Critical Wear Areas and Vacuum Test Locations AW55-50SN

Front Control Valve Body Rear Side

Solenoid Modulator Valve • Loss of 3rd, 4th and 5th gear • No TCC apply • Low line pressure • Delayed forward • 2-3 flare upshifts • 5th gear only

Forward Clutch (C1) Control Valve • Harsh shifts neutral to drive

Neutral Relay Valve • No neutral control • No drive • Slips in drive

Second Coast Clutch (B1) Control Valve • Harsh 2-3 and 3-4 shifts • 3-2 coastdown clunk

Sonnax Industries, Inc. 1 Automatic Drive • P.O. Box 440 • Bellows Falls, VT 05101-0440 USA (800) 843-2600 • (802) 463-9722 • fax (802) 463-4059 • www.sonnax.com

©Sonnax2011

Critical Wear Areas and Vacuum Test Locations AW55-50SN

Middle Control Valve Body Front Side

Solenoid Relay Valve and Plunger/Sleeve Assembly • No TCC apply • Shift concerns • Harsh shifts in all ranges • Engine stall during engagement • No upshifts after 2nd or flare on

2-3 shift • B5 clutch distress

U1 Shift Valve • No 1st and 2nd • Slips in 2nd, 3rd, 4th and 5th • No 3rd, 4th and 5th • No engine braking in 2nd,

3rd and 4th

M1 Shift Valve • No reverse • No 2nd, 3rd, 4th and 5th gear • No 1st

U2 Shift Valve • No 1st, 2nd and 3rd gear • No 4th and 5th gear

3rd Gear Band (B4) Release Valve • 2-3, 3-2 shift concern • 3-2 neutral • Harsh 3-2 coast downshift • 2-3 flare • 2-3 neutral

Main Pressure Regulator Valve and Boost Valve Assembly • Harsh or soft shifts • Delayed engagements • Converter apply/release problems • Late shifts • Reverse slips

Seal the port on opposite side of casting when testing this location.

Sonnax Industries, Inc. 1 Automatic Drive • P.O. Box 440 • Bellows Falls, VT 05101-0440 USA (800) 843-2600 • (802) 463-9722 • fax (802) 463-4059 • www.sonnax.com

©Sonnax2011

Critical Wear Areas and Vacuum Test Locations AW55-50SN

Middle Control Valve Body Rear Side

3rd Gear Band (B4) Release Valve • 2-3, 3-2 shift concern • 3-2 neutral • Harsh 3-2 coast downshift • 2-3 flare • 2-3 neutral

Main Pressure Regulator Valve and Boost Valve Assembly • Harsh or soft shifts • Delayed engagements • Converter apply/release problems • Late shifts • Reverse slips

Seal the port on opposite side of casting when testing this location.

Sonnax Industries, Inc. 1 Automatic Drive • P.O. Box 440 • Bellows Falls, VT 05101-0440 USA (800) 843-2600 • (802) 463-9722 • fax (802) 463-4059 • www.sonnax.com

©Sonnax2011

Critical Wear Areas and Vacuum Test Locations AW55-50SN

Rear Control Valve Body Front Side

Shift Pressure Relay Valve • Slips in reverse • No engine braking in

2nd, 3rd and 4th gear

M2 Shift Valve • No reverse • No 1st gear • No 2nd, 3rd, 4th and

neutral control

Lockup Relay Valve • TCC apply/release problems • Inadequate lubrication • Converter codes

Secondary Regulator Valve • Overheated fluids • Overheated/damaged bushings

and converter • Harsh reverse engagement • TCC slippage / RPM surge • Poor shift quality • High/low SLT pressure

Line Pressure Control (SLT) Accumulator Assembly • Delayed forward

engagement • Low line pressure • Flare 2-3 upshift • Harsh shifts • Erratic SLT pressure

Seal the port on opposite side of casting when testing this location.

Sonnax Industries, Inc. 1 Automatic Drive • P.O. Box 440 • Bellows Falls, VT 05101-0440 USA (800) 843-2600 • (802) 463-9722 • fax (802) 463-4059 • www.sonnax.com

©Sonnax2011

Critical Wear Areas and Vacuum Test Locations AW55-50SN

Rear Control Valve Body Rear Side

Seal the port on opposite side of casting when testing this location.

Lockup Relay Valve • TCC apply/release problems • Inadequate lubrication • Converter codes

3rd Gear Band (B4) Control Valve • Harsh 3-4 and 4-3 shifts

Sonnax Industries, Inc. 1 Automatic Drive • P.O. Box 440 • Bellows Falls, VT 05101-0440 USA (800) 843-2600 • (802) 463-9722 • fax (802) 463-4059 • www.sonnax.com

©Sonnax2011

Critical Wear Areas and Vacuum Test Locations AW55-50SN

No. 2 Rear Control Valve Body Front Side

Second Clutch (B2) Control Valve • 2nd gear slips

Reverse Shift Restrict Ball Check Valve #9 • 2-3 shift flares • Burned 3rd gear band WAT for cross leaks. Should have one way flow only.

