Description: Boost Valve KitPart No. 77898E-KValve .490", No GrooveSleeve O-Rings (2)Early pump design, 1.907” length (long) sleeve, increased ratio assembly.GM 4L60-E and 4L65-E transmissions frequently have poor line rise, which can result in 3-4 clutch, 2-4 band failure or poor shift quality. The duty cycle of the EPC solenoid causes the boost sleeve to wear quickly. Oil entering the torque signal orifice leaks past the boost valve and exhausts at the reverse orifice, resulting in poor line rise. Reverse oil can exhaust both to the sump and back through the torque signal orifice. The outside diameter of the boost sleeve also allows some leakage through the pump body, which decreases pressure rise.Sonnax boost valve kit 77898E-K is a increased ratio assembly that will restore hydraulic integrity and prevent leakage in units with early-design pumps. See chart below for usage details and other boost valve options.
Price: 27.91 USD
Location: El Paso, Texas
End Time: 2024-08-26T19:08:25.000Z
Shipping Cost: 0 USD
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Item Specifics
Returns Accepted: ReturnsNotAccepted
OE Spec or Performance/Custom: Performance/Custom
Brand: sonnax
Manufacturer Warranty: No Warranty
Manufacturer Part Number: 77898e-6k
Country/Region of Manufacture: United States
