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Symptoms:
  • Low solenoid feed pressure
  • Shift codes
  • Shift concerns
Cause:

Wear at the cast aluminum accumulator bores by the steel pistons allows apply oil to exhaust.

Correction:

The drop-in replacement anodized aluminum Sonnax accumulator pistons incorporate an O-ring for positive sealing and annular grooves for better centering and wear prevention.

TF-81SC

Solenoid Modulator Accumulator Piston Kit

Part No.

39741-14K

Solenoid Modulator Accumulator Piston Kit
  • 39741-14k_combo

  • Solenoid Modulator Accumulator Piston Kit

Small_39741-14k_combo Small_39741-14k

TF-81SC

Solenoid Modulator Accumulator Piston Kit

Part No. 39741-14K

  • Piston
  • O-Ring

Complaint:

  • Low solenoid feed pressure
  • Shift codes
  • Shift concerns

Cause:

Wear at the cast aluminum accumulator bores by the steel pistons allows apply oil to exhaust.


Correction:

The drop-in replacement anodized aluminum Sonnax accumulator pistons incorporate an O-ring for positive sealing and annular grooves for better centering and wear prevention.

Wear at the solenoid modulator accumulator bores on this TF-81 unit is very common. Wear allows solenoid feed pressure to exhaust resulting in various shift complaints and/or codes. The Sonnax accumulator piston incorporates an O-ring for positive sealing and annular grooves for better centering and wear prevention.

  • Drop-in replacement pistons no special tools required.
  • Pistons incorporate an o-ring for positive sealing, even on worn bores.
  • Annular grooves added for better piston centering and wear prevention.
  • Anodized aluminum piston prevents wear and eliminates thermal expansion related leakage.
NOTE:

Two Locations. Fits Ford (AF21) and Mazda(AW6A-EL)

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".

  • Test Locations

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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 Aisin AW TF-81SC
Contact a Sonnax Distributor to purchase this part.