Symptoms:

  • Erratic shift timing
  • Oil leaks

Cause:

Leaking valve end plugs in pre mid-'83 units, or worn 3-4 shift valve and sleeve in mid-'83 and later units.

Correction:

Replace worn, leaking valve end plugs with Sonnax O-ringed end plug. Manufactured from high-quality aluminum, these end plugs are to resistant to wear.

4R70E, 4R70W, 4R75E, 4R75W, AOD, AODE

O-Ringed End Plug Kit
Part No. 76999-MED

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 O-ringed end plug kit 76999-MED can eliminate this excess leakage.

Replacement plugs are included for the following valve applications: 1-2 shift, 2-3 shift and 3-4 shift (plug or sleeve).

  • Plugs have been manufactured from 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
  • End Plugs (3) Medium
  • O-Rings (6) 3 Extra
  • 4R70E, 4R70W, 4R75E, 4R75W, AOD, AODE O-Ringed End Plug Kit 76999-MED
  • 4R70E, 4R70W, 4R75E, 4R75W, AOD, AODE O-Ringed End Plug Kit 76999-MED
  • 4R70E, 4R70W, 4R75E, 4R75W, AOD, AODE O-Ringed End Plug Kit 76999-MED