• 4L60-E
• 4L65-E
• 4L70-E
• For use in '96-later on/ff style 3-2 control valve bodies. It will not work in '93–'95 PWM style 3-2 control valve bodies.

The 3-2 control valve spring in late-model GM 4L60-E, 4L65-E and 4L70-E valve bodies often breaks, and can cause a 3-2 bind and/or 2-4 band to overheat. This sprin...Read More

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• 4L60
• 4L60-E
• 4L65-E
• 4L70-E
• Powerglide
• TH350C
• TH400

Sonnax stator support bushing 35007A allows technicians to service both Sonnax and OE stator support tubes. Use the chart below to determine proper usage as a f...Read More

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• 200-4R
• 4L60
• 4L60-E
• 4L65-E
• 4L70-E

Sonnax enhanced performance accumulator spring 77704S provides firmer 1-2 shifts for the enthusiast that appreciates quick, positive shift feel in listed GM units....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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• 4L60
• 4L60-E
• 4L65-E
• 4L70-E
• May not work in some late-production sun gears with OE finish-in-place bushings.

The Sonnax wide reaction sun gear bushing 77010-01 for listed GM units, is one-and-a-half times the width of the OE version and fills the entire sun gear bushing g...Read More

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• 200-4R
• 3T40 (TH125C)
• 4L60
• 4L60-E
• 4L65-E
• 4L70-E

Steel pump vane manufactured by Koyo® for use in GM 200-4R, 3T40 (125C), 4L60, 4L60-E, 4L65-E, 4L70-E units.

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• 4L60-E
• 4L65-E
• 4L70-E

In GM 4L60-E, 4L65-E abd 4L70-E units, wear at the shift valve spools and bore lands causes loss of critical hydraulic pressure which, depending on the wear locati...Read More

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• 4L60-E
• 4L65-E
• 4L70-E
• Fits two locations

In GM 4L60-E, 4L65-E and 4L70-E units, the hammering effect of the 3-4 relay and/or 3-4 shift valves can cause the end plugs to wear, resulting in loss of 4th sign...Read More

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• 4L60
• 4L60-E
• 4L65-E
• 4L70-E

Reamer for 77787-03K.

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• 4L60
• 4L60-E
• 4L65-E
• 4L70-E

Sonnax replacement seal kit is used to replace worn out or damaged seals in Sonnax kit 77767K.

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• 200-4R
• 4L60
• 4L60-E
• 4L65-E
• 4L70-E

Carbide tool kit for 77917-06 and 77917-07 will provide increased tool life over the standard, high-speed steel reamer tool kit.

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• 4L60-E
• 4L65-E
• 4L70-E

In GM 4L60-E, 4L65-E and 4L70-E units, the AFL valve is a solenoid feed regulator valve that feeds the EPC solenoid and shift solenoids. The OE AFL valve design ha...Read More

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• 200-4R
• 4L60
• 4L60-E
• 4L65-E
• 4L70-E
• 5L40-E
• 5L50-E
• Powerglide

Sonnax bushing 77005T is a direct replacement for the GM 4L60, 4L60-E, 4L65-E, 4L70-E pump bushing and an upgrade for the 5L40-E, 5L50-E and 200-4R. This bushing a...Read More

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• 200-4R
• 4L60
• 4L60-E
• 4L65-E
• 4L70-E

Sonnax now offers a high performance pump slide spring 77722-01K for the 4L60, 4L60-E, 4L65-E and 200-4R. In high performance applications, when engine speed excee...Read More

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• 200-4R
• 4L60
• 4L60-E
• 4L65-E
• 4L70-E
• In 200-4R applications, this kit can only be used in the 3-4 accumulator location.

In listed GM units, it is common to have poor shift quality, burnt bands or clutches due to accumulator piston wear. Repeated reciprocation of the accumulator pist...Read More

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• 4L60-E
• 4L65-E
• 4L70-E

It is common for one of the three plastic retention tabs to break on the wiring harness case pass-through connector in GM 4L60-E, 4L65-E and 4L70-E units. This all...Read More

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• 4L60
• 4L60-E
• 4L65-E
• 4L70-E

For 77911-03K 2nd Gear Superhold Servo

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• 4L60-E
• 4L65-E
• 4L70-E
• 4L80-E
• 4L85-E
• For use with early-style ('92–'02) EPC solenoid in late-style (’03-later) units, solenoid not included.

GM 4L60-E, 4L65-E, 4L70-E, 4L80E-, 4L85-E  transmissions have both early- and late-style EPC solenoids. The early-style (’92-’02) proved to be more reliable than t...Read More

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• 4L60-E
• 4L65-E
• 4L70-E

GM 4L60-E, 4L65-E and 4L70-E transmissions often have trouble shifting into or holding 4th Gear due to excess wear in the sequence valve bore. This wear allows vit...Read More

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• 4L60-E (300mm), Single-Plate Performance Converter
• 4L60-E, 4L65-E, 4L75-E (300mm), Multi-Plate Performance Converter
• 4L80-E, 4L85-E, Multi-Plate Performance Converter

Sonnax pilot GM-PI-21 comes standard in the following 4L60-series Sonnax performance converter kits: GM-RK-405, GM-RK-405WC, GM-RK-408, GM-RK-408WC and GM-RK-17. ...Read More

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• 4L60-E
• 4L65-E
• 4L70-E
• 280mm or 300mm Converter, reluctor style, '04-later.

Sonnax stator support shaft assembly 77918S-09K in GM 4L60-E, 4L65-E and 4L70-E transmissions eliminates sleeve rotation by securing the sleeve in place with Locti...Read More

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