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Symptoms:

  • 3-4 Clutch failure
  • Burnt clutches & bands
  • Pump noise
  • Reduced 3-4 clutch life
  • Rotor fracture
  • Erratic line pressure
  • Low line rise
  • 1-2 Harsh
  • 2-3 Shift feel poor
  • Poor shift quality
  • Code 1870
  • Falls out of lockup when hot
  • No lockup
  • TCC slip

Cause:

Correction:

The parts in this Sure Cure kit repair and restore key areas most prone to TCC-related transmission problems and other issues affecting shift quality.

4L60-E, 4L65-E, 4L70-E

The Sure Cure® Kit
Part No. SC-4L60E

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


View Instructions

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 help rebuilders restore and enhance transmission performance. Sure Cure components are the same Sonnax parts sold individually to resolve common valve body complaints as well as other transmission problems. The high-quality Sonnax parts in each Sure Cure kit repair worn areas and protect the transmission against future damage. Plus, each kit comes with easy-to-read, step-by-step installation guide that covers the inspection and repair of the most critical areas of the valve body.

  • Restores OE shift quality
  • Repairs biggest trouble areas to reduce comebacks
  • Includes step-by-step instructions for comprehensive valve/pump body restoration
  • Get everything you need for restoring troublesome units in one place, at one cost

The '95-later 4L60-E, 4L65-E and 4L70-E units with PWM/EC3 (electronically controlled capacity clutch) control can be identified by the 13-pin case connector, PWM/TCC solenoid and PWM pump (five solenoids). All components in this kit are compatible with '93-'94 non-PWM units EXCEPT the TCC apply valve 77805E-K installed in the pump. These units can be identified by the 12-pin case connector, only having a 3-2 solenoid in valve body (four solenoids).

  • Clip
  • Checkball (8)
  • 1-2 Accumulator Spring
  • Pinless Accumulator Piston Kit
  • D-Ring Servo Seals (5)
  • TCC Apply Valve Kit
  • Shim .015"
  • Pump Slide Pivot Pin
  • Bushing
  • Shim .010"
  • Oversized Boost Valve & Spacer .490" Factory Style
  • Check Valve Kit
  • 3-4 Relay Valve End Plug
  • Oversized Pressure Regulator Valve
  • Actuator Feed Limit Valve Kit
  • Forward & Reverse Abuse Bore Plug (2)
  • TCC Isolator & Regulator Valve Kit

  • Sc 4l60e

Sonnax Sure Cure® Kits

Comprehensive Kit for Big Problems You Don't Want Back

Knowing exactly what parts to replace in troublesome transmissions is an ever-increasing challenge, but Sonnax Sure Cure kits solve this problem for you. Each kit is a comprehensive reconditioning package featuring the best Sonnax products developed to help rebuilders restore and enhance transmission performance.

Learn More about Sonnax Sure Cure Kits