Availability
Sonnax case saver retainers are designed for 1999 and later GM 4L80-E units—and are the only intermediate clutch retaining ring case saver that allows the intermediate band to be retained. The case savers fit over the intermediate band anchor lug inside the case and extends rearward to support the intermediate clutch backing plate retaining ring, preventing case lug blow-out. Over the years there have been a variety of case saver designs, however, all required eliminating the intermediate band, as is often done in drag racing trans-brake applications. Only Sonnax case saver retainers support the intermediate clutch retaining ring yet are thin enough to allow the intermediate band to be installed to provide case lug protection in all applications.
( 5 )
$35.60
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$35.99
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 )
$44.43
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$49.46
Get in the right gear with Sonnax shift levers. These replacement levers and kits are designed to work with most competition-type shifters—without modifications to the case. Sonnax offers a choice of one-piece and bolt-together levers; many include O-rings on the shafts to prevent leakage, and all are zinc plated for corrosion protection. Upgrade your stock shifter levers with replacements from Sonnax.
( 14 )
$25.79
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$38.22
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
GM 8L45 and 8L90 transmissions often suffer burnt clutches, shift concerns, low line pressure and/or converter apply complaints—due to excess wear in the signal accumulator piston bores in the control solenoid valve body casting. This wear allows valuable VFS signal pressure to exhaust, preventing proper shift control, line pressure regulation, and/or converter clutch apply. Sonnax drop-in signal accumulator piston kits allow bores to be reconditioned quickly and easily with no reaming required. The hydraulic integrity of the VFS signal pressure circuits are re-established, and future wear prevented with positive sealing and wear-resistant components. Features include: * Hardcoat anodized aluminum piston combats premature wear * Annular grooves to reduce wear rate * Highly wear-resistant sleeve to prevent future wear * Positive sealing O-ringed plug prevents leakage in already worn bores * Mating spring to re-establish OE dampening action * Drop-in Zip Valve parts install quickly and easily * Available for a variety of Chevrolet, GMC, and Cadillac transmission applications Kit contents: -- Sleeves (4) -- Pistons (4) -- Springs (4) -- O-rings (6), 2 extra -- End plugs (4)
( 1 )
$47.48
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
( 1 )
$31.29
Extend the life of your forward clutch and input sprag with the upgrade performance of Sonnax heavy-duty 2-3 shift valves! Your factory valve is limited to applying the overrun clutch only in D3, 3rd gear; whereas these Sonnax valves apply it in D3, 1st, 2nd, and 3rd. This furnishes extra durability to clutch components in plow trucks, heavy-duty vehicles, and in high performance apps. The Sonnax 2-3 shift valves also work well with units operated by aftermarket electronic paddle shifters--allowing for full downshift engine breaking in 2nd gear, while the shifter remains in the D3 position. No special tools are required for installation; it's a transmission overrun clutch component worth exploring!
( 4 )
$41.99
Sonnax TV cable corrector kits are prevent the TV cable from being pulled out of adjustment at full throttle--by allowing the spring to compress and absorb any excessive cable pull. On most GM and Ford transmissions with cables, the throttle valve cable pulls out of adjustment at wide-open throttle. This is typically caused by inaccurate geometry of the throttle shaft lever. There should be a specific degree of movement of the attachment element pivot point between closed and wide-open throttle; and a specific distance between the pivot points of the attachment element and the throttle shaft lever.
( 28 )
$28.60
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$38.17
When standard OE pins just won't do, use Sonnax extra-long Servo pin and seal kits to get the job done right! The Sonnax 4L60/4L60-E servo pin is longer than the longest OE pin. The pins extra length simplifies adjustment, eliminating the need for having to add length to the pin, itself. The Servo pins are made from chromoly steel, so they're durable for high performance applications as well as stock replacement. Dual PTFE seals have been added to improve sealing in the case bore and as well as an O-ring to improve sealing between pin and the 2nd gear Servo. The kits include pin, PTFE seals and an O-ring seal.
( 5 )
$38.16
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 )
$24.99
Bore wear at the compensator feed regulator valve allows critical pressure loss that prevents proper clutch timing and control, resulting in harsh shifts, bind-up, and possibly, burnt clutches. You can recover hydraulic control and renew shift performance by installing a Sonnax compensator feed regulator valve kit. These kits featuring a Sonnax drop-in Zip Valve provide you with valve, spring, sleeve, and retaining clip to restore normal compensator action. Features and benefits: * Hardcoat anodized aluminum valve combats premature wear * Highly wear-resistant aluminum sleeve provides additional valve support * Includes calibrated spring for restoring OE compensator pressure * Drop-in Zip Valve parts install quickly and easily
Not Yet Reviewed
$38.44
Sonnax band adjustment screw kits will prevent band slippage and transmission case breakage. Your OE screws are subject to deflect or bend over time, causing unwanted issues. These screws are made from high-strength, hardened, and tempered alloy steel to prevent problems. They feature stock thread length and are zinc plated to prevent corrosion. Sonnax has a solution to your "weak link"—their strong band adjustment screw kits.
