This plug is used in two locations in the valve body: to separate the forward abuse and low overrun valves, and to separate the reverse abuse and 3-2 downshift valves.
The Sonnax plug has an increased diameter to restore proper valve body clearance in the circuits
The plug has a smaller retaining pin hole to reduce plug movement that results in wear
No tooling is required for this bore plug
Drop-in Zip Valve parts install quickly and easily
Description
The bore plug in 4L60-E, 4L65-E and 4L70-E units is held loosely in place with a coiled spring pin, allowing the opposing spring and oil pressure forces to stroke it within the bore.
