TOY181 Tech Install

: Sonnax Toy181-Tech-Install TOY181-Tech-Install 4170 instructions part uploads

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U151E, U151F, U250E

Remanufactured

Valve Body

(’04–’16)

Part Nos.

TOY181

TOY181-RMN

Valve Body Installation Tips

1. Verify Case Accumulator Pistons & Springs are Installed Correctly

Common spring colors:

• C2 (Closest to bell housing) = Yellow

• C3 (Middle) = Plain/No color

• B3 (Rear) = Purple (both inner and outer)

2. Air Check

While valve body is out, air-check indicated circuits (Figure 2) using low,

regulated air pressure. is will help you discover any issues prior to installing the

remanufactured valve body.

3. Install Valve Body onto Case

a. Install drain back checkball and spring into case, spring rst (Figure 2).

b. Verify B1 and B2 apply seals are in the case locations.

c. Align slot in manual valve with manual linkage.

d. Assemble valve body on case and torque bolts to 11 Nm or 8 ft-lb.

e.

Connect wire harness to solenoids and install temperature sensor (Figure 1). Assemble

bracket into temperature sensor slot and torque bolt to 6.6 Nm or 58 in-lb.

f. Install lter and three retaining bolts and torque to 11 Nm or 8 ft-lb.

g. Assemble pan gasket and pan onto transmission case and torque bolts to 7.8 Nm or

69 in-lb.

DSL

SL2

S4

SR

SL3 SLT SL1

Temperature

Sensor

Location

Solenoid Color

SL1 White & Black

SLT Green & Gray

SL3 Red & Blue

SR Purple

S4 Yellow

SL2 Green & Brown

DSL Light Blue

Common Internal Wire Colors

Figure 1

U151 Solenoid ID

©2018 Sonnax Transmission Company, Inc. • A Marmon / Berkshire Hathaway Company TOY181-TECH-INSTALL 07-25-18

866-243-8829 • 856-848-0908 • F: 856-848-1080 • www.sonnax.com Page 1

REMANUFACTURED VALVE BODIES

Tech & Install Tips

Valve Body Installation Tips (continued)

4. Fluid Fill & Road Test

a. Fill transmission with Toyota WS transmission uid to factory spec.

b. Let engine run to warm transmission uid to approximately 175°.

c. Install scan tool to verify transmission uid temp is achieved.

NOTE: This function must be done with a capable scan tool.

d. Reset transmission memory with capable scan tool. (Battery

disconnect will not reset.)

e. Road test vehicle performing 10–15 upshift and downshift

cycles through all ve speeds.

NOTE: A small 2-3 upshift are or overlap issue, clunk into 4th Gear and

a 3-2 downshift clunk is common during adaptive relearn. This condition

will typically resolve itself within the 10–15 shift cycles after reset is

performed.

Transmission Diagnostic Tips

is remanufactured valve body has been through a rigorous inspec-

tion and rebuild process, then a comprehensive, functional hydraulic

and electronic test to ensure it meets OE performance and quality. It

is designed to eliminate many pressure-, shift- and converter-related

complaints, but will not correct complaints that stem from other

areas of the transmission.

e following are common areas of failure or root causes for symp-

toms that could be attributed to valve body issues that should also

be examined or addressed during your transmission build. A brake

and clutch application chart (Figure 3) is below for additional aid in

diagnosing problems.

• 5-4 Downshift clunk can be caused by C1 clutch piston

debonding.

• 2-3 Upshift flare and or binding can be caused by sealing ring

problems in the rear cover.

• This can cause premature C0 clutch failure.

A bind-up during 2-3 upshift can be caused by bad speed sensors.

Shift quality complaints can also be caused by:

• Clutch and brake clearance issues

• Low battery voltage and poor battery grounds

• Bushing/bearing failure and overheat can be caused by case

bearings turning, evidenced by bits of aluminum debris in ATF.

NOTE: The case bearing has been known to spin out on high

mileage units, causing ne metal to build up which can hang

up solenoids and valve trains in the valve body.

Clutch & Brake Application Chart Figure 3

Gear Range

FWD

Clutch

C1

REV

Input

Clutch

C2

Direct

Clutch

C0

U/D

Clutch

C3

2nd

Brake

B1

L/R

Brake

B2

U/D

Brake

B3

No. 1

One-Way

Clutch

F1

No. 2

One-Way

Clutch

F2

Park ON

Reverse ON ON ON

Neutral ON

D-1st Gear ON ON ON ON

D-2nd Gear ON ON ON ON

D-3rd Gear ON ON ON ON

D-4th Gear ON ON ON ON

D-5th Gear ON ON ON

Figure 2

TOYOTA/LEXUX U150/U250

PRELIMINARY INFORMATION

SOLENOID INTERNAL HARNESS AND CONNECTOR I.D.

1

2

3

4

5

613

12

11

10

9

8

7

13 PIN

CONNECTOR

Terminal Function Internal wire color

1 THO (temp +) Orange

2SLT + Green

3 S4+ Yellow

4 SL3+ Red

5Sl2+ Green

6 SL1+ White

7 E2(temp-) Orange

8SLT- Grey

9 SR+ Purple

10 DSL+ Light Blue

11 SL3- Blue

12 SL2- Brown

13 SL1- Black

TCC Apply

B2 Clutch

1st Reverse

Pump

Pressure

TCC Release

Forward Clutch

Drain-Back

Check Valve

C3

Accumulator

Pump Suction

B3

Accumulator

B1 Clutch

2nd Brake

C3 UD Clutch

B3 UD

Brake

Clutch

C2 Reverse Clutch

Lube

C0 Direct Clutch

Lube Pressure

C2 Accumulator

Air Check Locations and Identiers

©2018 Sonnax Transmission Company, Inc. • A Marmon / Berkshire Hathaway Company TOY181-TECH-INSTALL 07-25-18

866-243-8829 • 856-848-0908 • F: 856-848-1080 • www.sonnax.com Page 2

U151E, U151F, U250E VALVE BODY TOY181, TOY181-RMN

REMANUFACTURED VALVE BODIES

Tech & Install Tips