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Summit Bucks
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
Summit Bucks
A bad governor will result in a sudden loss of upshift. Sonnax automatic transmission governors will restore proper function on select automatic transmissions. Their governor gears are excellent replacement components and they are made of premium materials to provide a precise fit with OE quality and function for long-lasting performance.
( 20 )
$145.67
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$170.21
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 )
$50.44
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$132.87
Summit Bucks
The OE pressure regulator valve design prevents adequate cooler flow at low rpm and high-pressure conditions, which can create overheating. Additionally, in 1999 and later vehicles, the factory EPC pressure was set high at idle, resulting in engine surge conditions in GM 4L80-E and 4L85-E units. Sonnax lube-regulated pressure regulator valves provide a significant increase in cooler flow under low rpm and high-pressure conditions that benefits all vehicles—and eliminates the need for reprogramming 1999 and later vehicles with high EPC pressure at idle.
( 20 )
$17.40
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$84.84
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
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$410.99
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
These Sonnax billet forward clutch pistons improve forward clutch piston strength and durability by using billet aluminum—and they're made with additional contours at points of high stress. These rebuild components can be used individually or with Sonnax input housing reinforcement sleeve kits. No alterations or fabrication is needed to use them in conjunction with aluminum overrun pistons. Sonnax billet forward clutch pistons can be used in both early and late model automatic transmissions, as noted in the application.
( 1 )
$96.28
Summit Bucks
Sonnax clutch apply piston kits drastically reduce the likelihood of clutch plate distortion. Due to OE design shortcomings, flexing and bowing of the backing plate is common in some GM transmissions, often causing them to suffer failure of the 4-5-6 clutch assembly. These kits increase the piston-to-plate apply ring surface area to strengthen and reinforce the assembly, along with a more rigid backing plate design that outperforms OE and aftermarket components. Sonnax clutch apply piston kits easily tackle these common weaknesses. Kits include: * Apply piston * Apply ring * Piston dam * Backing plate
( 4 )
$162.50
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$218.40
Summit Bucks
Sonnax heavy-duty intermediate overrun clutch outer races eliminate weak points. Race failure is a chronic problem with high-torque loads causing race fractures at two stress points: the radial lube holes and the sharp inside corners at the base of the outer splines. Sonnax outer races are engineered with offset lube holes so rollers never travel directly over the holes, and they are spaced so only one roller is ever positioned near a hole, radically reducing the risk of fracture. Other design improvements to the splines, plus upgraded material and a custom manufacturing process, further improve durability, doubling the torque capacity over any OE or other aftermarket races. Sonnax heavy-duty intermediate overrun clutch outer races are direct replacements offering unrivaled reliability at any power level.
( 3 )
$101.10
Summit Bucks
No one knows transmissions like Sonnax, which is why their primary and secondary pressure sensors work exactly like your OEM parts. Gearbox pressure sensors determine the hydraulic oil pressure in various applications and help to specify the shifting pressure more accurately. This type of sensor may fail to function under hostile conditions or simply wear over time. When that happens, help keep your drivetrain running optimally with the Sonnax primary and secondary pressure sensors designed for your application.
( 2 )
$93.90
TransGo automatic transmission rebuild components are engineered for performance and designed for durability. These kits address nearly every gearbox problem possible through quality that only a legend in the transmission repair industry can provide. Shift that clunky machine into reliability mode with TransGo automatic transmission rebuild components. Order the kit designed to fit your specific model.
( 11 )
$7.71
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$283.00
Summit Bucks
Sonnax thrust bearings are replacements for your worn automatic transmission bearings to aid in smooth operation and noise reduction. The bearings act as a guide to help limit any axial movement which can hinder performance. Manufactured to exceed OE specifications for superior quality even under extreme conditions, order the Sonnax thrust bearings best suited for your application.
( 4 )
$18.47
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$26.42
FTI Performance Powerglide transmission pumps are 7-bolt pumps designed for vehicles with ringed or ringless input shafts. They are high-quality transmission pumps that will easily exceed the quality and performance of your factory pump. For all of your transmission pump needs, FTI Performance has you covered.
( 7 )
$469.00
Summit Bucks
The Sonnax adjustable rear servo pin kit 34912-01K replaces GM TH400 and '95-earlier 4L80-E servo pins. OE pins have seven different lengths to allow for adjustment of the Low/Reverse band—but are no longer available from GM. The Sonnax pin kit has an adjustment range that covers the five longest OE pins to allow for accurate setting of the Low/Reverse servo piston travel. The pin features an O-ring groove to prevent leakage of line pressure past the case pin bore. Kit contents: * Servo Pin * Screw * (4) Small washers * (1) Large washer * (2) O-Rings
( 2 )
$31.29
TransGo Performance offers a variety of automatic transmission rebuild components—including pressure regulator valves for hundreds of applications, such as cars, trucks, and vans from Pontiac, BMW, Chevrolet, GMC, Hummer, Cadillac, Saturn, Oldsmobile, Daewoo, Saab, Isuzu, Buick, Avanti from the 1990s and up. These drop-in replacement valves correct, prevent, and reduce pressure rise shift quality issues. The pressure regulator valves are available individually or in kits with different rebuild parts (see details in Notes). Order the model recommended for your transmission and/or vehicle.
