SC 4L60E IN

2016-04-15

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T r a n sm i ss ion Part s

Sure Cure® Kit

Instructions

TOO L

GM 4L60-E PWM

Part No.

UIRE

SC-4L60E

Valve Body Parts
TCC Regulator Valve Kit

TOOL

77754-04K
Patent Nos. 6,990,996 & 7,104,273
Note: This part requires tool kit 77754-R2.
EQ

UIRE

TOOL

AFL Valve Assembly

UIRE

77754-09K
Patent No. 6,634,377
Note: This part requires tool kit 77754-TL.

Pinless Acc. Piston Kit
77998-03K
Patent No. 6,899,211

1-2 & 4th

Servo Release
Check Valve Kit

77701-076

1-2, 3-4 Accumulator Spring
74926

Checkballs

10000-08 (8)

Valve Body Retainer Clip
Forward & Reverse
Abuse Bore Plugs

Note: This kit is fully compatible with ‘95-later 4L60-E units with PWM/EC3 (electronically controlled
capacity clutch) control. These can be identified by the 13-pin case connector, PWM/TCC solenoid
and PWM pump (five solenoids). All components in this kit are compatible ‘93–‘94 non-PWM units
EXCEPT the TCC apply valve 77805E-K installed in the pump. These units can be identified by the
12-pin case connector, only having a 3-2 solenoid in valve body (four solenoids).

77754-21 (2)

The following tool kits are required to install this Sure Cure Kit:

77754-08

3-4 Relay Valve End Plug

Note: Instructions are provided with these tool kits.

77764-07

Part No.

Reamer

• Reamer
• Core Drill 4L80-E Only
• Reamer Jig 4L60-E Only
• Reamer Jig 4L80-E Only
• Drill Guide 4L80-E Only
• Drill Bit .051" (not shown)

77754-R2

Pump Parts
Oversized Boost Valve &
Spacer (.490") Patent No. 6,619,323
TCC Apply Valve Kit
77805E-K

Oversized PR Valve

TOOL

Pump Slide Pivot Pin
Pump Bushing

77917-07
Note: This part requires tool kit 77917-TL.
R

UIRE

65797

77005T

Reassembly Parts
D-Ring Servo Seals

(5)

Endplay Shims
77406-10
77409-15

Note: For installing TCC regulator valve
kit 77754-04K in units with a .441" dia.
isolator valve where the isolator bore is
not worn.
If the valve measures .473" dia., you have
a GM serviced valve body and have two
reaming options (in either case you also
will need to install Sonnax isolator sleeve
kit 77754-ISO):
• Ream the bore using tool kit
77754-SERV followed by tool kit
77754-RM5.
• Ream the bore with the VB-FIX
reaming fixture and tool kits.
F-77754-SERV followed by
F-77754-TL4.

.010"
.015"

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

77754-TL

Note: For installing AFL valve kit 77754-09K.
This tool kit also works for 4L80-E AFL valve
repairs.

Part No.

77917-TL

• Reamer
• Jig
Note: For installing oversized PR valve 77917-07.
SC-4L60E-IN pg1 12-07-12
Page 1

CHECK BALL & VALVE BODY PART LOCATIONS

Accumulator Valve Train
(not in this kit)

Note: 7 valve body checkball locations

as indicated above.
8th checkball location is in case as
shown in step #13.

Actuator Feed Limit Valve Kit
(Reamer #77754-TL required)

TCC Regulator Valve Kits
(Reamer #77754-R2 required)

Sure Cure Fast Version
If you need to get this job out the door in a hurry, then just follow highlighted steps below. The other steps are repair
information (to help prevent NO GOs and CBs) & OEM part numbers that you can read at your convenience.STEPS
1. Bearing and planetary inspection

12. Separator plate modification

2. Case and bore prep

13. Checkball

3. Servo seals

14. Forward Abuse Bore Plug22. Forward accumulator

4. Pressure Regulator Valve

17. AFL valve (tool required)

5. Boost Valve

18. Separator plate modification

6. Pump body

19. TCC regulator valve (tool required)

7. Pump cover
8. TCC apply valve inspection

20. Reverse Servo Abuse Bore Plug

9. TCC apply valve installation

21. 3-4 Relay Valve End Plug

10. Pinless accumulator pistons

22. 3-2 Downshift Abuse Plug

11. Servo check valve

04-09-10
Page 2

SC-4L60E-IN

TIME TESTED • INDUSTRY TRUSTED

STEP 1

BEARING & PLANETARY INSPECTION (REASSEMBLY PARTS)

.025" Max.
Inspect bearings for galling
on race and needles

Note: Bearings can easily be pried open at the crimp.
Ask for Torrington™ Bearing Kit SBK-G12.

STEP 2

Inspect planet pins and endplay.
No side to side movement

PREPARE CASE, SERVO AND ACCUMULATOR BORES
Follow the ScotchBrite™
with a wire-wrapped strip
of the parts cardboard or
leather. This will polish
off sharp edges, and
reduce initial seal scuff.

