• 6L80
• 6L90

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

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’10-Later

Sonnax remanufactured valve body GM6L80L has been designed to address common issues, such as: burnt clutches; codes P0751, P0741, P0742; harsh TCC apply; bump, har...Read More

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’06–’09

Sonnax remanufactured valve body GM6L80E has been designed to address common issues, such as: burnt clutches; codes P0751, P0741, P0742; harsh TCC apply; bump, har...Read More

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• 6L80, 6L90 (300mm)
• 6L80, 6L90 (300mm), Multi-Plate Performance Converter
• For street/strip and towing applications.

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

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• 6L80
• 6L90
• Powerglide

Featuring BorgWarner high-energy material, Sonnax clutch friction 104120-03 is grooved to disperse oil through the clutch pack for improved cooling. It is an ideal...Read More

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• 6L80
• 6L90
• Wide, for use with Powerglide-style, 45-tooth frictions.

Sonnax 4-5-6 clutch steel 104120-01 is a high-quality, Lindure® processed steel with a wider friction surface than OE clutches for GM 6L80/90 transmissions. Use wi...Read More

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• 6L80
• 6L90
• Wide, for use with Powerglide-style, 45-tooth frictions.

Sonnax 4-5-6 clutch steel 104120-02 is a high-quality Lindure® processed steel with wider friction surface than OE clutches for GM 6L80/90 transmissions. Use with ...Read More

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• 6L80, 6L90 (300mm)

Sonnax piston/damper assembly rivet GM-RV-11 is for use in GM 6L80, 6L90 (300mm) converters. Each rebuild requires six rivets.

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• 6L80 (258mm)
• 8L90

Sonnax piston seal GM-O-22 is a direct replacement for worn or damaged seals in GM 6L80 (258mm) and 8L90 converters.

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• 245mm LU (3T40, 3L30, TH200C, 4T60-E, 4L60 & E:S-10 only)
• 6L80, 6L90 (300mm)
• Converts GM 245mm LU (3T40, 3L30, TH200C, 4T60-E, 4L60 & E:S-10 only) converter cores to a 36-tooth spline for use in 6L80, 6L90 300mm applications

Sonnax special high performance inner stator race GM-HR-18 can be used to convert  GM 245mm LU (3T40, 3L30, TH200C, 4T60-E, 4L60 & E: S-10 only) applications t...Read More

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• 6L80
• 6L90

OE bushings in GM 6L80 and 6L90 transmissions have a tendency to wear out prematurely due to sub-optimal material composition. This wear can lead to bushing failur...Read More

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• 6L80
• Use with OE-style, 36-tooth frictions & OE steels.

An essential upgrade for any hard-working GM 6L80 transmission, Sonnax heavy duty 4-5-6 clutch hub and intermediate shaft 104680-36 guarantees maximum protection a...Read More

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• 6L80
• Use with Powerglide-style, 45-tooth frictions, Sonnax steels & high capacity piston kit 104960-20K.

The ideal upgrade for performance vehicles with the GM 6L80 transmission, Sonnax extreme duty 4-5-6 clutch hub and intermediate shaft 104680-45 guarantees maximum ...Read More

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• 6L80 (245mm), Single-Plate Performance Converter
• 6L80, 6L90 (300mm)

The GM 6L80 transmission in '10-later Camaros and many GM trucks uses a 300mm converter. The large diameter and weight of this "JBMX" converter rob the drivetrain ...Read More

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• 6L80
• 6L90

GM 6L80 and 6L90 transmissions have aluminum bushings installed at the front and rear of the stator shaft. While aluminum bushings generally have good wear charact...Read More

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• 6L45
• 6L50
• 6L80
• 6L90

Quality replacement Sonnax pump vanes 76742 available for rebuilding GM 6L45, 6L50, 6L80 and 6L90 pump rotors. Cost-effective alternative to replacing entire pump rotor assembly

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• 6L80, 6L90 (300mm)

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

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• 6L45
• 6L50
• 6L80
• 6L90
• Fits mid '10–earlier. Compatible with all models except early, 1st design 6L80 plate 24246916.

Mid 2010-earlier GM 6L45/50/80/90 transmissions have a tendency to set a P0751 (shift solenoid 1 malfunction) code. One of the causes of this is the OE spring forc...Read More

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• 6L45
• 6L50
• 6L80
• 6L90

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

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• 6L80, 6L90 (300mm)
• 6L90 (Captive Clutch)

Sonnax flanged impeller hub GM-90-72G fits GM 6L80 (late), 6L90, 300mm converters. The hub has a large, reinforced flange and a recessed pocket to contain associated thrust bearing GM-N-22.

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• 6L45
• 6L50
• 6L80
• 6L90

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

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• 6L80, 6L90 (300mm)
• 6L90 (Captive Clutch)

Sonnax inner stator race GM-HR-16 is a direct replacement for damaged stator races in GM 6L80, 6L90 (300mm) converters. GM-HR-16 is made from through-hardened 5210...Read More

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• 6L80, 6L90 (265mm), Multi-Plate Performance Converter
• 6L80, 6L90 (300mm)
• Street/Strip applications only.

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

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