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Summit Racing™ Corvette-style servo piston kits allow you to swap out your OEM servo on your 700R4 or 4L60E/4L65E automatic transmission and improve shift quality and firmness. They have a larger piston area which increases band-apply pressure and holding power. These kits are drop-in upgrades and will really firm up the 1-2 shift. Includes both pistons and all necessary O-rings.
( 17 )
$20.99
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$77.99
Summit Bucks
Sonnax externally adjustable low/reverse servo kits make band maintenance quick and easy. They offer an ideal way to improve reliability and make staging more consistent and predictable. Checking L/R band adjustment after repeated use is good practice. Unfortunately, OE servos with steel covers are difficult to adjust in a vehicle, so a quick check with such a servo installed is impractical for most racers. Sonnax externally adjustable servos provides an improved design that makes checks and adjustment of the L/R servo easy. There is no cover or access plug to remove because the adjuster itself extends through the cover. A quick check is done simply by pushing on the end of the adjuster and observing the movement of the piston relative to the servo cover. Select the kit designed for your transmission. Features: * Quickly check and adjust the low/reverse band to prevent trans-brake malfunction * Unique servo cover and adjuster design makes in-vehicle band service easy * Works with or without OE 1-2 accumulator piston Included: * 6061 Anodized billet aluminum cover * Piston * Pin * Jam nut * Cover seals -- Two PTFE, one extra * Piston seal * Cover O-ring * Pin O-ring Kit for TH400 will also include: * Cover flange O-ring * Bolts (6) * Washers (6)
Not Yet Reviewed
$353.26
Summit Bucks
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 )
$91.85
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$292.41
Summit Bucks
If you're looking for an easy upgrade to your automatic transmission, Sonnax Servo piston kits may be the answer. The improvement in shift quality is an immediate and noticeable value. These direct replacement kits will help to eliminate a bit of a "sloppy" gear performance caused by faulty OEM servo units. With all necessary rings and seals to prevent leakage and handle higher pressure, Sonnax servo pistons can be your link to greater band apply force. Choose the kit that matches your vehicle specs, then expect faster and firmer shifts!
( 30 )
$15.14
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$352.46
Summit Bucks
Sonnax C ratio servo kits offer greater holding power, giving cleaner, firmer 1-2 and 2-3 shifts. They are machined from 6061 aluminum billet and feature lip seals on the piston for superior sealing over a wide range of fluid pressure. The C ratio servos are the largest in the C4 family, and will work equally well in performance C5 applications. The pins incorporate two PTFE sealing rings to insure the hydraulic integrity of the pins in worn cases. Experience firmer shifts with Sonnax C ratio servo kits. Kits include: * Piston * Cover with either purple anodized or machined finish * Servo pin with seal grooves * Gasket * Retaining ring * Spring * PTFE seals * Large and small lip seals
( 1 )
$224.07
A must for any performance-oriented transmission, these high performance servo kits from TransGo are designed to deliver more band force for longer life and better operation. They include a new servo piston assembly to replace the standard stock unit.
( 22 )
$28.43
On Sale
FTI Performance offers billet servo kits to maintain your GM Powerglide automatic transmission. These kits contain assorted components, such as dual ring servo; PTFE servo rings; servo cover, gasket and O-ring; and all hardware.
( 2 )
$65.99
$59.39
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
These Sonnax 2nd Gear Corvette ratio servo kits provide increased apply area resulting in improved holding power for firmer 1-2 and 3-4 shifts in 4L60 (700-R4) and 4L60-E transmissions. The servo piston features D-rings in place of the OE seal rings for improved sealing during apply and release. They are compatible with Sonnax 4th Gear Super Hold dual servo kits. Sonnax 2nd Gear Corvette ratio servo kits include: * Piston * 2 Piston D-Rings * Housing * Housing O-Ring
( 2 )
$57.53
Summit Bucks
Sonnax master servo piston kits replace your piston and cover with no modifications needed to the case. These direct-fit kits are stronger to handle higher pressure and feature a no-leak, dual O-ring billet aluminum servo for superior sealing.
Not Yet Reviewed
$78.74
TCI high performance servo kits eliminate fluid loss under harsh driving conditions. A must for any performance-oriented transmission, these servo kits from TCI are designed to deliver more band force for longer life and better operation. Other features include a billet aluminum servo cover that eliminates fluid loss under hard-driving conditions, a premium mounting gasket, and mounting hardware.
( 13 )
$98.95
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$309.95
On Sale
RevMax billet servos are a must-have component for all high performance applications! The stock servo is notorious for cocking in the bore and causing the low and reverse band to bind and not release properly. The RevMax billet servo is guaranteed never to stick and cause this issue, and also provides great sealing capabilities by adding a second sealing ring.
Not Yet Reviewed
$59.00
$56.05
Summit Bucks
In GM TH350 and TH350C units, the intermediate servo bore becomes scored from repeated cycling. The spring side of the piston has line pressure present in R, N, D. Excess leakage at the servo piston results in low line pressure and delayed engagements. During forward speeds, oil loss affects shift quality and reduces clutch life. To salvage cases, install a Sonnax intermediate servo sleeve kit (35709-01K). * Contains an aluminum sleeve and a replacement piston with a PTFE seal * Drop-in solution requires no machining of the transmission case * Contents: Sleeve, servo piston, and Seal PTFE
Not Yet Reviewed
$29.63
For greater durability and more consistent performance from your GM Powerglide transmissions, TCI brings you these dual ring servo kits. The kits use two stock PTFE sealing rings in place of the original design, which uses only one. This doubles their sealing effectiveness and prevents the excessive leakage that could otherwise reduce band force. Perfect for drag race vehicles seeking positive trans-brake engagement when staging, these servo kits reduce vehicle rocking and increase stability in lower gears.
( 1 )
$61.95
GearStar Pro Shift servo and piston kits provide positive shifts, while increasing the clutch and band life and eliminating warpage. Highlighted by their billet aluminum construction, the GearStar Performance Transmission logo is laser-etched, and seals, O-ring, and gasket are included. Eliminate slippage between gears and/or gear flares with GearStar Pro Shift kits.
Not Yet Reviewed
$205.00
If you're one of the millions of GM drivers with 700R4 or 4L60E/4L65E automatic transmissions that experience sluggish shifts, especially into second gear, you should consider swapping out your OEM servo for an ATI servo piston kit. Their piston kits are CNC-machined from 6061 T6 aluminum and are an easy upgrade. Don't be fooled by other servo assemblies that are nothing more than cleaned up OEM parts—ATI Performance Products has been producing quality performance-enhancing internal transmission components for decades.
( 3 )
$21.10
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