Lockup Control Valve and Sleeve/Plunger Assembly • TCC apply/release problems • Converter codes • Burned converters

Sonnax Industries, Inc. 1 Automatic Drive • P.O. Box 440 • Bellows Falls, VT 05101-0440 USA (800) 843-2600 • (802) 463-9722 • fax (802) 463-4059 • www.sonnax.com

©Sonnax2011

AW55-50SN Front Control Valve Body

Front Side

101

102

103

104

Sonnax Industries, Inc. 1 Automatic Drive • P.O. Box 440 • Bellows Falls, VT 05101-0440 USA (800) 843-2600 • (802) 463-9722 • fax (802) 463-4059 • www.sonnax.com

©Sonnax2011

AW55-50SN Front Control Valve Body

Rear Side

101

102

103

104

Sonnax Industries, Inc. 1 Automatic Drive • P.O. Box 440 • Bellows Falls, VT 05101-0440 USA (800) 843-2600 • (802) 463-9722 • fax (802) 463-4059 • www.sonnax.com

©Sonnax2011

AW55-50SN Middle Control Valve Body

Front Side

208

207

201

202

203204

205

206

Sonnax Industries, Inc. 1 Automatic Drive • P.O. Box 440 • Bellows Falls, VT 05101-0440 USA (800) 843-2600 • (802) 463-9722 • fax (802) 463-4059 • www.sonnax.com

©Sonnax2011

AW55-50SN Middle Control Valve Body

Rear Side

201

202

203

204

205

206

207

208

Sonnax Industries, Inc. 1 Automatic Drive • P.O. Box 440 • Bellows Falls, VT 05101-0440 USA (800) 843-2600 • (802) 463-9722 • fax (802) 463-4059 • www.sonnax.com

©Sonnax2011

AW55-50SN Rear Control Valve Body

Front Side

308

307* 301

302

303

304

305

306

* some units have an inboard spring at this valve

Sonnax Industries, Inc. 1 Automatic Drive • P.O. Box 440 • Bellows Falls, VT 05101-0440 USA (800) 843-2600 • (802) 463-9722 • fax (802) 463-4059 • www.sonnax.com

©Sonnax2011

AW55-50SN Rear Control Valve Body

Rear Side

301

302

303

304

305

306

308

307*

* some units have an inboard spring at this valve

Sonnax Industries, Inc. 1 Automatic Drive • P.O. Box 440 • Bellows Falls, VT 05101-0440 USA (800) 843-2600 • (802) 463-9722 • fax (802) 463-4059 • www.sonnax.com

©Sonnax2011

AW55-50SN No. 2 Rear Control Valve Body

Front Side

403

401

402

Sonnax Industries, Inc. 1 Automatic Drive • P.O. Box 440 • Bellows Falls, VT 05101-0440 USA (800) 843-2600 • (802) 463-9722 • fax (802) 463-4059 • www.sonnax.com

©Sonnax2011

AW55-50SN No. 2 Rear Control Valve Body

Rear Side

403

401

402

Sonnax Industries, Inc. 1 Automatic Drive • P.O. Box 440 • Bellows Falls, VT 05101-0440 USA (800) 843-2600 • (802) 463-9722 • fax (802) 463-4059 • www.sonnax.com

©Sonnax2011

Number Location Description101 Front Control Valve Body Forward Clutch (C1) Control Valve102 Front Control Valve Body Neutral Relay Valve103 Front Control Valve Body 2nd Coast Clutch (B1) Control Valve104 Front Control Valve Body Solenoid Modulator Valve

201 Middle Control Valve Body Manual Valve202 Middle Control Valve Body 3rd Gear Band (B4) Release Valve203 Middle Control Valve Body U1 Shift Valve204 Middle Control Valve Body M1 Shift Valve205 Middle Control Valve Body U2 Shift Valve206 Middle Control Valve Body Primary Regulator Valve and Plunger Valve/Sleeve Assembly207 Middle Control Valve Body Reverse Shift Ball Check Valve208 Middle Control Valve Body Solenoid Relay Valve and Plunger Valve/Sleeve Assembly

301 Rear Control Valve Body 3rd Gear Band (B4) Control Valve302 Rear Control Valve Body Shift Pressure Relay Valve303 Rear Control Valve Body M2 hift Valve304 Rear Control Valve Body Shift Pressure Control Valve and Plunger Valve/Sleeve Assembly305 Rear Control Valve Body Secondary Regulator Valve306 Rear Control Valve Body Line Pressure Control (SLT) Accumulator Piston307 Rear Control Valve Body 1-2 Reverse Clutch (B5) Control Valve308 Rear Control Valve Body Lockup Relay valve and Plunger Valve/Sleeve Assembly

401 No. 2 Rear Control Valve Body Lockup Control Valve and Plunger Valve/Sleeve Assembly402 No. 2 Rear Control Valve Body Reverse Shift Restrict Ball Check Valve403 No. 2 Rear Control Valve Body 2nd Clutch (B2) Control Valve

AW55-50SN Component Description and Location

Sonnax Industries, Inc. 1 Automatic Drive • P.O. Box 440 • Bellows Falls, VT 05101-0440 USA (800) 843-2600 • (802) 463-9722 • fax (802) 463-4059 • www.sonnax.com

©Sonnax2011