Leaking valve end plugs in pre mid-'83 units, or worn 3-4 shift valve and sleeve in mid-'83 and later units.
Replace worn, leaking valve end plugs with Sonnax O-ringed end plugs. Manufactured from high-quality aluminum, these end plugs are to resistant to wear. In addition, the O-ring on the outside diameter prevents leakage between the plug and the valve body.
Vehicles with an AOD transmission often have shift timing complaints due to governor or accumulator oil circuit leakage caused by leaking valve end plugs in the valve body. Most AOD valve assemblies are designed with an end plug to help retain the lineup and seal the circuitry. As these end plugs wear, circuit oil is lost and affects shift timing. Installing Sonnax governor circuit end plug kit 76999-04K can eliminate this excessive leakage.
Replacement plugs are included for the following valve applications: 1-2 accumulator, 1-2 shift, 2-3 shift, 1-2 capacity modulator, orifice control, OD servo regulator, 3-4 shift (plug or sleeve), and either the 3-4 shuttle or 2-3 backout.