Cast aluminum accumulator bore wear allows apply oil to exhaust.
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.
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.
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Contact a Sonnax Parts Distributor.
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".