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Transmission Valve Kit Solution

The document summarizes a solenoid modulator valve kit that corrects issues in Aisin AW TF-80/81SC transmissions. Complaints include slippage, harsh shifting, and line pressure problems caused by wear in the solenoid modulator valve bore. The Sonnax kit includes an oversized valve with a wear-resistant sleeve to restore proper control of solenoid feed pressure and shift functions. It can be used in two locations in the valve bodies to address wear issues and improve transmission performance and service life.

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ramon barona
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218 views1 page

Transmission Valve Kit Solution

The document summarizes a solenoid modulator valve kit that corrects issues in Aisin AW TF-80/81SC transmissions. Complaints include slippage, harsh shifting, and line pressure problems caused by wear in the solenoid modulator valve bore. The Sonnax kit includes an oversized valve with a wear-resistant sleeve to restore proper control of solenoid feed pressure and shift functions. It can be used in two locations in the valve bodies to address wear issues and improve transmission performance and service life.

Uploaded by

ramon barona
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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t r a n sm ission P art s Part Summar y

Complaints Cause Correction


• DTC's P0734, P0735 or P0729 Solenoid modulator valve or bore wear can result in The Sonnax wear-resistant sleeve and
• Slippage or shock on kickdown excess or insufficient feed pressure to a variety of sole- valve corrects circuit pressure loss and
noids, adversely affecting shift functions. restores control over solenoid modula-
• Slippage in steady driving 4, 5 or
tor valve function.
6th gear

Aisin AW TF-80/81SC
Oversized Solenoid AW TF-80SC AW TF-81SC
Modulator Valve Kit TOOL
Main Accumulator Casting Rear Cover

Part No. R

39741-18K
EQ
D

UIRE

• Solenoid Modulator Valve


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

NOTE: Can be used in either of 2 locations


in both valve bodies.
Fits Volvo (AM6); Opel (AF40); Peugeot
(TF80); Saab (Af40/6); Land Rover (TF80);
Ford (AF21) and Mazda (AW6A-EL). Solenoid Modulator Sleeve

Solenoid Modulator Valve


Tool Kit
Spring
Tool Kit End Plug (TF-81SC only)

Part No.
The Aisin AW TF-80/81SC solenoid modulator valve establishes and controls feed pressure to a
f-39741-tl18 variety of solenoids. High or low solenoid feed pressure will adversely affect shift functions controlled
• Reamer by those solenoids. Wear at the inboard end of the solenoid modulator valve circuit causes excessive
• Guide Pin 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.
• Reamer Jig
This loss has the most effect on engagements and boost oil for line pressure rise.
Note: Sonnax “F-Tool” kits designed to
service a specific bore require the VB-FIX, The Sonnax oversized solenoid modulator valve kit 39741-18K corrects wear in all areas, restoring
a self-aligning valve body reaming fixture. pressure control and OE pressure calibration. This kit can be used in either of two valve body loca-
More information and instructions can be tions. The hardcoat anodized valve with annular groves and lengthened front spool combined with
found online at www.sonnax.com. a wear resistant sleeve offer precision control and extended service life.

Features & Benefits 15


TF-81SC Rear
• Aluminum valve is hardcoat
20 10
25 5
30 0 Cover Valve Body
anodized to reduce wear and has VACUUM
TEST

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
Visual Wear
You need this if… Feeds PCA, Feeds SSA, SSB,
A vacuum test at the ports indi- SSD/C1 and SSC/C3, SSE/B1,
cated fail to hold at least 18 in-Hg. TCC Solenoids SSF/C2 Solenoids

©2012 Sonnax Industries, Inc. 39741-18K 07-13-12


800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com

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