these high-speed steel reamer tool kits include drill jig and reamer.
( 2 )
$179.99
Summit Bucks
The Sonnax forward piston installation tool is used in place of GM Kent-Moore J-29883 for applications which have an input drum reinforcement sleeve installed. This tool is made of durable high performance plastic and protects the forward piston inner seal during piston installation.
Not Yet Reviewed
$197.60
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