Sonnax 77964-04K Transmission Valve Kit, 4-3 Sequence (Requires 77964-RM2)
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Sonnax 77964-04K Transmission Valve Kit, 4-3 Sequence (Requires 77964-RM2)

$57.51
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Brand: SonnaxOther Part Number: S74741ARKType: Valve BodyItems Included: 3-4 Relay Valve, 4-3 Sequence Valve, End Plug, O-ring-RManufacturer Part Number: 77964-04KMaterial: AluminumUniversal Fitment: YesVintage Part: NoPerformance Part: Yes 4L60-E, 4L65-E, 4L70-E Oversized 4-3 Sequence Valve KitPart No. 77964-04K Tooling Required: 77964-RM2 GM 4L60-E, 4L65-E and 4L70-E transmissions often have trouble shifting into or holding 4th Gear due to excess wear in the sequence valve bore. This wear allows vital 4th Gear accumulator oil to exhaust, resulting in deficient servo apply pressure. Consequences are slipping or no 4th Gear operation followed closely by a burnt band. Leaking at the OE end plug also allows oil loss that can leave 4th Gear inoperable. Re-establish hydraulic control and restore normal operation by reconditioning the bore and installing Sonnax oversized 4-3 sequence valve kit 77964-04K. O-Ringed end

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