SC AODE 4R75E IN

2017-09-15

: Sonnax Sc-Aode-4R75E-In SC-AODE-4R75E-IN 4472 instructions part uploads

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4R70E, 4R70W, 4R75E, 4R75W, AODE
SURE CURE KIT
PART NUMBER SC-AODE-4R75E

INSTRUCTION BOOKLET

Parts are labeled here in order of installation. See other side of sheet for details on Sure Cure kit contents.
See Sure Cure instruction booklet for detailed installation steps.

VALve Body install Diagram

5
4
8
A

B
To ensure bypass/TCC system
has full control, drill "A" & "B"
holes out to .062".

7
Eight checkballs to
install, see locations
on valve body.

Reference page 3 in
technical booklet.

13
11

12
See Technical booklet for installation details during overhaul.

SC-AODE-4R75E-IN 09-15-17
Page 1

TIME TESTED • INDUSTRY TRUSTED

4R70E, 4R70W, 4R75E, 4R75W, AODE SURE CURE KIT

Instruction Booklet

Sure Cure Contents & Installation Steps
Step 1 Ream Main Pressure
Regulator Valve Bore

Step 7 Install Oversized Solenoid
Regulator Valve & Spring
Packaging Pocket 5

Step 2 R
eam Solenoid Regulator
Valve Bore
PART INSTALLATION: To implement best practices and avoid chip
contamination, wait until all valve body reaming operations are finished
before installing Sonnax products. Detailed installation instructions are
explained later in this booklet.
F-TOOL REAMING: Visit Sonnax web site www.sonnax.com for general F-Tool reaming fixture instructions, as well as best practices for bore
preparation, cautions and suggestions on bore reaming.

Step 3 Install Oversized Main PR
Valve, Oversized Boost
Valve & Sleeve

• Valve • Spring

Step 8 R
eplace Overdrive Servo
Regulator Valve & Sleeve

NOTE: '01–Later applications only.

Remove OE clip and save for reuse. Remove and discard OE overdrive
servo regulator valve and sleeve.
NOTE: Remove the inboard overdrive servo regulator valve and ensure
that it is free in its bore. The inboard valve is commonly stuck as OD
servo retaining ring often breaks and pieces of the snap ring lodge in
this bore.
Packaging Pocket 6

• Valve • Sleeve

Reuse OE Spring. Reference page 4 for detailed instructions.
Packaging Pocket 1

Step 9 Replace OE Checkballs

• Oversized Main PR Valve • Boost Valve • Boost Sleeve

Refer to page 1 for locations.
Packaging Pocket 7

Step 4 Replace Bypass Clutch
Control Valve Plunger,
Sleeve & Spring
Packaging Pocket 2

• Plunger • Sleeve • Spring

Step 5 P
erform Separator Plate
Modifications

• Checkballs (8)

10 Install Valve Body
Step
Retainer Plate

NOTE: Used on '01–later applications only. Installation requires
drilling of separator plate and valve body casting so it can be
threaded. Reference page 6 for detailed instructions.

Packaging Pocket 8

• Retainer Plate • Gasket • Bolts (2)

Packaging Pocket 3

• Drill bit, .062" (not shown)

Step 6 Replace 2-3 Shift Valve
End Plug
Remove OE clip and save for reuse. Remove and discard OE 2-3 shift
valve end plug. Install O-ring on Sonnax end plug in shallow groove.
Lubricate with Sonnax O-Lube or equivalent, roll on bench to size.
Install O-ringed plug into bore, O-ringed land first. Reinstall OE clip.
Packaging Pocket 4

• Plug • O-Rings (2) 1 extra

09-15-17 SC-AODE-4R75E-IN
Page 2

4R70E, 4R70W, 4R75E, 4R75W, AODE SURE CURE KIT

Instruction Booklet

TIME TESTED • INDUSTRY TRUSTED

Sure Cure Steps During Transmission Overhaul
Step 11 Install Intermediate Clutch
Spiral Retaining Ring
Reference page 6 for detailed instructions.
Packaging Pocket 9

• Spiral Retaining Ring • Locking Ring

Step 12 Replace Output Shaft Seals.
Inspect Direct Piston &
Direct Clutch Drum.
Reference page 7 for detailed instructions.
Packaging Pocket 10

• Output Shaft Seals (2)

Step 13 Install Pump Cover &
Input Shaft Seals

NOTE: There are 2 types of rings for the stator
'02-Earlier and '03-Later.