Use a fine grit stone to remove high spots on case and valve body.
Scuff the accumulator(s) and servo bore with Red ScotchBrite™.
A stiff wire or rod wrapped with material can be spun in a drill.

STEP 3

Note: Viton® seals require a surface that retains fluid to ensure
long life.

PREP SURFACES BEFORE CLEANING AND FINISH WITH SOLVENT.

SERVO SEALS

Install Viton® Servo D-ring seals.
Discard OEM seal.
Prepare the seal surfaces
on cover and inner housing
as mentioned in previous step.

800/843-2600 • 802/463-9722 • fax: 802/463-4059 • www.sonnax.com

SC-4L60E-IN

04-09-10
Page 3

STEP 4

REAM & INSTALL PRESSURE REGULATOR VALVE

Reaming Instructions
1. Remove and discard the OEM pressure regulator valve.
Reamer

2. Clamp the pump housing securely to
a bench.
3. Install the reamer and guide 77917-TL
as shown in the figure above.
4. Flood the valve bore and reamer flutes with cutting fluid (Tap
Magic™, kerosene, etc.).

Pump Body

5. Using a “low” RPM (500-600) drill, carefully ream the valve bore. Maintain
a constant moderate clockwise rotation and apply steady forward pressure
until the reamer reaches the bottom of the valve bore. The reamer should
cut easily. Continue to turn the reamer clockwise as it is removed from
the bore. Ream one pass only.
6. Remove any debris and burrs from the bore. Lubricate and install the
Sonnax replacement valve.

Pressure Regulator Valve
4L60-E

STEP 5

BOOST VALVE

Late pump
cast feature

Pre-2005 pumps use enclosed
boost assembly WITH the
enclosed sleeve spacer. This is
to set correct sleeve and
spring height and to ensure
correct line pressure.

STEP 6

2005 and later pumps use
enclosed boost assembly
WITHOUT the enclosed
sleeve spacer. This is to set
correct sleeve and spring
height and to ensure correct
line pressure.

PUMP BODY PARTS INSTALLATION
PTFE-coated pump bushing is inserted here as rebuild
option. Butt gap bushing is not suggested unless the pump
has anti-walk ridge. Surfaces must be prepared with #609
Loctite®. Butt gap should be placed at 12 o’clock position
and installed using full end contact on arbor press.

Install new
pivot pin

Also available:
Heavy Duty Slide Spring
77722-01K

OEM

04-09-10
Page 4

SC-4L60E-IN

TIME TESTED • INDUSTRY TRUSTED

STEP 7

PUMP COVER IDENTIFICATION

Non PWM
If the casting has two parallel webs, it is NON PWM and
takes valve 77805-K (Not
included in Sure Cure)

Remove the relief rivet and clean ball and seat. With severe
contamination, reform the seat by tapping ball into it.
Note: Don’t forget to replace filter o-ring.

STEP 8

PWM
If the casting has a bridge at
this location, use valve
77805E-K in this kit
(See also Step 13).

P/N 77805-K is not in this kit!

TCC APPLY VALVE IDENTIFICATION

Photo at right shows the 3 different
OEM 4L60 and 4L60-E TCC apply
valves. Oil circuits differ, so it is critical
NOT TO MISMATCH PWM versus nonPWM valves. OEM valve materials can
be steel or aluminum, and should not
be used for identification. A double
spool at the indicated location can be
used to determine PWM versus nonPWM valves.

Pump Cover

Sonnax kit 77805E-K, included, can be
used in both early and late PWM
applications. Discard OEM valve and
spring(s), and replace with complete
valve and seal kit.

Double spool
here indicates
non-PWM valve

TCC VALVE INSTALLATION

STEP 9

PTFE seal resize

PTFE seal supplied must be stretched to install into valve
groove. Resize with finger pressure, pre-lube, then resize by
inverting into bore.
Insert 1/8" or up to seal only. Let it stand for a few minutes.

Inspect the TCC solenoid seat for cracks.

800/843-2600 • 802/463-9722 • fax: 802/463-4059 • www.sonnax.com

SC-4L60E-IN

04-09-10
Page 5

STEP 10

PINLESS SONNAX ACCUMULATOR PISTONS

OEM pin must be driven from cover.

Viton® rubber D-ring
installs into groove at
closed dome end and
Teflon® plastic installs
into groove at
open-pocket end.

Plug pin holes by driving either the large or
small steel checkballs into the hole. Lightly
stake the pin bore after installing the ball.

Reassembly:
• Pre-1994 - 4th piston - Install dome into case with spring
in pocket.
• 1-2 piston - Install dome into accumulator
body followed by purple spring.

