Symptoms:

  • 1-2 Harsh
  • Delayed Forward
  • Cases with worn or scored 1-2 accumulator bores

Cause:

The 1-2 accumulator bore on AODE and 4R70 series cases can become scored, resulting in the loss of 2nd clutch pressure. Once this bore is damaged the case must be replaced.

Correction:

Installing Sonnax drop-in 1-2 accumulator sleeve kit salvages the case.

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

1-2 Accumulator Sleeve Kit
Part No. 76890-01K


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Common complaints in Ford AODE and 4R70 series transmissions are delayed Forward engagement and harsh 1-2 shifts caused by the 1-2 accumulator bore in the case being worn or scored. This wear results in the loss of 2nd clutch pressure and the need to replace the case. Sonnax 1-2 accumulator sleeve kit 76890-01K salvages expensive cases and restores the 1-2 shift.

  • Salvages expensive cases
  • Restores 1-2 shifts
  • Requires no machining of the case
  • Sonnax tool 76890-TL simplifies installation and ensures correct sleeve orientation
  • Drop-in Zip Valve™ parts install quickly and easily
  • Sleeve Small
  • Sleeve Large
  • Piston
  • Piston O-Ring Small
  • Piston O-Ring Large
  • Cover
  • Cover O-Ring
  • 4R70E, 4R70W, 4R75E, 4R75W, AODE 1-2 Accumulator Sleeve Kit 76890-01K
  • 4R70E, 4R70W, 4R75E, 4R75W, AODE 1-2 Accumulator Sleeve Kit 76890-01K