• 4L60-E
• 4L65-E
• 4L70-E
• Use with OE valve/bore only, addresses wear at inboard two spools & other locations.

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 v...Read More

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• 298mm LU (TH250C, TH350C, 200-4R, 4L60 & E)

Sonnax stator cap GM-WP3-OE is a taller version of Sonnax stator cap GM-WP10-OE. GM-WP3-OE is .030" taller, allowing the turbine hub to be re-surfaced multiple tim...Read More

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• 298mm LU (TH250C, TH350C, 200-4R, 4L60 & E)

Blue

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• 4L60-E
• 4L65-E
• 4L70-E
• Fits '07-later units.

Sonnax front planet to reaction shaft thrust bearing 74238-01 is an OE replacement for GM 4L60-E, 4L65-E and 4L70-E units.

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• 298mm LU (TH250C, TH350C, 200-4R, 4L60 & E)

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• 4L60-E
• 4L65-E
• 4L70-E
• Fits 5-pinion front planetary.

Sonnax PTFE-coated batwing washer 74582-01K is a direct replacement for worn or damaged OE washers in GM 4L60-E, 4L65-E and 4L70-E transmissions.

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• 4L60-E
• 4L65-E
• 4L70-E
• Fits 4WD/AWD applications only.

Output shaft failure is common as power levels are increased in GM 4L60-E, 4L65-E and 4L70-E units. Sonnax heavy duty output shaft 74678S-HD for 4WD/AWD units is  ...Read More

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• 4L60-E
• 4L65-E
• 4L70-E
• Fits '99-later

Sonnax captured front planetary bearing 77747-01 is a high-quality, direct replacement for the .199" thick, silver- and black-colored bearing found in '99-later GM...Read More

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• 4L60-E
• 4L65-E
• 4L70-E
• Fits 2WD and Corvette applications only.

Output shaft failure is common as power levels are increased in GM 4L60-E, 4L65-E and 4L70-E units. Sonnax heavy duty output shaft 74678L-HD for 2WD and Corvette u...Read More

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• 298mm LU (TH250C, TH350C, 200-4R, 4L60 & E)

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• 300mm (4L60-E)

Sonnax shim GM-WS-55 is a drop-in addition to make up material removed when resurfacing the reactive surface of the front cover and/or when material is removed fro...Read More

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• 4L60-E
• 4L65-E
• 4L70-E
• For units with 300mm converter, reluctor-style 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 flexes during clutch app...Read More

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• 4L60-E
• 4L65-E
• 4L70-E
• For units with 300mm converter, non-reluctor style 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 flexes during clutch app...Read More

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• 4L60-E (298mm), Single-Plate Performance Converter

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• 4L60-E
• 4L65-E
• 4L70-E

In GM 4L60-E, 4L65-E and 4L70-E units, it is common for the plastic Forward accumulator piston to wear or crack and older aluminum piston bores to wear from repeat...Read More

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• 298mm LU (TH250C, TH350C, 200-4R, 4L60 & E)
• 4R100
• 5R110W, 6-Stud

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• 298mm LU (TH250C, TH350C, 200-4R, 4L60 & E)
• 4R100
• 5R110W, 6-Stud

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

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• 722.4 (W4A-020)
• ZF4HP18
• ZF4HP24
• ZF5HP19 (Single Friction)
• ZF5HP24
• ZF5HP30

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• 258mm LU (4L60-E, 5L40-E)
• 258mm LU (4T65-E)
• 265mm LU (4T60-E, 4T80-E)
• 4L80-E (Dual Stator)

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• 4L60-E
• 4L65-E
• 4L70-E
• 4L60-E '97-earlier only, non-EC3 units

In GM 4L60-E, 4L65-E and 4L70-E units, severe wear of the TCC regulator valve bore is caused by oscillation of the OE valve allows regulated converter apply pressu...Read More

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• 298mm LU (TH250C, TH350C, 200-4R, 4L60 & E)
• 4L60 (700-R4), 4L60-E, 200-4R (298mm), Single Plate Performance Converter (Mounting Ring)
• Adapts front-wheel drive GM 245mm core to GM 298mm applications with 27-tooth input splines.

Sonnax 298mm performance converter mounting ring kit GM-RK-12 kit allows rebuilders to put together a high performance lockup converter. This kit is for use in 4L6...Read More

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• 298mm LU (TH250C, TH350C, 200-4R, 4L60 & E)
• 4L60 (700-R4), 4L60-E, 200-4R (298mm), Single Plate Performance Converter (Mounting Ring)
• Adapts front-wheel drive GM 245mm cores to GM 298mm applications with 30-tooth input splines.

Sonnax 298mm performance converter mounting ring kit GM-RK-11 allows an early GM 245mm core to be adapted for use in 4L60 (700-R4) and 4L60-E applications that ori...Read More

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• 4L60
• 4L60-E

The plastic OE torque converter clutch solenoid snouts are prone to breakage causing them to leak oil that should be directed to the converter clutch apply valve. ...Read More

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• 200-4R
• 4L60

A worn OE pressure regulator valve can be detected in two ways. The first is a dynamometer test that reveals low line pressure during boost conditions (look for 50...Read More

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