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Sonnax internal spline clutch plate GM-CP-1 with one solid HTE friction bonded replaces those in related multi-plate performance converter kits referenced below.
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Thicker cross section, 3-lug mount with three bolt circle options.
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In Ford 6F50/55 and first generation GM 6T70/75 units, AFL/solenoid pressure regulator bore wear results in low pressure at the shift and control solenoid valve as...Read More
Captive clutch failure in the Ford 6R140 is a chronic problem that is difficult to address with stock components or traditional methods. Key OE parts are not avail...Read More
Sonnax shim GM-WS-54 allows turbine-to-impeller clearance adjustments for all Sonnax 258mm/265mm damperless multi-plate performance kits.
Sonnax shim GM-WS-53 allows turbine-to-impeller clearance adjustments for all Sonnax 258mm/265mm damperless multi-plate performance kits.
The ideal upgrade for performance vehicles with GM 6L90 transmissions, Sonnax extreme duty 4-5-6 clutch hub and intermediate shaft 104690-45 guarantees maximum pro...Read More
Sonnax B78 converter bolt is a direct replacement for use in GM rear wheel drive converters with metric threads.
Sonnax heavy duty forward clutch hub 34322-01 is an ideal upgrade over OE hubs in GM TH400, TH425, 4L80-E and 4L85-E applications. It is made from 1045 steel forg...Read More
Sonnax case saver retainer 34762-10 for the GM TH400 and '98-earlier 4L80-E is the only intermediate clutch retaining ring case saver that allows the intermediate ...Read More
In GM 4L80-E and 4L85-E transmissions, the accumulator control valve controls shift firmness by managing accumulator back pressure. Wear at the valve or bore can l...Read More
Case bushing walkout and thrust washer wear are common issues in the GM TH400, 4L80-E and 4L85-E units. Sonnax heavy duty case bushing kit 34006-SPB combines the ...Read More
Sonnax adjustable rear servo pin kit 34912-01K replaces GM TH400 and '95-earlier 4L80-E servo pins. OE pins have seven different lengths to allow for adjustment of...Read More
Sonnax reverse servo spacer kit 34528-01K is a simple, low-cost way to add durability to the GM 4L80-E and 4L85-E transmissions and eliminates the need to retrofit...Read More
Insufficient holding power in the Overdrive roller clutch is the underlying cause of chronic Overdrive roller clutch failure in hardworking 4L80-E and 4L85-E trans...Read More
The OE pressure regulator valve design prevents adequate cooler flow at low RPM and high pressure/demand conditions, which can create overheating. Additionally, in...Read More
