• Erratic shift timing
  • Oil leaks


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 drop-in O-ringed end plugs. Manufactured from high-quality aluminum, these end plugs are resistant to wear.


Governor Circuit End Plug Kit
Part No. 76999-05K

Fits units mid-'83-later.

View Instructions Find a Distributor

Vehicles with Ford AOD transmissions 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 76999-05K can eliminate this excess 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, O.D. servo regulator, 3-4 shift (plug or sleeve), and either the 3-4 shuttle or 2-3 backout.

  • Plugs have been manufactured from of high-quality aluminum designed to resist wear
  • O-Ring on the O.D. prevents leakage between the plug and the valve body
  • Plugs have a standard 8-32 UNC threaded hole for assistance in installation and removal
  • O-Ringed plugs are more durable than knurling the O.D. of the original plug
  • Drop-in Zip Valve™ parts install quickly and easily
Learn More About Zip Valve™ Drop-In Repairs
  • 3-4 Shift Valve
  • 3-4 Shift Sleeve
  • End Plugs (2) Medium
  • End Plug Small
  • O-Rings (8) 4 Extra

Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.

Ford AOD Valve Body Layout

Ford AOD Valve Body Layout
  • AOD Governor Circuit End Plug Kit 76999-05K
  • AOD Governor Circuit End Plug Kit 76999-05K