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Performance Pack HP-4L60E-01

  • 4L60-E
  • 4L65-E
  • 4L70-E
  • Fits '94-later units.

The Sonnax Performance Pack for GM 4L60-E, 4L65-E and 4L70-E transmissions is a must-have for any heavy-duty vehicle and the very best foundation for high-performa...Read More

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4L60-E, 4L65-E, 4L70-E Performance Pack HP-4L60E-01

Line Pressure Booster Kit 4L60E-LB1

  • 4L60-E
  • 4L65-E
  • 4L70-E
  • Early style

Line pressure booster kit 4L60E-LB1 fits early-style GM 4L60-E, 4L65-E and 4L70-E pumps. Sonnax hydraulic line pressure booster kits contain stronger pressure regu...Read More

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4L60-E, 4L65-E, 4L70-E Line Pressure Booster Kit 4L60E-LB1

Line Pressure Booster Kit 4L60E-LB2

  • 4L60-E
  • 4L65-E
  • 4L70-E
  • Late style

Line pressure booster kit 4L60E-LB2 fits late-style GM 4L60-E, 4L65-E and 4L70-E pumps. Sonnax hydraulic line pressure booster kits contain stronger pressure regul...Read More

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4L60-E, 4L65-E, 4L70-E Line Pressure Booster Kit 4L60E-LB2

The Sure Cure® Kit SC-4L60E

  • 4L60-E
  • 4L65-E
  • 4L70-E
  • Fully compatible with '95-later with PWM/EC3 (electronically controlled capacity clutch) control.

Sonnax Sure Cure kit SC-4L60E is a comprehensive reconditioning package for GM 4L60-E, 4L65-E and 4L70-E PWM units featuring the best Sonnax products developed to ...Read More

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4L60-E, 4L65-E, 4L70-E The Sure Cure® Kit SC-4L60E

Accordion Spring GM-S-11A

  • 300mm (4L60-E)
  • 6L90 (Captive Clutch)
  • AT-500
  • MT-600
  • TH400 (3L80), AT-540

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300mm (4L60-E), 6L90 (Captive Clutch), AT-500, MT-600, TH400 (3L80), AT-540 Accordion Spring GM-S-11A

Accumulator Valve Train Kit 77754-10K

  • 4L60-E
  • 4L65-E
  • 4L70-E
  • Fits valve trains with sleeve stamp codes CX, DX or YZ only.

Vehicles with GM 4L60-E, 4L65-E or 4L70-E transmissions can experience light throttle shifts and poor shift quality as well as early 2-4 band failure. These proble...Read More

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4L60-E, 4L65-E, 4L70-E Accumulator Valve Train Kit 77754-10K

Performance Pack HP-4L80E-01

  • 4L80-E
  • 4L85-E

Sonnax Performance Pack HP-4L80E-01 upgrades GM 4L80-E and 4L85-E transmissions for maximum performance and durability in work/sport vehicles. Innovative component...Read More

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4L80-E, 4L85-E Performance Pack HP-4L80E-01

Planetary Rebuild Kit 77731-RK

  • 4L60
  • 4L60-E
  • Fits 4-pinion rear planetary

The rear planetary assembly in GM 4L60 (700-R4) and 4L60-E transmissions frequently wears out and must be replaced. New replacement assemblies can be costly, and t...Read More

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4L60, 4L60-E Planetary Rebuild Kit 77731-RK

Stator Cap GM-WA-28

  • 280mm LU (4L60-E) “VJCX”
  • 300mm (4L60-E)
  • 6L80, 6L90 (300mm)

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280mm LU (4L60-E) “VJCX”, 300mm (4L60-E), 6L80, 6L90 (300mm) Stator Cap GM-WA-28

Accumulator Valve Train Kit 77777M-K

  • 200-4R
  • 4L60
  • 4L60-E
  • Fits "M" version valve trains in heavy weight vehicles, .341" dia. In 4L60, fits '87-later auxiliary valve body styles only.

