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Since 1978, Sonnax Transmission Company has specialized in the cutting-edge design of top-quality performance and OEM replacement transmission parts. Summit Racing carries...
Since 1978, Sonnax Transmission Company has specialized in the cutting-edge design of top-quality performance and OEM replacement transmission parts. Summit Racing carries a large selection of Sonnax transmission and drivetrain parts, including slip yokes, throttle cable brackets, input drum reinforcement kits, hydraulic line pressure booster kits, and more. Order your Sonnax transmission parts from Summit Racing today!
Since 1978, Sonnax Transmission Company has specialized in the cutting-edge design of top-quality performance and OEM replacement transmission parts. Summit Racing carries a large selection of Sonnax transmission and drivetrain parts, including slip yokes, throttle cable brackets, input drum reinforcement kits, hydraulic line pressure booster kits, and more. Order your Sonnax transmission parts from Summit Racing today!
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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 )
$8.94
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$10.86
Sonnax billet accumulator pistons feature a stronger piston made from anodized billet aluminum with a dual-seal design. OEM plastic accumulators are prone to breaking and have poor sealing qualities and the metal rings currently offered with aftermarket accumulators also have issues with sealing. Sonnax piston's seals prevent piston-to-bore contact and the D-rings vastly improve sealing compared to aftermarket steel rings.
( 8 )
$45.90
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$117.95
Noticing some forward slip and/or delayed engagement with your GM automatic transmission? Sonnax accumulator pistons are direct replacements for OE plastic pistons and restore sealing integrity at the pin bore. The aforementioned issues, as well as burnt clutches and bands can be caused by loss of fluid. Deterioration at older aluminum piston pin bores due to repeated reciprocation and/or cracks in plastic accumulator pistons may be the cause. Avoid a costly valve body replacement by ordering a Sonnax accumulator piston.
( 2 )
$7.91
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$11.82
Maintaining your transmission can save you from costly replacement bills. Sonnax automatic transmission replacement servo pistons feature a dual-seal design and can be used with one or two PTFE or OEM-style cast seals. Accompanying replacement components are also available from Sonnax.
Not Yet Reviewed
$12.24
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$62.58
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 accumulator sleeve kits allow transmission cases to be salvaged. Worn or scored accumulator bores in the case can cause a laundry list of problems, from slipping shifts to a destroyed case. Sonnax sleeve kits are simple drop-in solutions that require no machining to the transmission case. Kits are available for different applications and include sleeve(s), piston, PTFE seals, and/or O-rings.
( 5 )
$88.42
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$119.29
Sonnax 3rd accumulator check ball and seat sets prevent circuit leaks, stop 3-2/2-3 timing issues, and prolongs the life of the 3-4 clutch. Wear or debris can prevent the ball and seat from correctly sealing the 3-4 apply circuit. Sonnax sets will solve the sealing problems for improved performance.
( 4 )
$9.12
Restore proper shift feel with Sonnax accumulator springs. The replacement piston release springs have the identical performance specifications as the purple OE accumulator springs but are made of high-strength material to ensure lasting spring life and reduce spring relaxation. Order the spring set designed for compatibility with your automatic transmission make and type.
( 6 )
$4.62
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$9.90
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
Sonnax accumulator valve train kits have been designed to address specific transmission problems related to accumulator pressure loss or malfunctioning, such as delayed shifts or hard engagement. By ensuring proper accumulator pressure with the precisely designed valve and spring combinations within the kit can improve shift quality and smoothness, help maintain consistent accumulator pressure, and reduce the occurrence of harsh or abrupt shifts, and mitigating the effects of wear on the accumulator components, which can help extend the transmission's lifespan. Order the accumulator valve train kit designed for your specific transmission model.
Not Yet Reviewed
$47.67
Worn or weakened OE accumulator springs may cause delayed or sluggish shifts between 1st and 2nd gears. Installing Sonnax heavy-duty 1-2 accumulator spring kits restore shift feel, even in demanding towing applications. These stronger-than-OE springs improve overall performance, reliability, and longevity of your automatic transmission. Each kit includes an inboard (green) and outboard (yellow) spring.
Not Yet Reviewed
$21.81
Sonnax replacement accumulator seal kits contain five sets of seals to refresh the sealing capabilities of their pin-less accumulator kits. Each accumulator takes one D-ring and one seal. The D-rings are made from Viton® and the seals are PTFE. Improve sealing characteristics with Sonnax replacement accumulator seal kits.
