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TCC Regulator Valve Kits

Kits include a highly wear-resistant aluminum regulator sleeve to provide full support for the valves.

Anodized aluminum valve has an annular groove for better valve centering within the sleeve. . The isolator valve has been lengthened to operate in unworn portions of the bore, and also has annual grooves to prevent sideloading.
There are two options available: 77754-03K for PWM and non-PWM units, while 77754-04K can be used in these as well as EC3 units.
Wear-resistant aluminum isolator sleeve is available separately.
Reamers allow GM-serviced or remanufactured valve bodies to accept kits.

Sonnax Transmission Parts

Sonnax Transmission Specialty (TS) Parts are not merely direct replacement parts for automatic transmissions. They are improvements on OEM parts-upgrades that are designed by Sonnax engineers. Transmission Specialty prototypes are tested at the Sonnax Technical Center and at associated transmission shops. Testing is extensive and thorough, done on the bench and on the road, before Transmission Specialty Parts are approved and offered for sale. Ideas for Transmission Specialty parts originate primarily with the Sonnax-sponsored TASC Force (Technical Automotive Specialties Committee), a collaborative group of highly skilled and talented transmission experts. Hundreds of Sonnax Transmission Specialty parts are now available, with hundreds more in development. They offer rebuilders practical and cost-effective solutions for a wide range of wear-induced transmission problems

The Cause... Severe wear of the TCC regulator bore allows regulated converter apply pressure to exhaust, while wear at the isolator valve bore reduces TCC apply pressure.

The Sure Cure Sonnax TCC Regulator Valve Kits restore hydraulic integrity to the bore and prevent side loading.

Sonnax Part Summary The OEM valves on 4L60-E units wear the bore, creating pressure leaks that affect performance. The Sonnax TCC regulator valve kits allow you to restore hydraulic integrity without replacing the bore.

Sonnax Detailed Iinformation sheet

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Sonnax Detailed Instruction Sheet Adobe Reader Needed Down load with link on left menu.