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

Accumulator Piston Kit
  • 57917e-19k_combo

  • 57917e-19k_combo_alt

  • 57917e-19k_combo_alt2

  • Accumulator Piston Kit

Small_57917e-19k_combo Small_57917e-19k_combo_alt Small_57917e-19k_combo_alt2 Small_57917e-19k

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

Accumulator Piston Kit

Part No. 57917E-19K

  • Piston
  • O-Rings (2) 1 extra

Complaint:

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

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.

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. The 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.

Related Parts

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".

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Valve Body Layouts

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.

Valve Body Layout Toyota A760E/F/H Series
Valve Body Layout Toyota A750E/F Series
Valve Body Layout Toyota U140E/F, U240E, U241E
Valve Body Layout Toyota U151E/F, U250E
Contact a Sonnax Distributor to purchase this part.