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Sonnax front cover GM-CC-13 is a fully machined forging for use in GM 6L80/6L90 converters. Made from high-quality SAE 1026 steel, the strength of this cover is im...Read More
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Vehicles with listed GM transmissions may exhibit insufficient line rise in drive ranges, soft shifts and/or burnt clutches. These problems may be caused by contin...Read More
Sonnax damper rivets GM-RV-13 are for use exclusively with Sonnax piston plate GM-DA-17P and related performance converter kits to replace weak or failed plates in...Read More
Vehicles with listed GM transmissions may have a number of TCC apply problems. Bore wear at the TCC regulator valve can cause no TCC apply or slipping on engagemen...Read More
Listed GM 6-speed transmissions often set various trouble codes related to failures of fluid pressure switches that are internal to the transmission electro-hydrau...Read More
Sonnax hydraulic line pressure booster kits contain stronger pressure regulator springs and large ratio boost valves designed to work together to provide progressi...Read More
Sonnax external spline clutch plate GM-CP-9 with one woven carbon friction bonded replaces the plate in related multi-plate performance converter kits referenced below.
Sonnax internal spline clutch plate GM-CP-8 with dual-sided woven carbon frictions bonded replaces the plate in related multi-plate performance converter kits referenced below.
Salvage the expensive TEHCM in listed GM 6-speed transmissions by replacing lost or damaged pistons with a direct replacement Sonnax pressure switch plastic piston...Read More
Sonnax TCC Zip Kit 8L45-8L90-TCC-ZIP targets the root cause of multiple converter-related complaints by sealing the critical circuit pressure losses in the GM 8L45...Read More
Sonnax shift Zip Kit 8L45-8L90-SHIFT-ZIP targets the root cause of mulitple shift-related complaints by sealing the critical circuit pressure losses in the GM 8L45...Read More
’06–’09 GM
Sonnax remanufactured valve body GM6L90E has been designed to address common issues, such as: burnt clutches; codes P0751, P0741, P0742; harsh TCC apply; bump, har...Read More
’10-Later GM
Sonnax remanufactured valve body GM6L90L has been designed to address common issues, such as: burnt clutches; codes P0751, P0741, P0742; harsh TCC apply; bump, har...Read More
GM 6L90 (Captive Clutch) torque converters are a nuisance to rebuild. In these converters, the piston is held onto the cover by leaf springs and rivets that are di...Read More
Sonnax solid piston seal GM-O-16 replaces worn or damaged seals in GM 6L90 captive clutch converters
GM 6L80 and 6L90 transmissions often suffer failure of the 4-5-6 clutch assembly due to flexing and bowing of the backing plate (coning), especially when clutch ap...Read More
A performance torque converter is highly specialized based on the performance characteristics of the specific vehicle. Sonnax has several levels of kits to ensure ...Read More
GM 6L80 and 6L90 gas-powered applications that use a full-size torque converter often have engine modifications for increased output, towing heavy loads, or both, ...Read More
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
An essential upgrade for any hard-working GM 6L90 transmission, Sonnax heavy duty 4-5-6 clutch hub and intermediate shaft 104690-36 guarantees maximum protection a...Read More
The rubber seals between the center support in the case and the machined surface of the valve body are prone to leakage over time. In GM 6L45, 6L50, 6L80, 6L90 tra...Read More
The outermost spring retainer plate in GM 6L80, 6L90 (300mm) damper assemblies often cracks and fails. The OE material and stamping process create an inherent weak...Read More
GM 6L45, 6L50, 6L80, 6L90 units may have TCC apply and release problems. Bore wear or a stuck converter feed limit valve can result in converter overheat, incorrec...Read More
