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

High Performance Pressure Regulator Spring
Part No. 77917-10

1993 & later

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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

Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.

GM 4L60-E, 4L65, 4L70-E Valve Body Layout

GM 4L60-E, 4L65, 4L70-E Valve Body Layout
  • 4L60-E, 4L65-E, 4L70-E High Performance Pressure Regulator Spring 77917-10
  • 4L60-E, 4L65-E, 4L70-E High Performance Pressure Regulator Spring 77917-10