January 25, 2023
Uncovering the Root Cause of Pressure & Complaints – The Critical Role of Solenoid Modulator & AFL Valves
Maura Stafford
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 drop-in 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. Fits either of two locations.
You need this if... View Instructions Find a DistributorWear 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
- Drop-in Zip Valve™ parts install quickly and easily
- 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
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.
