Sonnax 77917-10 High Performance Pressure Regulator Spring for 4L60E 4L65E 4L70E

Brand: Sonnax Type: Pump Spring Interchange Part Number: S74507PE-3HP  Manufacturer Warranty: Yes Fitment Type: Performance/Custom Items Included: Performance Pressure Regulator Valve Spring Manufacturer Part Number: 77917-10 Material: Steel Universal Fitment: Yes Performance Part: Yes 4L60-E, 4L65-E, 4L70-E Transmission Pump High Performance Pressure Regulator SpringPart No. 77917-10 1993 & later 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