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Wear at the piston pin bore surface can result in poor shift quality and burnt clutches and bands. Sonnax pinless accumulator piston kits prevent pin bore leakage. They're also longer to stabilize the piston and prevent piston cocking. They feature dual seals to stabilize and completely seal the bore, and steel balls to plug the existing pin bore. Fluid loss through the piston pin bore will no longer be an issue when you invest in Sonnax piston kits.
( 17 )
$10.86
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 )
$11.20
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$19.76
Replace your worn-out or damaged pump gears with a set of Sonnax automatic transmission oil pump gears. Their high-quality precision construction meets OEM pump specifications.
( 5 )
$19.98
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 )
$19.91
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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$17.74
Sonnax automatic transmission clutch friction plates limit slipping for smoother shifts. Their selection of red-material frictions is available in several types and thicknesses to meet the needs of your specific rebuild. High performance, heavy-duty friction plates from Sonnax revive the winning performance of your automatic transmission's clutch.
( 1 )
$11.32
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$16.66
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 )
$14.67
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
Sonnax case bushings can mitigate a wide variety of typical OE component issues. These bushings are machined from premium materials, making them required parts in any high-quality transmission build, rebuild, or repair. Whether you're dealing with bushings walking out of the housing bore, spinning out, wearing out, or simply hard-to-find Powerglide versions—there's a Sonnax case bushing available to overcome your specific problem.
( 2 )
$12.01
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.
( 20 )
$12.53
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$19.23
Need to solve your slow-moving servo? Sonnax servo return springs are your answer. Available in several spring rates makes tuning your transmission easier than ever. Made from high quality materials, these springs will provide consistent performance you can trust.
( 3 )
$15.14
Sonnax servo release check valve kits are unique solutions. Since the GM 4L60 (700-R4) and 4L60-E Series transmissions were introduced, they have had inadequate metering of 2nd gear band servo release oil resulting in 3-4 clutch pack failure. The 3-4 clutch pack and 2nd gear band are just not properly synchronized. Sonnax servo release check valve kits combine an orifice with a ball check valve to resolve these issues and successfully extend the life of 3-4 clutches, and improve the 2-3 shift feel. Other benefits: * Provides sufficient exhaust so that 3-2 downshifts are smooth * Calibrates 3-4 clutch feed orifice without creating shift concerns
( 4 )
$10.60
Sonnax sun gear bushings will greatly benefit your automatic transmission rebuild. These high-quality bronze and bi-metal wedding band style components are direct OE replacements that help restore the alignment between the front sun gear and input shaft. Order the bushings designed for fitment with your transmission application.
( 4 )
$10.47
Stripped bellhousing bolts? The cause is usually the loose fit of standard Torx bits, which damage the bellhousing bolts during removal or installation of the bolts. The solution to this problem is Sonnax Torx Plus bits. Specially designed for removing 4L60E bellhousing bolts, Sonnax bits have a tighter fit with the drive head of the bolt, helping to avoid rounding out the bolt head or the bit, and prevent the bit from walking out of the bolt head. Also, these Sonnax tools permit higher torque loads to be applied, which are often needed to remove extra-tight bolts.
( 1 )
$16.99
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
Sonnax anti-wear washer kits prevent metal-to-metal contact. Direct contact between your aluminum Powerglide ring gear and the reverse clutch pack pressure plate causes damage to both components and generates metal debris that circulates throughout the transmission. With the OE design, this is tolerable at original speeds, but is a far greater concern in racing transmissions at higher operational speeds. Sonnax kits include a shim and anti-wear washer that will work with any ring gear that accepts stock-type reverse clutch plates.
( 1 )
$19.37
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
Sonnax Line pressure booster kits allow you to shift aggressively and then feel the tranny grab the clutches with more power when it changes gear. The larger boost valves and matching regulator springs raise line pressure progressively as higher pressure is commanded. These kits modify the sensor signal, which causes the computer to create a pressure increase. They're installed between the pressure sensor and vehicle harness using OE-style sealed connectors; no modifications are needed to the transmission.
( 14 )
$17.12
Sonnax return springs are available in a variety of styles to assist in your automatic transmission rebuild. Replacement part types include high clutch return springs, pump slide springs, detent springs, reverse clutch return springs, and more. They're machined from quality materials for long-lasting performance, and can be ordered individually or in larger quantities. Select the springs required for your specific transmission application.
( 4 )
$10.00
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$17.11
Freshen the seals on your Sonnax pistons to ensure positive sealing and prevent piston contact and bore scuffing. Genuine Sonnax servo piston seal kits give you the extra replacement parts associated with your Sonnax servo pistons. These PTFE seals feature an improved design to conserve pump volume.
( 6 )
$12.61
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$17.16
The Chrysler 46RH/RE, 47RH/RE, 48RE and A727 units used in high performance applications often bend or break the kickdown band strut. To help eliminate these issues, Sonnax offers heavy-duty kickdown band struts—made of solid, heat-treated steel that will not bend or break like other stamped struts. These quality replacements feature an extra-thick cross-section for maximum toughness to withstand the increased intermediate "band" applied forces that are common in high performance applications. Installation is easy: just remove the pan and valve body to expose the bottom of the transmission, loosen the adjusting screw to remove all tension from the band, then remove the original strut and insert your new one with the flat surface facing away from the band. Tighten the adjusting screw to manufacturer specs—and you're good to go!
( 5 )
$19.68
Sticking of bypass components, spring relaxation, or poor ball seat in Ford 4R100 and E4OD units will allow the bypass to open at lower cracking pressure. This reduces TCC (Torque Converter Clutch) apply pressure, cooler flow at the overdrive section, and radiator flow responsible for heat transfer. Sonnax automatic transmission cooler bypass valve kits allow the bypass valve assembly to be rebuilt, salvaging the OE fittings and maintaining cracking pressure at 70 to 75 psi. Features: * Hardened steel T-valve provides secure check ball seat and adequate bypass flow * New spring cracks open at 70 to 75 psi to provide lube if cooler is blocked or restricted * Hardened alloy steel check ball resists damage * Seven new O-rings provide positive seal for cooler circuit * Drop-in Zip Valve parts install quickly and easily Contents: * T-valve * Spring * Check ball * O-rings -- One small -- Two medium -- Two large -- Two extra-large
( 1 )
$16.74
A pump that's been resurfaced or accumulated shaft spline wear creates excessive endplay of the forward and direct drums. This reduces sealing ring, clutch, bearing, and thrust washer life. Having the ability to shim both the lower unit sun gear addresses these problems. Sonnax offers forward clutch hub washers for a variety of transmission applications. Product benefits: * Washers take up the play between the forward clutch hub and the direct clutch housing, allowing front unit endplay to be reduced * Washers also stabilize the direct drum, reducing delayed reverse and improving 2-3 clutch circuit * Allows salvage of valuable hard parts
Not Yet Reviewed
$14.88
Sonnax pressure switch rebuild kits allow you to salvage the expensive transmission electro-hydraulic control module (TEHCM). The required Sonnax installation tool kits make the rebuild quick and easy, seating the laminate discs and setting the seals in place. Contents of each kit: * Laminate installation tool * Seal installer * Piston * Seal plunger
Not Yet Reviewed
$18.99
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