Reference page 7 for detailed instructions.
Packaging Pocket 11

• Pump Cover Seals; Early (2), Late (2) • Input Shaft Seals (2)

Step 14 Replace Overdrive Servo Pin
Reference page 8 for detailed instructions.
Packaging Pocket 12

• Servo Pin • O-Rings; Large (1), Medium (1)

SC-AODE-4R75E-IN 09-15-17
Page 3

4R70E, 4R70W, 4R75E, 4R75W, AODE
SURE CURE KIT
PART NUMBER SC-AODE-4R75E

INSTRUCTION BOOKLET

Valve Body Verification

Verify that this kit fits your valve body. Rough forging
must begin with RF-F6 or 1L3P located below stiffener plate (Figure 1). This kit fits '96–later units. It will
NOT work on '91–'95 units.
Figure 1

Pressure
Regulator
Valve
AODE
Valve Body

Figure 2

76948-BST

OE
Spring
Boost
Valve

Tool Kit
F-76948-TL
Requires
VB-FIX

Boost
Sleeve

Tool Kit: 76948-TL4
Does not require VB-FIX

Step 1 Ream Pressure Regulator
Valve Bore (Figure 2)
Figure 3

Figure 4

1. Disassembly

a. Remove OE retainer and save for reuse.
b. Remove and discard OE boost valve and sleeve.
c. Remove OE pressure regulator valve spring and
save for reuse.

Valve

d. Remove and discard OE pressure regulator valve.

4R70W
Valve Body

2. Ream Bore

Spring

NOTE: This bore requires the use of tool kit
76948-TL4 or tool kit F-76948-TL and the
alignment fixture VB-FIX (not included in this kit).

NOTE: Sonnax 76948-BST can be used if necesary to
ensure that the pressure regulator valve moves freely.
NOTE: The oversized valve in this kit will also service the
split spool design shown (Figure 3).

Sonnax PR valve replaces
both OE valve styles
found in '96-later units.

Tool KIt

Figure 5

NOTE: Do not install valves at this time. Wait until all reaming operations are finished.

Step 2 Ream Solenoid Regulator
Valve Bore (Figure 4)
1. Disassembly
a. Remove OE retainer and save for reuse.
b. Remove and discard OE spring and solenoid regulator valve.

2. Reaming Bore

NOTE: This bore requires the use of tool kit F-76948-TL47 and the alignment
fixture VB-FIX (not included in this kit).

09-15-17 SC-AODE-4R75E-IN
Page 4

Line on back of sleeve
indicates the two orifice
hole locations, placed at
3 & 9 o’clock position.

4R70E, 4R70W, 4R75E, 4R75W, AODE SURE CURE KIT

Step 3 Install Oversized Main
Pressure Regulator Valve,
OE Spring & Oversized
Boost Valve & Sleeve

Instruction Booklet

TIME TESTED • INDUSTRY TRUSTED

Step 8 Replace
Overdrive Servo
Regulator Valve
& Sleeve

a. Install Sonnax oversized main pressure regulator valve, smaller diameter first.
b. Reinstall OE pressure regulator valve spring.

NOTE: The small OE boost spring was eliminated in later applications and is not

required. If your application originally had the spring, it may be reinstalled into the

Sonnax boost assembly if desired. Use of the spring will provide slightly
quicker Reverse line rise pressure.

c. Install Sonnax boost valve assembly into bore, ensuring sleeve snout enters
OE spring I.D.
d. Reinstall OE retainer.