Vehicles with a GM 200-4R, 700-R4, or 4L60-E transmission can experience 1-2 light throttle abrupt or bang shifts, especially when using the 093 Corvette or 553 2n...Read More

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200-4R, 4L60, 4L60-E Accumulator Valve Train Kit 77777M-K

Accumulator Valve Train Kit 77777L-K

  • 200-4R
  • 4L60
  • 4L60-E
  • Fits "L" version valve trains in light/medium weight vehicles, .330" dia. Fits 4L60 '87-later auxiliary valve body styles only.

Vehicles with a GM 200-4R, 700-R4, or 4L60-E transmission can experience 1-2 light throttle abrupt or bang shifts, especially when using the 093 Corvette or 553 2n...Read More

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200-4R, 4L60, 4L60-E Accumulator Valve Train Kit 77777L-K

Heavy Duty Input Shaft 77733-10SB

  • 4L60
  • 4L60-E
  • 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.

Input shaft failure is a common problem in GM 4L60 and 4L60-E units as power levels are increased. Sonnax heavy duty input shaft 77733-10SB for 298mm torque conver...Read More

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4L60, 4L60-E Heavy Duty Input Shaft 77733-10SB

Oversized Forward & Reverse Abuse Valve Kit 77754-58K

  • 4L60-E
  • 4L65-E
  • 4L70-E
  • Fits in either of two locations.

Continuous oscillation of the Forward and Reverse abuse valves in GM 4L60-E, 4L65-E and 4L70-E units creates bore wear, allowing clutch feed pressure to exhaust. T...Read More

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4L60-E, 4L65-E, 4L70-E Oversized Forward & Reverse Abuse Valve Kit 77754-58K

Vacuum Test Plate Kit 77754-VTP

  • 4L60-E
  • 4L65-E
  • 4L70-E

A worn valve or valve body bore can result in incorrect pressures in the transmission, which may lead to poor performance or failure of the transmission. With the ...Read More

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4L60-E, 4L65-E, 4L70-E Vacuum Test Plate Kit 77754-VTP

Impeller Hub GM-90-94G

  • 280mm LU (4L60-E) “VJCX”

Sonnax flanged impeller hub GM-90-94G replaces worn or damaged hubs in GM 280mm LU (4L60-E) "VJCX" converters. These units have experienced higher-than-normal pump...Read More

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280mm LU (4L60-E) “VJCX” Impeller Hub GM-90-94G

Heavy Duty 2-3 Shift Valve 77754-41

  • 4L60-E
  • 4L65-E
  • 4L70-E

When the GM 4L60-E family of transmissions evolved from the 700-R4, the overrun clutch is no longer applied in 1st and 2nd when accelerating from a stop in D3 shif...Read More

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4L60-E, 4L65-E, 4L70-E Heavy Duty 2-3 Shift Valve 77754-41

AX Code Accumulator Valve Sleeve 77754-61

  • 4L60-E
  • 4L65-E
  • 4L70-E
  • Replaces OE sleeves with "AX" code only.

Various shift concerns are common in vehicles equipped with GM 4L60-E, 4L65-E or 4L70-E transmissions.  This can often be caused by wear at the accumulator valve s...Read More

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4L60-E, 4L65-E, 4L70-E AX Code Accumulator Valve Sleeve 77754-61

Heavy Duty Reaction Shaft Kit 74602-01K

  • 4L60
  • 4L60-E
  • 4L65-E
  • 4L70-E
  • Universal kit, fits all years and all input carrier styles.

GM 4L60E series reaction shafts used in high-torque applications — and especially in heavy vehicles — suffer from two common issues that require replacement: The s...Read More

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4L60, 4L60-E, 4L65-E, 4L70-E Heavy Duty Reaction Shaft Kit 74602-01K

Oversized Low Overrun Valve Kit 77754-62K

  • 4L60-E
  • 4L65-E
  • 4L70-E

The low overrun valve directs line pressure to the reverse input and low and reverse clutches. As the bore deteriorates, line pressure at the inboard location cros...Read More

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4L60-E, 4L65-E, 4L70-E Oversized Low Overrun Valve Kit 77754-62K

Heavy Duty Input Shaft 77733-10S

  • 4L60
  • 4L60-E
  • NEW VERSION AVAILABLE UNDER PART #77733-10SB. 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.