( 1 )
$12.49
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$92.71
Summit Bucks
Sonnax pressure switch rebuild kits can help salvage your transmission electro-hydraulic control module (TEHCM), restore normal switch operation, eliminate codes, and provide renewed shift performance in all ranges. Some GM transmissions send various trouble codes related to internal fluid pressure failures to your TEHCM. These codes may be accompanied by torque converter clutch (TCC) apply problems or shift irregularities such as slipping, flares, harsh application, and bind-ups. Often, the cause is laminated portions of unobtainable OE pressure switches breaching, preventing normal switch operation. Avoid multiple breakdowns that can trigger failsafe mode and TEHCM replacement by ordering the Sonnax pressure switch rebuild kit recommended for your GM transmission.
Not Yet Reviewed
$94.90
ATI offers a wide variety of automatic transmission rebuild components to restore or upgrade the response of your vehicle. Often, just a small part is needed to correct the problem—or maybe you're performing a complete maintenance overhaul. ATI's inventory includes necessities such as shift kits, bands, clutches, gaskets, shims, filters, and more. These components are tailored for fitment on specific transmission types.
( 3 )
$1.99
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$66.90
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
GM 6L45, 6L50, 6L80 and 6L90 automatic transmission units may exhibit multiple line pressure and cooler/converter/lube flow problems due to excess wear in the pressure regulator bore. Deterioration at the balance spool end allows critical fluid loss, resulting in high line pressure, harsh shifts, and overheating due to reduced cooler/converter flow. Wear at the outboard spool robs converter feed pressure and lowers line pressure, resulting in soft shifts and burnt clutches. Installing a Sonnax pressure regulator valve kit restores the hydraulic integrity of these circuits for proper line pressure control in all ranges. A new pressure regulator valve outer spring is also included to replace weakened original springs and provide a modest 5 psi increase across the pressure curve. Additional details: * Hardcoat anodized aluminum valve combats premature wear * Lengthened critical spools operate in non-worn portion of bore for added stability and wear prevention * Annular grooves help center valve in bore to reduce future side-load wear * Drop-in Zip Valve parts install quickly and easily Kit contents: * Valve * Spring * Drill bit .040 in. * 2 checkballs (1 extra)
( 2 )
$13.40
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$62.55
TransGo's fully CNC-machined overdrive pressure plates will allow you to quickly and easily add extra capacity to the overdrive clutch pack. The pressure plates are a direct fit for the OEM drum. Consequently, there is no need for you to spend a small fortune on an aftermarket drum. When using this TransGo pressure plate, you can add two overdrive fricitions for single-sided application and one overdrive friction for double-sided application. For the single-sided friction setup, like in the 68RFE, the new stack up yields a 15 percent increase in surface area. Alternatively, for double-sided friction setup, like in the 545RFE, the end result is a 25 percent increase in surface area. For performance shift options you want, without sacrificing durability, choose TransGo overdrive pressure plates.
Not Yet Reviewed
$110.06
On Sale
Summit Racing™ has the automatic transmission rebuild components you need to return your tranny to optimum performance. From the smallest to the largest pieces, you can rely on Summit Racing™ automatic transmission replacement parts to restore, repair, and renew your transmission.
( 1 )
$79.99
$63.99
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$70.99
Summit Bucks
Sonnax retaining rings are stamped from high-strength, roll-tempered steel, providing additional muscle to resist deflection better than mild steel OE retainers. Successful ET racing requires consistent transbrake release; that usually means utilizing stiffer springs—which leads to the need for stronger spring retainers that won't be deflected. Sonnax no-flex reverse spring retainers are small solutions to faster transbrake response times.
( 3 )
$10.99
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$22.51
Summit Bucks
GM 4L60, 4L60-E, 4L65-E. and 4L70-E input drum assemblies are known to crack where the input shaft is pressed into it (where the overrun clutch rides). Sonnax input drum reinforcement kits include a hardened steel sleeve that reinforces the input drum to prevent this failure. They also include a re-worked overrun piston inner seal, overrun piston, piston outer seal, and piston inner seal. No machining is required to use these kits.
( 2 )
$32.35
Summit Bucks
Sonnax TCC regulator and isolator valve kits assist in recovering hydraulic control and renew TCC performance. Severe wear of the TCC (torque convertor clutch) regulator valve bore, caused by oscillation of the OE valve, allows the regulated converter to apply pressure to your exhaust. This is a primary cause for TCC-related slip code and overheated converters. Exhaust pressure also diminishes line pressure, which can result in burnt clutches. Excess wear at the isolator valve bore reduces TCC apply pressure. Reconditioning the bore and installing a Sonnax TCC regulator and isolator valve kit will restore normal TCC operation by reestablishing the hydraulic integrity of this circuit. Order the kit recommended for your transmission application. Features include: * Sleeve manufactured from highly wear-resistant aluminum * Hard-coat anodized aluminum regulator valve combats premature wear * Isolator valve lengthened to operate in unworn portions of the bore * Annular grooves help center valves in bore to reduce future side-load wear
( 4 )
$18.83
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$32.23
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