• 4L60-E
• 4L65-E
• 4L70-E

Tool Kit for 77754-62K.

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• 4T40-E
• 4T45-E

Tool Kit for 33886-02

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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

Tool Kit for 77964-14K.

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• 4L60
• 4L60-E
• 4L65-E
• 4L70-E

The 3-4 accumulator bore on GM 4L60 and 4L60-E series cases can become scored, resulting in the loss of 4th servo feed and 4th accumulator pressure. Scoring is cau...Read More

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

A common goal with GM 4L60-series transmissions is to increase pump volume or output, but a common problem is fluctuating pressure in Reverse. Sonnax pump spring s...Read More

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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

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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• 4L60-E
• 4L65-E
• 4L70-E

Reamer for 77964-04K

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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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• 4L60-E
• 4L65-E
• 4L70-E

Tool Kit for 77754-03K, 77754-04K, 77754-ISO

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• 4L60
• 4L60-E
• 4L65-E
• 4L70-E
• 2nd Gear Servo Release

Technicians would like to find a way to successfully extend the life of 3-4 clutches, and improve the 2-3 shift feel. They have been trying, with limited success, ...Read More

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• 4L60-E
• 4L65-E
• 4L70-E

Reamer for SERV (GM Reman) Valve Bodies

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• 4L60-E
• 4L65-E
• 4L70-E

Reamer for 77754-03K, 77754-04K and 77754-ISO

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• 4L60-E
• 4L65-E
• 4L70-E

Reamer for 77754-ISO, 77754-03K & 77754-04K

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• 4L60
• 4L60-E
• 4L65-E
• 4L70-E

Reamer for 77787-03K.

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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
• 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

In listed GM transmissions, severe wear of the TCC regulator valve bore from the OE valve allows regulated converter apply pressure to exhaust. This is a primary c...Read More

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• 4L60-E
• 4L65-E
• 4L70-E
• 4L80-E
• 4L85-E

Tool kit for 77754-09K, 34200-16K, SC-4L80E and SC-4L60E.

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• 4L60
• 4L60-E
• 4L65-E
• 4L70-E

For 77911-03K 2nd Gear Superhold Servo

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• 4L60
• 4L60-E
• 4L65-E
• 4L70-E
• Does not include input shaft.

Limitations of the GM 4L60 series OE input housing are the root cause of 3-4 burnup in performance applications. The weak OE backing plate’s limited space. Stop th...Read More

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

High-speed steel reamer tool Kit for 77917-06, 77917-07

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• 4T40-E
• 4T45-E
• Fits '95-later

OE does not service the 4T40-E channel plate sleeve as an individual part. In the past it was necessary to purchase a channel plate (case cover) assembly. Sonnax o...Read More

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