4L60E 4L65E 4L70E Oversized Pressure Regulator Valve Sonnax 77917-07

img{max-width:100%} 4L60E 4L65E 4L70E Oversized Pressure Regulator Valve Sonnax 77917-07 A worn OE pressure regulator valve can be detected in two ways. The first is a dynamometer test that reveals low line pressure during boost conditions (look for 50-100 psi less than specified in Reverse). The second is vehicle symptoms such as clutch slippage, reverse chatter and 3-4 clutch failure. Any of the above problems indicate bore wear that should be addressed.To address pressure regulator leakage in GM 4L60-E, 4L65-E and 4L70-E pump bodies, Sonnax offers oversized pressure regulator valve 77917-07. The Sonnax valve permits pump covers to be restored to OE specifications by correcting for wear and leakage at the pressure regulator valve.Refurbish the pump cover by reaming the bore and installing an oversized pressure regulator valveThe pressure regulator valve helps restore control over the pressure regulating circuit by eliminating leakageNoteBoost valves should be checked for leakage at the same time the pressure regulator valve is being replaced.Parts ship daily from our distribution center.FREE SHIPPING on US OrdersIn a Hurry - this item is available for expedited shippingGOT QUESTIONS on your specific Year/Make/Model? Send us a message ¿Habla español? Escríbanos con el año, la marca, y el modelo de su vehículo. If you have any problems with your order, please contact us immediately to resolve your issue. We have a technician available to assist you.This item is packaged for Wholesale Distribution WARRANTY requests need to be accompanied with the appropriate codeas diagnosed by a professional transmission shop.Vehicles must be professionally diagnosed for solenoid failure prior to purchase.We cannot guarantee any one item will fix all transmission problems.Solenoid failure is often accompanied by additional failures;for example valve body failures, internal wear or damaged hard parts. Visit our eBay Store: Phoenix Transmission PartsFor all of your Automatic Transmission Part needsCheck out my other items!Be sure to add me to your favorites list!