4R44E 5R55E Vac Interactive

2017-05-04

: Sonnax 4R44E-5R55E-Vac Interactive 4R44E-5R55E-Vac_Interactive 430 file tech_resource uploads

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FORD 4R44E-5R55E

Zip Kit® 4R44E-5R55E-ZIP Available for this unit.

TIME TESTED • INDUSTRY TRUSTED

Critical Wear Areas & Vacuum Test Locations
NOTE: OE valves are shown in rest position and should be tested in rest position unless otherwise indicated. Test locations are pointed
to with an arrow. Springs are not shown for visual clarity. Low vacuum reading indicates wear and Sonnax parts noted for replacement.
For specific vacuum test information, refer to individual part instructions included in kits and available at www.sonnax.com.

20

15

10

25

5

0
30
VACUUM
TEST

Click on Sonnax part numbers to see more information.
Boost Valve Assembly

Pressure Regulator Valve
•	Delayed engagement due to poor converter fill
•	High/Low line pressure
•	Low cooler flow at idle
•	Overheated converters
Replace with Sonnax Part No.
37947-05K Requires 37947-TL5

•	Soft shifts
•	Delayed Reverse
•	Low line pressure
•	Poor modulator control
Replace with Sonnax Part No.
37947-01K OE Ratio
37947-03K Increased Ratio

EPC Boost Valve,
Forward Modulator Valve
& Reverse Modulator Valve
•	Poor shift quality
•	Delayed Forward/no Reverse
•	2nd Gear starts
Replace with Sonnax Part No.
37947-11K Requires 37947-TL11

TCC Modulator Valve
•	No TCC apply
•	Code 1741
•	Low cooler flow
•	Poor converter fill & delayed engagements
•	Engine stall on Forward engagement

To vacuum test this port: invert
valve and prop outboard with a
Torlon checkball.

Replace with Sonnax Part No.
37947-07K Requires 37947-TL5

©2017 Sonnax Industries, Inc.
800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com

4R44E-5R55E-Vac-Locations 05-04-17
Page 1

FORD 4R44E-5R55E

Zip Kit® 4R44E-5R55E-ZIP Available for this unit.

TIME TESTED • INDUSTRY TRUSTED

OE Valve Body Exploded View
Valve Body Descriptions

I.D. No.

Description

101

Forward Engagement
Control Valve

102

Boost Valve Assembly
& Pressure Regulator Valve

103

EPC Boost Valve
& Forward Modulator Valve

104

Manual Valve

105

Reverse Modulation Valves

106

2-3 or 3-4 Shift Valve

107

1-2 or 2-3 Shift Valve

108

Solenoid Regulator Valve

109

Coast Clutch Valve
& Converter Regulator Valve

110

Converter Clutch
Modulator Valve

111

Cooler Limit Valve, Bypass Valve
& Thermostat Bypass Valve

112

3-4 or 1-2 & 4-5 Shift Valve

113

Throttle Downshift Control Valve

114

Manual Low Valve

115

Kick Downshift Control Valve

102

103

104
101

115

105

114

106
113

107
108
112

110

109

111

©2017 Sonnax Industries, Inc.
800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com

4R44E-5R55E-Vac-Locations 05-04-17
Page 2



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