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Enhanced Performance Accumulator Spring 77704S

  • 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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200-4R, 4L60, 4L60-E, 4L65-E, 4L70-E Enhanced Performance Accumulator Spring 77704S

Thrust Washer 77409-16

  • 4L60
  • 4L60-E
  • 4L65-E
  • 4L70-E
  • Selective, OE-Style
This part has been discontinued.

Replacement Seal Kit 77987-SK

  • 4L60-E
  • 4L65-E
  • 4L70-E

Replacement seal kit for 77987-01K

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4L60-E, 4L65-E, 4L70-E Replacement Seal Kit 77987-SK

Shim 77409-15

  • 4L60
  • 4L60-E
  • 4L65-E
  • 4L70-E
  • Front bearing

Sonnax has designed .015" thick front endplay shim 77409-15 for listed GM units to better help the needs of the rebuilder in the selection of shims when checking f...Read More

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4L60, 4L60-E, 4L65-E, 4L70-E Shim 77409-15

Oversized Pressure Regulator Valve 77917-06

  • 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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200-4R, 4L60 Oversized Pressure Regulator Valve 77917-06

Pump Vane 1280

  • 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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200-4R, 3T40 (TH125C), 4L60, 4L60-E, 4L65-E, 4L70-E Pump Vane 1280

Wide Reaction Sun Gear Bushing 77010-01

  • 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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4L60, 4L60-E, 4L65-E, 4L70-E Wide Reaction Sun Gear Bushing 77010-01

Reamer 77787-RM3

  • 4L60
  • 4L60-E
  • 4L65-E
  • 4L70-E

Reamer for 77787-03K.

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4L60, 4L60-E, 4L65-E, 4L70-E Reamer 77787-RM3

Smart-Tech® Input Housing Kit with Heavy Duty Input Shaft 77733-10KA

  • 4L60
  • 4L60-E
  • NEW VERSION AVAILABLE UNDER PART #77733-10KB. For '85-later units with 298mm converter, 30-spline input shaft. For '82-'84 units with 27-spline input shaft, converter and stator shaft will need to be updated to '85-later design.
This part has been discontinued. Click here to see the part instructions.

Pilot GM-PI-21

  • 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 (300mm), Single-Plate Performance Converter, 4L60-E, 4L65-E, 4L75-E (300mm), Multi-Plate Performance Converter, 4L80-E, 4L85-E, Multi-Plate Performance Converter Pilot GM-PI-21

Pump Spring Spacer 77917-RV

  • 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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200-4R, 4L60, 4L60-E, 4L65-E, 4L70-E Pump Spring Spacer 77917-RV

Replacement Seal Kit 77767K-SK

  • 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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4L60, 4L60-E, 4L65-E, 4L70-E Replacement Seal Kit 77767K-SK

Replacement Seal Kit 77911-03SK

  • 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 Replacement Seal Kit 77911-03SK

Turbine Hub GM-HTCM-57

  • 4L60-E (300mm), Single-Plate Performance Converter (Mounting Ring)
  • Does not fit stock applications, for use only with GM-RK-13 when using late, front-wheel drive GM 245mm cores.

Sonnax weld-in turbine hub GM-HTCM-57, along with performance converter kit GM-RK-13, adapts late, front-wheel drive GM 245mm cores for use in GM 4L60-E transmissi...Read More

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4L60-E (300mm), Single-Plate Performance Converter (Mounting Ring) Turbine Hub GM-HTCM-57

Pump Slide Spring 77722-01K

  • 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 Pump Slide Spring 77722-01K

Smart-Tech® Input Housing Kit with Heavy Duty Input Shaft 77733-12KA

  • 4L60-E
  • 4L65-E
  • 4L70-E
  • NEW VERSION AVAILABLE UNDER PART #77733-12KB. For units with 300mm converter, reluctor-style shaft.
This part has been discontinued. Click here to see the part instructions.

Tool Kit 77917-TLC

  • 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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200-4R, 4L60, 4L60-E, 4L65-E, 4L70-E Tool Kit 77917-TLC

Smart-Tech® Input Housing Kit with Heavy Duty Input Shaft 77733-11KA

  • 4L60-E
  • 4L65-E
  • 4L70-E
  • NEW VERSION AVAILABLE UNDER PART #77733-11KB. For units with 300mm converter, non-reluctor style shaft.
This part has been discontinued. Click here to see the part instructions.

