Symptoms:

  • Shift concerns
  • Shift codes
  • Low solenoid feed pressure

Cause:

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

Correction:

Sonnax solenoid modulator accumulator piston kit incorporates 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

Fits Ford (AF21) and Mazda (AW6A-EL) units.

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

Wear at the solenoid modulator accumulator bores in Aisin AW TF-81 units is very common. Wear allows solenoid feed pressure to exhaust resulting in various shift complaints and/or codes. Sonnax solenoid modulator accumulator piston kit 39741-14K incorporates an O-ring for positive sealing and annular grooves for better centering and wear prevention.

  • 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 combats premature wear and eliminates thermal expansion related leakage

Fits either of two locations.

  • Accumulator Piston
  • O-Ring

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.

Aisin AW TF-81SC Valve Body Layout

Aisin AW TF-81SC Valve Body Layout
  • TF-81SC Solenoid Modulator Accumulator Piston Kit 39741-14K
  • TF-81SC Solenoid Modulator Accumulator Piston Kit 39741-14K

You need this if...

Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.

TF-81SC Solenoid Modulator Accumulator Piston Kit Vacuum Test Locations