Transmission Parts GM 4L70-E 4L60 4L60-E 4L65-E Case Valve / Sleeve
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Symptoms:

  • 2-3 Soft
  • 2-3 Flare
  • 3-4 Clutch burned
  • 2-4 Band burned
  • 3-2 Bind-up
  • 2-3 Bind-up

Cause:

Inadequate sealing capacity of OE checkball and seat.

Correction:

Install Sonnax OE replacement 3rd accumulator checkball and seat.

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

3rd Accumulator Checkball & Seat
Part No. 74480D

Find a Distributor

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 seat 74480D prevents leaks in the circuit and 3-2/2-3 timing issues and prolongs the life of the 3-4 clutch.

  • 4L60, 4L60-E, 4L65-E, 4L70-E 3rd Accumulator Checkball & Seat 74480D

Related Sonnax Parts

Required

Recommended

4L60, 4L60-E, 4L65-E, 4L70-E Servo Release Check Valve Kit 77701-076

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

Servo Release Check Valve Kit 77701-076

2nd Gear Servo Release

    Helps cure:
  • Reduced 3-4 clutch life
  • 2-3 Shift feel poor
  • 3-2 Bind-up
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