Step 4 Replace Bypass Clutch
Control Valve Plunger,
Sleeve & Spring (Figure 5)
a. Remove OE clip and set aside for reuse.
b. Remove and discard OE plunger sleeve, plunger valve and spring.
c. Remove plunger valve from Sonnax sleeve, set aside for reuse.
d. With enclosed Sonnax drill bit, drill thru existing Sonnax sleeve cross-orifice
hole and out other side of sleeve. Remove debris and burrs. Reinstall Sonnax
plunger into sleeve.
e. Install Sonnax orange spring and plunger valve and sleeve assembly into
bore and draw a line on the back of the sleeve indicating the two orifice hole
locations and place at the 3 and 9 o'clock position(Figure 5).
f. Reinstall OE clip.

Step 9 Replace OE
Checkballs
Step 10 Install Valve
Body Retainer
Plate Kit (Figure 6)
1. Tools Required
• 13/64" or #9 sharp
drill bit
• 1/4" and 5/16"
drill bits
• 6.0mm x 1.0mm
thread tap

Retainer plate,
gasket
and bolts.

2. Installation &
Assembly
a. Install the separator
plate onto the valve
body and align the
plate with the original alignment bolts.

Step 5 Perform Separator Plate
Modifications
Step 6 Replace 2-3 Shift Valve
End Plug

Figure 6

Figure 7

2 Cast in-place
bolt holes

Step 7 Install Oversized Solenoid
Regulator Valve (Figure 4)
a. Ensure valve bore and body are clean and clear of debris.
b. Install Sonnax valve, longer spool end pointed inward.
c. Install Sonnax spring, ensuring it seats over outboard valve stem.
d. Compress spring and reinstall OE retainer.

Underside of 4R70W Valve Body

SC-AODE-4R75E-IN 09-15-17
Page 5

TIME TESTED • INDUSTRY TRUSTED

4R70E, 4R70W, 4R75E, 4R75W, AODE SURE CURE KIT

Underside of 4R70W Valve Body

Instruction Booklet

b. Locate the two cast in-place bolt hole locations on the underside of the valve
body as shown in (Figure 7).

Figure 8

c. In a drill press use a 5/16" drill bit to clean up the cast in-place bolt hole locations and establish a true center for drilling further with the 13/64" or #9 drill.

Partial Drill

WARNING: Do not drill deeper than 1/16" with the 5/16" drill bit (Figure 8).
WARNING

d. After true center is established, use a 13/64" or #9 drill bit to drill all the way
through the valve body AND separator plate with a piece of wood underneath
to prevent the plate from deforming as the drill bit cuts through.
e. Remove the separator plate and enlarge the two drilled holes with a 1/4" drill
bit. De-burr the new holes in the separator plate.
Bolts
Retainer
Plate

f. With a 6.0 x 1.0mm thread tap, cut new threads in the drilled holes in the
valve body. De-burr the gasket surface, making sure there are no high spots.

Figure 9

g. Install Sonnax checkballs using the locations on page 1.
Proper position of
retainer plate
sitting on
valve body.

h. Assemble the valve body gaskets and separator plate using normal procedures.
i. Install the Sonnax gasket, valve body retainer plate and two screws and torque
to 80-100 in-lb. (9-11Nm.) (Figure 9).

The following steps are to be performed during unit overhaul:
Gasket

Spiral Ring

Drill
& Tap
Figure 10

Step 11 Install Intermediate Clutch
Spiral Retaining Ring
1. Disassembly
Remove and discard the OE retaining ring from the intermediate roller clutch or
mechanical diode assembly.

2. Installation

Locking Ring

a. Install the locking ring, cup side facing up as shown in (Figure 10).
Figure 12

Drum

Figure 11

2
4

Proper Staking
Technique

09-15-17 SC-AODE-4R75E-IN
Page 6

Proper Staking
Sequence

b. Walk the spiral ring
into the retaining groove
as pictured (Figure 11).

NOTE: The locking
ring may need to be
moved for correct
spiral ring positioning.

c. Make sure the spiral
ring is fully seated in
the groove all the way
around the assembly.
d. Stake the locking
ring in six equally
spaced places around
the outside as shown
(Figure 12).

4R70E, 4R70W, 4R75E, 4R75W, AODE SURE CURE KIT

Instruction Booklet

TIME TESTED • INDUSTRY TRUSTED

Step 12 Install Output Shaft Seals
1. Disassembly & Inspection
a. Remove and discard the OE seals on the output shaft and replace with the
Sonnax seals as shown (Figure 13).

