4L60E 4L65E Boost Valve and Sleeve 1993-2005
for early pump design 1.907" long sleeve .470" spool diameter o-ring style
Sonnax Upgrade
Features:
- Valve
- Sleeve
- O-ring - 2
- Installation Instructions
Description: Vehicles with a 4L60E, 4L65E or 4L70E transmission 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 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 offers a number of designs. If you are not sure which one you need, give us a call and we will match the part up for you.
Parts ship daily from our distribution center.
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