Tool Required VB-FIX Required

Printpartsummary
Symptoms:
  • Bind-up
  • C3 Clutch burned
  • Erratic shift timing
  • Pressure control out-of-range codes
  • Slipping
  • Slips & flares
Cause:

Oscillation of the C3 clutch control valve causes bore wear, allowing critical pressure escape and preventing proper actuation of C3 clutches.

Correction:

Recover hydraulic control and renew shift performance by reconditioning bore and installing Sonnax oversized C3 clutch control valve kit.

Tool Required VB-FIX Required

TF-80SC, TF-81SC

Oversized C3 Clutch Control Valve Kit

Part No.

39741-50K

Oversized C3 Clutch Control Valve Kit
  • 39741-50k_combo

  • Oversized C3 Clutch Control Valve Kit

Small_39741-50k_combo Small_39741-50k

TF-80SC, TF-81SC

Oversized C3 Clutch Control Valve Kit

Part No. 39741-50K

  • Valve
  • Spring

Also compatible with AF21, AF40, AF40/6, AM6, AW6A-EL.

Complaint:

  • Bind-up
  • C3 Clutch burned
  • Erratic shift timing
  • Pressure control out-of-range codes
  • Slipping
  • Slips & flares

Cause:

Oscillation of the C3 clutch control valve causes bore wear, allowing critical pressure escape and preventing proper actuation of C3 clutches.


Correction:

Recover hydraulic control and renew shift performance by reconditioning bore and installing Sonnax oversized C3 clutch control valve kit.

C3 clutches in Aisin AW TF-80SC and TF-81SC transmissions are applied in third, fifth and Reverse gears in conjunction with other clutch packs. As the C3 clutch control valve oscillates and strokes over time, bore deterioration results, which prevents proper hydraulic control of the C3 clutch pack. This can cause flares, slipping, erratic clutch apply timing, ratio codes, bind-ups, and burnt C3 clutches. Reconditioning the bore and installing Sonnax oversized C3 clutch control valve kit 39741-50K restores normal shift operation and feel by re-establising the hydraulic integrity of the C3 circuit.

  • Annular groove helps center valve in bore to reduce future side-load wear
  • New spring matches OE calibration
  • Hardcoat anodized aluminum valve combats premature wear

Required Tools

Related Parts

You need this if...

Vacuum testing at the port(s) indicated fails to hold the recommended minimum 18 in-Hg, or if wear is visually detected.

  • 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-80SC
Valve Body Layout Aisin AW TF-81SC
Contact a Sonnax Distributor to purchase this part.