( 1 )
$33.31
Sonnax manual shift shafts help rebuilders use late model cores to rebuild into early model units. Sonnax manual shift shafts contain early model manual shift shafts that retrofit to a late model manual shaft detent lever, allowing the late model case and detent lever to be used in early models. These shafts offer a more economical solution than the OE manual shift shaft and detent lever kit, without the added cost for such additional components as the OE lever, pin, and shaft seal--parts rarely used during the rebuild. The manual shift shaft and fasteners have been yellow zinc plated for corrosion resistance to road salt and other environmental contaminates. The flange face of the nuts is serrated for better holding capacity.
( 5 )
$23.24
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$31.80
Sonnax hydraulic line pressure booster kits contain stronger pressure regulator springs and large ratio boost valves designed to work together, providing progressive pressure increases as driving conditions become more demanding. Their springs are approximately 10 percent stronger than OEM and more conservative in impact than other aftermarket kit springs. Large ratio boost valves provide higher pressure incrementally and when it's needed the most. The combination of these springs and valves in the Sonnax hydraulic line pressure booster kits gives you the best of both worlds--a modest pressure increase at the low-end, with a high-end pressure that's equal to or greater than that of other aftermarket kit springs.
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$31.34
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$43.23
Many Sonnax clutch hubs are designed for the extra-duty requirements of drag racing with Powerglide and other GM transmissions, for instance. Machined from a high-quality medium carbon steel forging, most hubs will accept five friction discs for the added load capacity needed in high horsepower race cars. All splines and thrust surfaces are precision-machined to exacting tolerances, and the unique lube hole pattern is designed to reduce drag on the friction discs in low gear. Sonnax clutch hubs are also available with or without lightening holes to reduce rotational weight.
( 16 )
$32.24
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$47.50
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
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$26.33
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$38.44
Ford vehicles with C6 transmissions often have oil pan leaks. The original Ford C6 oil pans are made with thin-gauge steel. If the oil pan bolts are over-tightened, the flange at the bolt holes will warp and result in a poor gasket seal. Once the oil pan flange is distorted, it's difficult to repair and get a good seal. Sonnax automatic transmission pans are 25 percent thicker than OE, made of heavy gauge material and will resist warping at the bolt holes. The thicker flange will allow the bolts to be tightened enough to compress the gasket evenly and result in a good seal. Sonnax pans will withstand repeated assembly without damage.
( 4 )
$29.79
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 )
$26.42
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$29.86
Sonnax automatic transmission bearing and race kits are designed to allow you to adjust the endplay to your specific transmission's tailshaft housing. The bearings are solidly built to spin smooth as silk. Don't take the chance with the cheaper brands if you want dependability and quality the others only try to attain. Always use Sonnax bearing and race kits in all your rebuilds.
( 1 )
$23.06
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$40.32
Sonnax accumulator piston covers are designed for use in any GM TH350 application. They are machined from billet aluminum to provide a strong, yet lightweight alternative to OEM covers. Their dual O-ring design eliminates leaks and ensures the cover stays in position when used without an accumulator spring.
( 14 )
$36.72
Sonnax throttle valve plunger kits address the poor line rise or no detent downshifts that can be common complaints in vehicles with a stock overdrive transmission. The steel plunger continuously reciprocates within the aluminum sleeve, wearing out the sleeve. This wear (plus the weak OE spring) allows throttle valve feed oil to leak past the plunger and exhaust, resulting in the aforementioned issues that can lead to 3-4 clutch failure. Sonnax throttle valve plunger kits include an improved throttle valve spring designed to properly maintain higher line pressure and improved throttle valve performance. Order the kit recommended for your transmission application. Features and items: * High-quality aluminum sleeve prevents wear * Tight-tolerance sleeve and plunger restore hydraulic integrity * Eliminates the part throttle sleeve orifice * Spring * Sleeve * Plunger
( 2 )
$41.99
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$45.87
Sonnax 3-4 relay O-ringed end plug kits help restore hydraulic integrity at the end plug of your transmission's valve body. In GM 4L60-E, 4L65-E and 4L70-E units, the hammering effect of the 3-4 relay and/or 3-4 shift valves can cause the end plugs to wear, resulting in loss of 4th signal and/or D3 oil. Replace the worn OE end plugs with a Sonnax 3-4 relay O-ringed end plug kit to prevent critical losses and provide a positive seal. Contents: * 5 end plugs (includes 3 extra) * 5 O-rings (includes 3 extra)
( 3 )
$29.25
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
Continuous oscillation in relay valve and sequence valve bore causes wear that prevents proper hydraulic control. You can recover hydraulic control and renew 2nd and 4th gear operation by reconditioning the entire bore and installing a Sonnax oversized 4-3 sequence valve kit. These kits address wear on the inboard two spools that is increasingly more common in aging valve bodies. Wearing at these spools can allow valuable 4th servo feed leakage, resulting in no 4th and 2-4 band wear, and can also allow leakage of 2nd clutch oil needed to apply the 2-4 band in 2nd gear, resulting in poor 2nd gear shifts. Leaking at the OE end plug also allows oil loss that can leave 4th gear inoperable. Sonnax oversized 4-3 sequence valve kits feature hardcoat anodized aluminum valves to combat premature wear and O-ringed end plugs to help prevent 4th gear oil loss. Kit contents: * 3-4 relay valve * 4-3 sequence valve * Spring * End plug * Two O-rings (1 extra)
Not Yet Reviewed
$51.20
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