• 6L45
• 6L50
• 6L80
• 6L90

GM 6L45, 6L50, 6L80 and 6L90 units may exhibit multiple line pressure and cooler/converter/lube flow problems due to excess wear in the pressure regulator bore. De...Read More

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• 6L45
• 6L50
• 6L80
• 6L90

GM 6L45, 6L50, 6L80 and 6L90 units often suffer from shift abnormalities caused by excess wear in the actuator feed limit (AFL) bore. This wear prevents proper reg...Read More

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• 6L45
• 6L50
• 6L80
• 6L90

GM 6L45, 6L50, 6L80 and 6L90 units may exhibit multiple line pressure and cooler/converter/lube flow problems due to excess wear in the pressure regulator bore. De...Read More

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• 6L45
• 6L50
• 6L80
• 6L90

The primary design function of the OE end plugs is to prevent critical pressure loss by capping the bore; it also performs a secondary function as a spring stop or...Read More

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• 6L45
• 6L50
• 6L80
• 6L90
• Fits any of 3 locations

GM 6L45, 6L50, 6L80 and 6L90 clutch boost valves provide feedback pressure to their respective clutch regulator valves, balancing the regulators to assist with app...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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• 6L80, 6L90 (258mm), Multi-Plate Performance Converter
• 6L80, 6L90 (300mm)
• Street/Strip applications only. For use with GM 258mm early-style stators 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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• 6L80, 6L90 (258mm), Multi-Plate Performance Converter
• 6L80, 6L90 (300mm)
• Street/Strip applications only. For use with GM 258mm early-style stators 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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’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

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’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

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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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• 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
• 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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• 6L45
• 6L50
• 6L80
• 6L90

Tool Kit for 104520-16K and discontinued 104520-07K.

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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

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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• 6L45
• 6L50
• 6L80
• 6L90

Tool Kit for 104740-07K

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• 6L45
• 6L50
• 6L80
• 6L90

Tool Kit for 104520-11

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• 6L45
• 6L50
• 6L80
• 6L90

Tool Kit for 104740-01

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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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