Bushing 77005T

  • 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, 5L40-E, 5L50-E, Powerglide Bushing 77005T

Pinless Accumulator Piston Kit 77998-03K

  • 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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200-4R, 4L60, 4L60-E, 4L65-E, 4L70-E Pinless Accumulator Piston Kit 77998-03K

Smart-Tech® Input Housing Kit 77733-06KA

  • 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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4L60, 4L60-E, 4L65-E, 4L70-E Smart-Tech® Input Housing Kit 77733-06KA

Turbine Hub GM-HT-53HS

  • 4L60 (700-R4), 4L60-E, 200-4R (298mm) Single Plate Performance Converter (Mounting Ring)
This part has been discontinued.

Turbine Hub GM-HT-45HS

  • 280mm LU (4L60-E) “VJCX”
  • 300mm (4L60-E)
This part has been discontinued.

Tool Kit 55211-TL8

  • 5L40-E
  • 5L50-E

Tool Kit for 55211-08K

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5L40-E, 5L50-E Tool Kit 55211-TL8

Front Cover GM-CC-17

  • 300mm (4L60-E)
  • For use in TMBX converters only.

Sonnax front cover GM-CC-17 replaces OE two-piece design covers. Its one-piece design improves strength and eliminates welds that often flex or crack.

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300mm (4L60-E) Front Cover GM-CC-17

Inner Stator Race GM-HR-17

  • 258mm LU (4L60-E, 5L40-E)
  • 265mm LU (4T60-E, 4T80-E)
  • 4L80-E (Early Single Stator)
  • 4L80-E (Late Single Stator)
  • 6L80, 6L90 (300mm)
  • Converts GM 6L80, 6L90 (300mm), GM 258mm LU (4L60-E, 5L40-E) or GM 265mm LU (4T60-E, 4T80-E) converter cores to a 37-tooth internal spline for use in GM 4L80-E single stator applications.

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258mm LU (4L60-E, 5L40-E), 265mm LU (4T60-E, 4T80-E), 4L80-E (Early Single Stator), 4L80-E (Late Single Stator), 6L80, 6L90 (300mm) Inner Stator Race GM-HR-17

Shim GM-WS-24

  • 280mm LU (4L60-E) “VJCX”
  • 300mm (4L60-E)
  • 4L80-E (Late Single Stator)

Sonnax shim GM-WS-24 is a drop-in addition when modifications have been made to the impeller or turbine hub. It can also be used with Sonnax thrust bearing GM-N-18.

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280mm LU (4L60-E) “VJCX”, 300mm (4L60-E), 4L80-E (Late Single Stator) Shim GM-WS-24

Shim GM-WS-25

  • 280mm LU (4L60-E) “VJCX”
  • 300mm (4L60-E)
  • 4L80-E (Late Single Stator)

Sonnax shim GM-WS-25 is a drop-in addition when modifications have been made to the impeller or turbine hub. It can also be used with Sonnax thrust bearing GM-N-18.

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280mm LU (4L60-E) “VJCX”, 300mm (4L60-E), 4L80-E (Late Single Stator) Shim GM-WS-25

Shim GM-WS-26

  • 280mm LU (4L60-E) “VJCX”
  • 300mm (4L60-E)
  • 4L80-E (Late Single Stator)

Sonnax shim GM-WS-26 is a drop-in addition when modifications have been made to the impeller or turbine hub. It can also be used with Sonnax thrust bearing GM-N-18.

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280mm LU (4L60-E) “VJCX”, 300mm (4L60-E), 4L80-E (Late Single Stator) Shim GM-WS-26

Thrust Bearing GM-N-18

  • 280mm LU (4L60-E) “VJCX”
  • 300mm (4L60-E)
  • 4L80-E (Late Single Stator)

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280mm LU (4L60-E) “VJCX”, 300mm (4L60-E), 4L80-E (Late Single Stator) Thrust Bearing GM-N-18
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