4L60E 4L65E 4L70E High Performance Pressure Regulator Spring

Sonnax Part Number: 77917-10

1993-UP Model Years

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