Sonnax 77917-07 4L60E -OVERSIZED- Pressure Regulator Valve REAMER ROOL REQUIRED

Brand: sonnax Type: Pump Component Interchange Part Number: S74507PE-1 Manufacturer Warranty: Yes Items Included: Pressure Regulator Valve -OVERSIZED- Manufacturer Part Number: 77917-07  Universal Fitment: Yes Performance Part: No 4L60-E, 4L65-E, 4L70-E Transmission Oversized Pressure Regulator ValvePart No. 77917-07 Tooling Required: 77917-TL 77917-TLC 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