Symptoms:

  • Delayed engagement
  • Flare shifts
  • Forward slip
  • Burnt clutches

Cause:

Cast aluminum accumulator bore wear allows apply oil to exhaust.

Correction:

Sonnaxs anodized aluminum accumulator piston incorporates an O-Ring for positive sealing and annular grooves for better centering and wear prevention.

A750E, A750F, A760E, A760F, A760H, A761E, A960E, A960F, AB60E, AB60F, U140E, U140F, U151E, U151F, U240E, U241E, U250E

Accumulator Piston Kit
Part No. 57917E-19K

You need this if... View Instructions Find a Distributor

Wear at the multiple accumulator bores on these various units is very common. This wear allows component apply oil to exhaust, resulting in delayed engagements, slipping or flare shifts and burned clutches. Drop-in-place Sonnax accumulator piston kit 57917E-19K incorporates an O-ring for positive sealing, even in worn bores.

  • No machining or special tools required
  • O-Ring provides positive seal even in worn bores
  • O-Ringed piston fits multiple locations
  • Piston
  • O-Rings (2) 1 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.

Toyota U140E/F, U240E, U241E Valve Body Layout

Toyota U140E/F, U240E, U241E Valve Body Layout

Toyota A750E/F Series Valve Body Layout

Toyota A750E/F Series Valve Body Layout

Toyota A760E/F/H Series Valve Body Layout

Toyota A760E/F/H Series Valve Body Layout

Toyota U151E/F, U250E Valve Body Layout

Toyota U151E/F, U250E Valve Body Layout
  • A750E, A750F, A760E, A760F, A760H, A761E, A960E, A960F, AB60E, AB60F, U140E, U140F, U151E, U151F, U240E, U241E, U250E Accumulator Piston Kit 57917E-19K
  • A750E, A750F, A760E, A760F, A760H, A761E, A960E, A960F, AB60E, AB60F, U140E, U140F, U151E, U151F, U240E, U241E, U250E Accumulator Piston Kit 57917E-19K
  • A750E, A750F, A760E, A760F, A760H, A761E, A960E, A960F, AB60E, AB60F, U140E, U140F, U151E, U151F, U240E, U241E, U250E Accumulator Piston Kit 57917E-19K
  • A750E, A750F, A760E, A760F, A760H, A761E, A960E, A960F, AB60E, AB60F, U140E, U140F, U151E, U151F, U240E, U241E, U250E Accumulator Piston Kit 57917E-19K

You need this if...

Visual inspection of the bore often shows shiny patches of wear. If wear is visible, perform at Wet Air Test or Vacuum Test at the apply port. Vacuum Test must hold a minumum of 18".