F025 Tech Install

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FNR5, FN5A-EL

Remanufactured

Valve Body

Part No.

F025

Figure 1

NOTE: 1-2 Accumulator springs

have

a larger coil diameter and are generally

shorter than the N-D accumulator

springs. Springs go in the case rst

then are followed by the piston.

1-2 Accumulator

N-D Accumulator

Valve Body Installation Tips

1. Verify Case

a. Verify two rubber seals are installed

on the top of the valve body. Verify

accumulator springs and pistons are

installed into case correctly (Figure

1). Install valve body onto transmis-

sion case while indexing the manual

valve link into the manual linkage.

b. Install the 13 valve body-to-case

bolts in the noted locations

(Figure 2).

Torque them in the sequence shown, this can help prevent valve bind.

c. See ground strap bolt location (Figure 2) and refer to chart (Figure 3) for connector

color and wire color identication as the internal wire harness connectors can be incor-

rectly installed.

d. Verify the ve seals are installed in the mating surface for the secondary valve body.

Torque the 3 bolts (Figure 2).

NOTE: The green circle is the location for the ground strap from the wiring harness.

2. Fluid Fill and Road Test

a. Fill the transmission to factory spec with OE compatible ATF.

b. Let engine run to help warm transmission uid to 185°.

FNR5 Main

Valve Body

FNR5

Secondary

Valve Body

Figure 2

SSA

PWM

SSB

PWM

SSD

PCA

PWM

SSE

4

3

2

1

Ground

Strap Bolt

Location

5

6

7

8

9

10

11 12

= 40mm long valve body-to-case bolts

Torque all bolts to

80 in-lb in the sequence

shown; starting with 1.

= 71mm long valve body-to-case bolts

SSC

PWM

14

13

Secondary

Valve Body

Main

Valve Body

Ground

Strap Bolt

Location

= Bolts

Torque all bolts

to 80 in-lb

.

SSF

PCB

PWM

©2018 Sonnax Transmission Company, Inc. • A Marmon / Berkshire Hathaway Company F025_TechInstall 06-27-18

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

REMANUFACTURED VALVE BODIES

Tech & Install Tips

Solenoid Resistance Chart & Wire Harness Information

Transaxle Main

Case Connector

Terminals Solenoid Ohms Resistance

at 20 C (70 F)

Harness

Connector Color

Common Wire

Color(s)

Main ValVe Body

6 & Gnd. Shift Solenoid "D" (PWM) 10.9 – 26.2 Clear White

8 & Gnd. Shift Solenoid "E" (PWM) 10.9 – 26.2 Black Red

3 & Gnd. Shift Solenoid "A" (On-Off) 1.0 – 4.2 White Blue/Green

9 & Gnd. Shift Solenoid "B" (On-Off) 1.0 – 4.2 Blue Blue/Brown

1 & Gnd. Shift Solenoid "C" (PWM) 1.0 – 4.2 Green Black/Green

2 & 7 PC A Solenoid (PWM) 2.4 – 7.3 Black Orange/Blue

Secondary ValVe Body

10 & Gnd. Shift Solenoid "F" (On-Off) 10.9 – 26.2 Black Black

11 & Gnd. PC B Solenoid (PWM) 1.0 – 4.2 White Blue/Green

NOTE: When ohm testing solenoids, ground meter to valve body or case.

FNR5 Application Chart

Gear Range Forward

Clutch 2-4 Brake 3-4 Clutch Reverse

Clutch

Low/Rev

Clutch

Low One Way

Clutch

Direct Clutch

5th

Reduction

Brake & OWC

Park ON

Reverse ON ON ON

Neutral ON

D-1st Gear ON ON ON

D-2nd Gear ON ON ON

D-3rd Gear ON ON ON

D-4th Gear ON ON ON

D-5th Gear ON ON ON

Figure 5

Figure 3

Figure 4

Low & Reverse

Clutch

Servo

Release

Servo ApplyDirect ClutchReverse Clutch

Forward Clutch

2. Fluid Fill & Road Test (continued)

c.

Install capable scan tool to reset transmission

adaptives by resetting "Keep Alive Memory".

d.

Road test vehicle performing 10-15 upshift

and downshift cycles thru all ve speeds.

NOTE:

Downshift clunks can be common during

the relearn. This condition will typically resolve

itself within the 10-15 shift cycles.

3. Bonus Diagnostic Tech

a. is Sonnax remanufactured valve body

has been thru a rigorous inspection and

rebuild process, and then put thru a

comprehensive functional hydraulic and

electronic test to ensure it meets OE

performance and quality.

b. 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.

c. Following are common areas of failure

or root causes for symptoms that could

be attributed to valve body issues that

should also be examined or addressed

during your transmission build. In addi-

tion (Figures 4 & 5) for air test locations

to verify internal integrity, and a compo-

nent application chart for troubleshoot-

ing driveability issues.

4. Common Failure Areas

a. Forward engagement problems and 4-3

ares and torque converter slip codes can

be attributed to worn stator bushings.

Bushings should be checked and replaced.

b. A 2-3 are can be attributed to wear in

the case between the servo pin and the

bore. In addition the Direct clutch and

the sealing ring tower in the rear of the

case can cause the same issue.

c. A 1-3 shift can be caused by installing

the solenoid connectors backwards

.



















 

11

Transaxele Secondary Case Connector

©2018 Sonnax Transmission Company, Inc. • A Marmon / Berkshire Hathaway Company F025_TechInstall 06-27-18

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

FNR5, FN5A-EL F025

REMANUFACTURED VALVE BODIES

Tech & Install Tips