Tool Required VB-FIX Required

Printpartsummary
Symptoms:
  • 4th Slip
  • 5th Slip
  • 6th Slip
  • Code 734, 735, 729
  • Kickdown shock
  • Kickdown slip
Cause:

Solenoid modulator valve or bore wear can result in excess or insufficient feed pressure to a variety of solenoids, adversely affecting shift functions.

Correction:

The Sonnax wear-resistant sleeve and valve corrects circuit pressure loss and restores control over solenoid modulator valve function.

Tool Required VB-FIX Required

TF-80SC, TF-81SC

Oversized Solenoid Modulator Valve Kit

Part No.

39741-18K

Oversized Solenoid Modulator Valve Kit
  • 39741-18k_combo

  • 39741-18k_combo2

  • Oversized Solenoid Modulator Valve Kit

Small_39741-18k_combo Small_39741-18k_combo2 Small_39741-18k

TF-80SC, TF-81SC

Oversized Solenoid Modulator Valve Kit

Part No. 39741-18K

  • Valve
  • Sleeve
  • Spring
  • End Plug Use in TF-81SC Only

Fits either of 2 locations.

Complaint:

  • 4th Slip
  • 5th Slip
  • 6th Slip
  • Code 734, 735, 729
  • Kickdown shock
  • Kickdown slip

Cause:

Solenoid modulator valve or bore wear can result in excess or insufficient feed pressure to a variety of solenoids, adversely affecting shift functions.


Correction:

The Sonnax wear-resistant sleeve and valve corrects circuit pressure loss and restores control over solenoid modulator valve function.

The Aisin AW TF-80/81SC solenoid modulator valve establishes and controls feed pressure to a variety of solenoids. High or low solenoid feed pressure will adversely affect shift functions controlled by those solenoids. Wear at the inboard end of the solenoid modulator valve circuit causes excessive feed pressure. This floods the solenoids and reduces reaction time, resulting in harsh shifting and high line pressure. Wear at the outboard and mid-section reduces solenoid modulator pressure. This loss has the most effect on engagements and boost oil for line pressure rise. The Sonnax oversized solenoid modulator valve kit 39741-18K corrects wear in all areas, restoring pressure control and OE pressure calibration. This kit can be used in either of two valve body locations. The hardcoat anodized valve with annular groves and lengthened front spool combined with a wear resistant sleeve offer precision control and extended service life.

  • Aluminum valve is hardcoat anodized to reduce wear and has added annular grooves for better centering in the bore.
  • The highly wear-resistant sleeve and lengthened front valve spool provide 75% more sealing contact area

Required Tools

You need this if...

A vacuum test at the ports indicated fail to hold at least 18 in-Hg

  • 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.