Oversized Servo Pin Kit 77787-03K

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

Sonnax oversized servo pin kit 77787-03K is for use in reconditioned GM 4L60, 4L60-E, 4L65-E and 4L70-E case bores. Matching the longest OE pin length, this chromo...Read More

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4L60, 4L60-E, 4L65-E, 4L70-E Oversized Servo Pin Kit 77787-03K

SmartShell® Heavy Duty Reaction Shell Kit 77749-02K

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

In GM 4L60, 4L60-E, 4L65-E and 4L70-E units, bulky aftermarket shells always fall short when splines continue to strip and the shells break under stress. A chronic...Read More

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4L60, 4L60-E, 4L65-E, 4L70-E SmartShell® Heavy Duty Reaction Shell Kit 77749-02K

Input Drum Reinforcement Kit 77733-02K

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

The GM 4L60, 4L60-E, 4L65-E and 4L70-E input drum assembly is known to crack where the input shaft is pressed into it (where the overrun clutch rides). Sonnax offe...Read More

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4L60, 4L60-E, 4L65-E, 4L70-E Input Drum Reinforcement Kit 77733-02K

3-4 Clutch Boost Spring 77763-01

  • 4L60
  • 4L60-E
  • 4L65-E
  • 4L70-E
  • Fits '88-later units.

Sonnax 77763-01 boost springs offer a low cost, direct replacement alternative to the OE springs in GM 4L60, 4L60-E, 4L65-E and 4L70-E units. Engineered for the ap...Read More

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4L60, 4L60-E, 4L65-E, 4L70-E 3-4 Clutch Boost Spring 77763-01

Input Housing Overrun Sleeve Kit 77733-51KA

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

The GM 4L60, 4L60-E, 4L65-E and 4L70-E input drum assembly is known to crack and strip out splines where the input shaft is pressed into it (where the overrun pist...Read More

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4L60, 4L60-E, 4L65-E, 4L70-E Input Housing Overrun Sleeve Kit 77733-51KA

Heavy Duty Input Shaft 77733-11S

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

Thrust Bearing GM-N-20

  • 280mm LU (4L60-E) “VJCX”
  • 300mm (4L60-E)
  • 4L80-E (Late Single Stator)
  • 6L80, 6L90 (300mm)
  • 6L80, 6L90 (300mm)

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280mm LU (4L60-E) “VJCX”, 300mm (4L60-E), 4L80-E (Late Single Stator), 6L80, 6L90 (300mm), 6L80, 6L90 (300mm) Thrust Bearing GM-N-20

Input Housing Forward Sleeve Kit 77733-52K

  • 4L60
  • 4L60-E
  • 4L65-E
  • 4L70-E
  • Requires Sonnax overrun sleeve and compatible overrun piston. See instructions for details.

Input housing failure at the shaft and forward piston areas is common in high-torque 4L60, 4L60-E, 4L65-E and 4L70-E transmissions. Sonnax input housing forward sl...Read More

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4L60, 4L60-E, 4L65-E, 4L70-E Input Housing Forward Sleeve Kit 77733-52K

Heavy Duty Input Shaft 77733-12S

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

4th Gear Super Hold Dual Servo Kit 77767K

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

Sonnax 4th Gear super hold dual servo kit 77767K features 40% more apply surface area for greater holding power in GM 4L60 (700-R4), 4L60-E, 4L65-E and 4L70-E unit...Read More

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4L60, 4L60-E, 4L65-E, 4L70-E 4th Gear Super Hold Dual Servo Kit 77767K
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