Forward or direct clutch oil pressure loss can often be traced to wear and scoring of the 2-3 accumulator bores. Previously, the only lasting correction was to replace the case. Sonnax 2-3 accumulator piston kit 76890-21K restores Forward line pressure and salvages damaged cases by repairing damaged 2-3 accumulator bores on AOD, AODE, 4R70E, 4R70W, 4R75E, 4R70W and 4R75W units. Press-in sleeves and a matched piston restore pressures and install easily, without machining or special tools.

Salvage transmission cases with damaged accumulator bore
Kit installs easily, with no special tools required
Eliminates concerns about bonded piston seal delamination
Forward or direct clutch oil pressure loss can often be traced to wear and scoring of the 2-3 accumulator bores. Previously, the only lasting correction was to replace the case. Sonnax 2-3 accumulator piston kit 76890-21K restores Forward line pressure and salvages damaged cases by repairing damaged 2-3 accumulator bores on AOD, AODE, 4R70E, 4R70W, 4R75E, 4R70W and 4R75W units. Press-in sleeves and a matched piston restore pressures and install easily, without machining or special tools.

Salvage transmission cases with damaged accumulator bore
Kit installs easily, with no special tools required
Eliminates concerns about bonded piston seal delamination