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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 )
$39.30
Summit Bucks
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
Summit Bucks
Sonnax NSS adapter kits allow late-style, 5-wire neutral safety switch cases to be used in early-style, 3-wire vehicles. Chrysler changed the design of its digital neutral safety switch, the result was the case hole was made larger and the late-model Chrysler 42RE, 46RE, and 47RE cases could not be used for applications requiring the early-style neutral safety switch. Sonnax adapter kits screw into late-model cases, and when used with an earlier style valve body manual lever, allows these cases to be used in earlier model vehicles.
( 2 )
$18.15
Summit Bucks
Sonnax slip yokes are forged, not cast, for greater strength, and they undergo a precision-machining process to guarantee exceptional balance and minimal runout. They are 100 percent leak-tested, the seal plug is O.D. ground for superior seal, and yokes are air-tested to 40 psi. Sonnax slip yokes are available in different lengths and tooth counts to fit your specific transmission application.
( 108 )
$205.53
Summit Bucks
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 )
$82.70
Summit Bucks
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 )
$131.84
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 )
$117.08
Summit Bucks
You have a seal leak. The culprit is a cracked OE manual shaft bushing that allows moisture and dirt ingress from the top of the transmission case. The solution is to save the shaft and install a Sonnax shift shaft saver kit. Sonnax's patent-pending shift shaft saver kits replace the OE bushing--without removing and re-welding the shift lever. Since the Sonnax bushing is made from upgraded material, you can be confident of a solid repair, with no risk of comeback. Shift shaft saver kit contents: * Bushing--Delrin® won't absorb atmospheric moisture * Sleeve PTFE * Two O-rings (one extra) * Two retaining clips (one extra)
Not Yet Reviewed
$30.51
Summit Bucks
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
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
Summit Bucks
Based on an ultra-durable, one-piece forging, Sonnax Smart-Tech input shaft and piston kits have a hub with longer front clutch splines. Combining longer splines with a thinner billet aluminum direct piston allows for one extra OE thickness direct friction plate, while keeping original thickness steels, backing plate, original retaining ring and OE clutch clearances.
( 1 )
$1,103.00
Summit Bucks
Sonnax servo piston seals are offered to meet your specific needs and budget. Maybe you don't need a complete seal kit. For those times, Sonnax provides individual items—so you get exactly what you need to service your Powerglide transmission. Sonnax seals deliver a superior, positive seal for renewed no-leak performance.
( 1 )
$10.92
Summit Bucks
Sonnax offers a variety of extreme duty strength output shafts in different spline counts, as well as long and short lengths. All shafts can be purchased separately, with some shafts also available as part of complete extreme planetary assembly kits. These shafts are bolt-on for easy service and designed for use with different gear sets, depending on the application. Order the Sonnax extreme strength output shafts best suited for your application.
Not Yet Reviewed
$847.41
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