Figure 13

Seals

CAUTION: Don't nick the sealing ring lands as this can cause ring damage.
CAUTION

b. Inspect the checkball in the direct piston (Figure 14) as it is prone to sticking.
Clean and flush with solvent or WD-40® and reseat with a small punch and
hammer.

2. Installation & Testing

Output Shaft

a. Assemble the direct clutch drum onto the output shaft (Figure 15).
c. Squirt ATF into the feed hole for direct clutch feed.
d. Apply 30–60 psi of air pressure into the feed hole.
e. Verify that there are no leaks

Figure 14
Direct
Piston

Checkball
Location

NOTE: If there are leaks, look for a worn bushing in the drum or leaks in the
ring grooves or the check ball seat.

Step 13 Install Pump Cover
& Input Shaft Seals
1. Installation

Figure 15

a. Install seals onto the pump cover (Figure 16).

NOTE: Two sets of seals are included. Select the correct size/style for the applicat
ion. The early style is a solid ring (.110" width), the late style is a butt-cut ring

(.083" width). Sizing of the early/solid style is required after installation. A mixture
of ATF and STP can be used to lubricate the solid seals while sizing with finger pressure.

b. Press input shaft out of the Forward drum. Sand ring surface lighty with
320 grit sand paper, using a crosshatch pattern (Figure 19).
c. Install solid seals onto the input shaft. Resize with your fingers. Pre-lube seals
and install into the stator for final sizing.

No Leaks
Here

2. Inspect & Verify
b. Inspect the check balls in the Forward drum shown (Figure 19), as they are
prone to sticking. Flush with solvent or WD-40® . Also be sure that the orifice
shown, is free of debris that can come from parts washers.
e. An AOD Forward drum can be used to size the early stator seals (Figure 17).
The seals can also be sized with the Forward drum, although it may take a little
longer. Carefully use the back of a pick to work the seal into the drum and let
sit for a while so the seal will stay conformed.
f. Verify correct Forward piston return spring for the application you are working
on (Figure 18).

Selective Seals:
Early = .110" thick
Late = .083" thick

Figure 16

Pump Cover
Seals
Input Shaft
Seals

Input shaft
removed from
the forward drum.

SC-AODE-4R75E-IN 09-15-17
Page 7

TIME TESTED • INDUSTRY TRUSTED

4R70E, 4R70W, 4R75E, 4R75W, AODE SURE CURE KIT

Figure 17

Instruction Booklet

Step 14 Replace Overdrive
Servo Pin (Figure 20)
a. U
se bore brush to remove sharp edges of overdrive servo pin bore in case.
b. Install O-rings on Sonnax servo pin.
c. Lubricate O-rings and roll pin on clean flat surface to size O-rings into pin
grooves.

Use an AOD Forward drum to use as sizing tool, as it has
a larger bevel on it for the seals. You will need to remove
the input shaft (early seals only).
Set the stator down onto the AOD drum. Work the edges
of the seals with pick and ease the stator down into the
drum until you need it for assembly later.
Verify correct forward piston
return spring is used.
2000–Earlier

TECH TIP: If a firmer 3-4 shift is desired, place Sonnax washer on pin against
shoulder to pre-load spring.

NOTE: Following step is easier if piston is compressed in bench vise to facilitate
retaining clip installation.

d. Install OE spring seat followed by springs, piston and retaining clip.
e. Set servo travel according to OE specifications.

Figure 18
2001–Later

Figure 20

Piston
Sleeve

Clockwise
Wind

Counter Clockwise
Wind
Figure 19
Large
Spring

Sand Here
Forward
Clutch
Drum

Servo
Piston

Small
Spring

Spring
Retainer
Washer

• 1st Checkball
• 2nd Checkball is located
inside drum under piston.
This orfice ends up full of
debris when run through
parts washer. Be sure to clean.

09-15-17 SC-AODE-4R75E-IN
Page 8

Overdrive
Servo Pin

Retainer
Plate
O-Rings

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