• 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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• 4L60-E
• 4L65-E
• 4L70-E

The end plug at the AFL (actuator feed limit) valve is often lost or damaged during valve body inspection or service. Sonnax offers direct replacement end plug 77754-39 for this location.

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• 4L60-E
• 4L65-E
• 4L70-E

Sonnax vacuum test plate kit seal 77754-VTP-S is a replacement silicone seal for a worn or damaged original seal in vacuum test plate kit 77754-VTP.

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• 4L60-E
• 4L65-E
• 4L70-E

Tool Kit for 77754-58K

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• 4L60-E
• 4L65-E
• 4L70-E

Sonnax now offers a specially designed Torx® Plus bit 77000-HBK for removing 4L60-E bell housing bolts. The bit has a tighter fit with the drive head of the bolt. ...Read More

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• 4L60
• 4L60-E
• 4L65-E
• 4L70-E

Sonnax apply plate and seal service kit 77733-06SVC includes replacement components for Smart-Tech® input housing kits 77733-06KA, 77733-10KB, 77733-11KB, 77733-12...Read More

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• 4L60
• 4L60-E
• 4L65-E
• 4L70-E

Sonnax forward piston installation tool 77764-INSTL is used in place of GM Kent-Moore J-29883 for applications which have an input drum reinforcement sleeve instal...Read More

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• 4L60
• 4L60-E
• 4L65-E
• 4L70-E

Wear or debris can prevent the third accumulator checkball and seat from correctly sealing the 3-4 apply circuit.  Installing Sonnax 3rd accumulator checkball and ...Read More

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• 4L60
• 4L60-E
• 4L65-E
• 4L70-E
• Press in

Metal-clad Viton® seal restores hydraulic integrity at a worn 2nd apply servo piston.

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• 4L60
• 4L60-E
• 4L65-E
• 4L70-E

Sonnax offers accumulator spring 74926 for use in the 1-2 or 3-4 accumulator of GM 4L60 and 4L60-E series transmissions. The Sonnax spring has identical performanc...Read More

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• 4L60
• 4L60-E
• 4L65-E
• 4L70-E
• Wider than OE

Sonnax rear stator support tube bushing 77002B allows technicians to service both Sonnax and OE stator support shafts. The wider bushing provides more support than OE.

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

This kit contains five sets of seals to refresh the sealing capabilities of Sonnax pinless accumulator kit 77998-03K. Each accumulator takes one D-ring and one seal.

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

Vehicles with 4L60 & E and THM 200-4R transmissions can have low or high line pressure due to a worn pump slide pivot pin. Decreased oil pressure meant to main...Read More

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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
• 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 fron...Read More

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• 4T60-E
• Fits '93-later units.

Common complaints with '93-later GM 4T60-E units are falling out of lockup hot, codes 39, 740 and 1870, adverse lockup in cold weather, torque converter shudder an...Read More

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