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

High Performance Pressure Regulator Spring
Part No. 77917-10

1993 & later

View Instructions

This high-quality, heavy-duty pressure regulator valve spring 77917-10 from Sonnax fits GM 4L60-E, 4L65-E and 4L70-E transmissions. The spring increases line pressure by approximately 13%, improving transmission performance in both standard and high performance applications.

  • Increases line pressure by approximately 13%
  • Produces firmer engagements/upshifts without creating harshness or clunky downshifts
  • Improves transmission performance in both standard and high performance applications
  • 77917 10 combo
  • 77917 10