U760E Vac Interactive

: Sonnax U760E Vac Interactive U760E_Vac_Interactive 641 file tech_resource uploads

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©2017 Sonnax Industries, Inc. U760E_VacTestGuide 10-26-17

800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com Page 1

Toyota/Lexus U760E, U760F

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.

20

25

15

0

10

5

30

VACUUM

TEST

20

25

15

0

10

5

30

VACUUM

TEST

Click on Sonnax part numbers to see more information.

B3 Accumulator Piston

• Harsh Reverse engagement

• Harsh 2-3 or 4-5 shift

• Burnt B3 brake

Replace with Sonnax Part No.

47740-11K

B2 Accumulator Piston

• Harsh Reverse engagement

• Burnt B2 brake

Replace with Sonnax Part No.

47740-11K

C2 Accumulator Piston

• Harsh 3-4 shift

• Burnt C2 clutch

Replace with Sonnax Part No.

47740-11K



Upper Valve Body • U760E Shown

Secondary Pressure

Regulator Valve

• Overheated transmission

• Bushing/Bearing failures

• Lube-related failures

Replace with Sonnax Part No.

47740-26K Requires F-47740-TL26 & VB-FIX

End Plugs

• Loss of critical line & SLT pressures

• Shift complaints

• Burnt clutches & brakes

Replace with Sonnax Part No.

47740-21K

NOTE: Several Locations =

B1 Accumulator Piston

• Harsh 1-2 or 5-6 shift

• Burnt B1 brake

Replace with Sonnax Part No.

47740-11K

Lockup Control Boost

Assembly

• Converter apply/release concerns

• Converter codes; P2757, P0741

• Overheated transmission

Replace with Sonnax Part No.

47740-06K



Lockup Relay Valve

• Converter apply/release concerns

• Converter codes; P0741

• Overheated transmission

Reverse Sequence

Valve

• Delayed Reverse engagement

• Low Reverse pressure

• Burnt B2 or B3 brake

Lockup Control Valve

• Converter apply/release concerns

• Converter codes; P2757, P0741

• Overheated transmission

Replace with Sonnax Part No.

47740-30K Requires F-47740-TL30 & VB-FIX

Test: Test each port with valve blocked

outboard .125" with OE retainer.

C1 Accumulator Piston

• Harsh/Delayed Forward

engagement

• Burnt C1 clutch

Replace with Sonnax Part No.

47740-12K

Test: Test this port with valve blocked

inboard .125" with OE retainer.

Test: Test this port with valve blocked

outboard .125" with OE retainer and sealing

port on back with thumb.

©2017 Sonnax Industries, Inc. U760E_VacTestGuide 10-26-17

800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com Page 2

Toyota/Lexus U760E, U760F

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.

20

25

15

0

10

5

30

VACUUM

TEST

20

25

15

0

10

5

30

VACUUM

TEST







Middle Valve Body – Back Side

U760E Shown

Middle Valve Body – Lower Side

U760E Shown

Note: Seal when

testing B2 apply

control valve.**

Note: Seal when

testing pressure

regulator valve.

Note: Seal when

testing B1 apply

control valve.

Note: Seal when

testing B1 apply

boost assembly.

Reverse Boost

Assembly

• Delayed Reverse

• Low line pressure in Reverse

• Burnt B2 & C3 brakes

Replace with Sonnax Part No.

47740-38K



B1 Apply Boost Assembly

• 1-2 & 5-6 Shift complaints

• Burnt B1 brake

Replace with Sonnax Part No.

47740-40K Test: Block this port and

port on back when testing.

Test: Test this port

with valve blocked

inboard .218" dia.

checkball.

Primary Pressure

Regulator Valve

• High/Low line pressure

• Harsh/Soft shifts

• Burnt clutches/brakes

Replace with Sonnax Part No.

47740-02K Requires F-47740-TL2 & VB-FIX

Note: Seal

port on back

when testing.

Sequence Valve

• Shift complaints

• Burnt clutches/brakes

Solenoid Modulator

Valve

• Shift complaints • Solenoid codes

• TCC slip • Loss of control pressures

Replace with Sonnax Part No.

47740-25K Requires F-47740-TL24 & VB-FIX

B2 Control Valve

• Delayed Reverse

• Burnt B2 brake

Replace with Sonnax Part No.

47740-35K Requires F-47740-TL35 & VB-FIX



B2 Apply

Control Valve

• Delayed Reverse

• Burnt B2 brake

Replace with Sonnax Part No.

47740-27K Requires F-47740-TL27 & VB-FIX

Test: Test this port and port on back

when testing B2 Apply Control Valve.**

** These two passages are connected. The mat

will provide the seal for the Middle Valve Body,

Upper side. The passage indicated (**) will also

need to be sealed to Vacuum test the circuit.

Note: Seal port on

back when testing.**

Clutch Control Valve

• 4-5 Flare/Harsh

• Delayed Reverse

Replace with Sonnax Part No.

47740-22K

Requires F-47740-TL22 & VB-FIX

C2 Clutch Apply

Control Valve

• Slipping 4th, 5th, 6th gear

• Burnt C2 clutch

B1 Apply Control Valve

• 1-2 Long slide • Clutch failure

• B1 brake clutches burned

Replace with Sonnax Part No.

47740-44K Requires F-47740-TL44 & VB-FIX

Click on Sonnax part numbers to see more information.

©2017 Sonnax Industries, Inc. U760E_VacTestGuide 10-26-17

800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com Page 3

Toyota/Lexus U760E, U760F

TIME TESTED • INDUSTRY TRUSTED

OE Exploded View

Upper Valve Body • U760E Shown

NOTE: Depending upon vehicle application, the OE springs shown may not be present.

108

107

106

109

105

104

111

110

103

102

101

.393" dia. Checkballs

Upper Valve Body Descriptions

I.D. No. Description

101 Lockup Control Valve (inboard)

Lockup Control Boost Assembly (outboard)

102 Lockup Relay Valve

103 Reverse Sequence Valve

104 Secondary Pressure Regulator Valve

105 B3 Accumulator Piston

106 B1 Accumulator Piston

107 B2 Accumulator Piston

108 C1 Accumulator Piston

109 C2 Accumulator Piston

110 Lube Relief Check Valve

111 Converter Relief Check Valve

.218" dia. Checkball

Plastic Check Valve

©2017 Sonnax Industries, Inc. U760E_VacTestGuide 10-26-17

800-843-2600 • 802-463-9722 • F: 802-463-4059 • www.sonnax.com Page 4

Toyota/Lexus U760E, U760F

TIME TESTED • INDUSTRY TRUSTED

209

208

207

206

205

204

203

202

201

Filter

Filter

.218" dia.

Checkball

.393" dia. Checkballs

.393" dia.

Checkballs

Line Pressure

Blow-Off

Checkvalve

& Spring

OE Exploded View

Middle Valve Body • U760E Shown

NOTE: Depending upon vehicle application, the OE springs shown may not be present.

Middle Valve Body Descriptions

ID No. Description

201 B1 Apply Control Valve (inboard)

B1 Apply Boost Assembly (outboard)

202 Primary Pressure Regulator Valve (inboard)

Reverse Boost Assembly (outboard)

203 Sequence Valve

204 Clutch Control Valve

205 C2 Clutch Apply Control Valve

Middle Valve Body Descriptions

ID No. Description

206 B2 Apply Control Relay Valve (inboard)

B2 Apply Control Valve (outboard)

207 B2 Control Valve (inboard)

B2 Control Relay Valve (outboard)

208 Manual Valve

209 Solenoid Modulator Valve