Not Yet Reviewed
$9.78
Ford E4OD and 4R100 transmissions often display shifting irregularities which can be traced to problems with accumulator control valves. Wear ridges form as the valve moves in and out of the bore. Under high-pressure shifts, the valve is allowed to stroke too far, causing it to hang up on these ridges and block oil flow to the associated clutch. This results in soft shifts, loss of gear, and burnt clutches. Sonnax 1-2 and 2-3 accumulator control valve kits resolve these issues and provide a firmer-than-OE shift quality. (The kit fits either of those two locations.) Additional details: * The step machined into valve spool acts as an orifice to allow full oil flow to clutches when appropriate, preventing premature clutch failure * Reinforcement retaining clip attaches to OE clip to prevent over-stroking * Spring shims allow for selective increase of apply pressure to manipulate shift quality * Annular groove helps center valve in bore to prevent future side-load wear * Drop-in Zip Valve parts install quickly and easily
Not Yet Reviewed
$11.09
Sonnax Zip kits are engineered to cure common problems associated with today's automatic transmissions. Sonnax Zip kits eliminate: * Burnt clutches * Line pressure instability * Loss of fuel economy * No line rise * Pressure loss * Shift concerns * TCC apply and release concerns * TCC codes * Pressure switch codes
( 9 )
$125.14
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$220.88
Sonnax bore sizing tools are used to check bore diameters after boring and honing. Each bore sizing tool can be used in conjunction with Sonnax's valve body modification kits. Sonnax precisely machines each bore sizing tool to ensure the tightest tolerances.
( 1 )
$49.99
Summit Bucks
Sonnax universal remanufactured valve bodies have been uniquely designed to fit a variety of '99-later Chrysler applications, regardless of OE checkball or solenoid configuration. The convenience of stocking one SKU number for various applications saves time, money and interchangeability confusion. The channel casting has been resurfaced to SAE recommended flatness and surface finish. The seasoned casting warpage is now eliminated, removing cross-leaks and manufacturing burrs that resulted in clutch distress and shift complaints. A new separator plate is also installed, along with gaskets, to seal the critical surfaces between the valve body and channel casting. Heavy-duty/high performance accumulator pistons with dual-guide seals are installed to prevent piston-to-bore scuffing and restore clutch pressures due to leakage. Patented Sonnax valves are installed to restore hydraulic pressures and eliminate shift complaints, trouble codes, converter concerns and overdrive clutch distress. Their patented accumulator cover plate—made from stronger, thicker material and secured with additional screws—is also installed to prevent flexing or breakage. To guarantee the highest level of operational performance, these remanufactured valve bodies are tested on state-of-the art equipment to verify that pressures match OE specification. Product notes: * One SKU fits all applications, saving time, money and confusion * Resurfaced OE channel casting eliminates warpage, burrs, and cross-leaks cost effectively * New separator plate and gaskets provide critical seal between cast surfaces * Patented Sonnax valves and pistons restore hydraulic integrity of circuits to eliminate shift complaints and clutch distress * Patented Sonnax accumulator cover plate stronger than OE to prevent flexing and breaking
( 1 )
$421.93
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$680.85
Summit Bucks
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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$356.54
Sonnax heavy-duty remanufactured valve bodies are built to overcome chronic shift and converter clutch apply complaints. It provides firmer shifts and a moderately increased pressure curve to improve performance, especially in truck and towing applications. Numerous Sonnax valve upgrades are included to restore hydraulic clearances that lead to shift complaints, clutch distress, converter complaints and codes, solenoid issues and pressure problems. Line pressure rise has been moderately increased to overcome shift complaints, delayed engagements, and to increase holding power to the clutches. To guarantee the highest level of operational performance, this remanufactured valve body is tested on state-of-the art equipment to verify that solenoid feed, clutch, converter, and line pressures match or exceed OE specifications. Choose your preferred kit packaged for your transmission. The valve body includes the following: * Oversized TCC regulator valve and sleeve, and limit valve spring for firmer TCC application * O-ringed bore plugs and abuse plugs * New accumulator control valve and sleeve with spring * Oversized AFL line up * New forward accumulator piston and seal * New pressure switch manifold * New EPC solenoid * New TCC PWM solenoid Kit contents: * Remanufactured valve body * Separator plate * Upper case gasket plate * Lower valve body gasket plate * 1-2, 3-4 accumulator springs * EPC solenoid harness adapter for 2003 to later units * Sonnax line pressure booster kit
( 3 )
$372.32
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$582.46
Summit Bucks
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 )
$100.75
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$176.90
Transmission valve bodies only last so long. When it's time for replacement, you can spend extra green and get new, or buy Sonnax remanufactured valve bodies. To eliminate separator plate cracking or cross-leaking, Sonnax adds a 2-3 accumulator support plate before remanufacturing. Each core's disassembled, cleaned, updated, tested, and parts are replaced as necessary. These direct replacement units are electronically and hydraulically tested and include lockup and shift solenoids. Save some green, while still receiving premium parts, with Sonnax Remanufactured valve bodies.
( 2 )
$349.71
Sonnax reamers include everything you need to modify your transmission valve body. Sonnax makes reamers and kits for almost all of their accumulator pistons and related automotive machining jobs.
( 1 )
$119.99
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$555.99
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
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$45.18
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