Teflon®

•1
994 later - 4th piston - Install dome into case.
Some units do not have a spring for 4th accumulator.
If OEM had a spring, install into piston pocket.
• 1-2 piston – Install spring(s) into accumulator body,
set piston pocket opening onto spring, dome toward plate.
(Patent Pending)

STEP 11

Viton®

SERVO RELEASE CHECK VALVE

NOTE: Before installing servo release check valve, make
sure the 3rd accumulator checkball capsule is in the case
and there are no leaks. Replace a leaking capsule with OE
p/n 8634400.

Some cases bores may be oversized. Use o-ring on check
valve for these bores only. If valve goes into bore without resistance, install the o-ring.

• If necessary adjust orifice “A” in valve to match servo
being used (see info to right).
• Tapered end goes in first. Valve must be driven flush with
case surface and must be tight.

Adjust “A”
Orifice to Suit
Servo:

• Install into case without included O-ring. If fit is loose,
install included O-ring on check valve and reinstall.
• Adjust separator plate orifice “C” to match vehicle (see
step 19).

• If the last three servo casting numbers are 553, 554 or 159,
or any servo with 2.312" to 2.520" small diameter piston,
Sonnax valve installs “as is”.
• If the last three digits are 093, or the servo is a one-piece aftermarket; enlarge the orifice “A” (at center groove) to .120"–.125".

STEP 12

SEPARATOR PLATE 3-4 CLUTCH FEED IMPROVEMENT

Set up the plate to match your vehicle needs:
A larger separator plate feed hole-C- will result
in a shorter 2-3 shift. Too large, and a bumpy
2-3 will result. Locate the 3-4 clutch feed -Corifice in your plate.

The Sonnax check valve will be installed
with the OE 3rd accumulator check valve
(OE part #8634400).

“C” Hole
#24F

“C” - Transmission 4L60-E
Application

Orifice Dia.

Regular Duty

No Plate
Modification

Moderate
Performance

.090"

Maximum
Performance

.100"

Check valve can be removed by threading it
(5/16” x 18”) and using a bolt-on slide hammer
or #5 easy out.
03-01-16
Page 6

SC-4L60E-IN

4L60-E Spacer Plate

The check valve Installs on top of the OE
3rd accumulator capsule.

STEP 13

CHECKBALLS AND ASSEMBLY TIPS

Non-PWM

If you are installing this kit in the vehicle, checkballs must be loaded into valve body.
Valve body checkball locations shown here and picture of
checkball and valve body part locations shown before Step 1.
Do not use
excessive
lube, as
balls will
not seat
until lube
melts.

Supply 12 volts to TCC
solenoid and WAT here.
TCC valve in pump will
stroke.

Drill bit used to check
low-reverse clutch clearance
(clutch clearance on spec sheet).

Servo check valve
from step 11

Case checkball

4th accumulator
pre-assembled

Note checkball locations

Orifice “C” for check valve modification in step 20

Plate with holes is PWM
Plate without holes is not PWM
Case connector retainer #77980-01K
Note alignment holes in plate

STEPS 14-22

STEPS 14 TO 22 INDICATED BY NUMBER ON VALVE BODY

STEP 14:

ALF

With forward accumulator cover still
off, remove low-overrun valve and
roll pin.

Pull out the divider plug and replace
with abuse bore plug in kit.

STEP 15:
Reassemble forward accumulator.

STEP 16:
Update shift solenoids, replace o-rings.

Inspect Bore here

Solenoid information in
specifications.

16
22
Same procedure as #14

Pull roll pin. Replace with abuse
bore plug in kit.

22
22
©2010 Sonnax Industries, Inc.
TIME TESTED • INDUSTRY TRUSTED

800/843-2600 • 802/463-9722 • fax: 802/463-4059 • www.sonnax.com

SC-4L60E-IN

04-09-10
Page 7

STEP 17

AFL BORE INSPECTION AND REPAIR

AFL should not have movement

Prop the AFL valve
open by 3/32" from
underneath.

Remove EPC solenoid, clean the screen and replace filters in plate.

EPC solenoid bore wear. Run
tubing cutter around EPC
manifold to raise material.

AFL visible bore wear

Note: Reamer kit 77754-TL required. Also works on 4L80-E.
4L60-E uses marked reamer and guide. No pre-drilling required.
Reaming:
Fill circuits with
ATF or cutting
fluid. Turn reamer
clockwise only!
Use speed handle
and do not push
on reamer.

Example:
Clip installed here after
sleeve installed
Valve
(77754-09K: U.S. Pat.
No. 6,634,377)

AFL assembly
Clamp valve body
“lightly” to bench.

After sleeve installation
“poodle clip” pushes into sleeve
groove at channel indicated.

STEP 18

Page 8

SC-4L60E-IN

Spring

Converter regulator
valve Reamer
#77754-R2

AFL BALANCE HOLE MODIFICATION

When AFL valve & sleeve are installed, the AFL balance hole in
plate must be opened with drill supplied in reamer kit.

04-09-10

End Plug

Enlarge the indicated balance AFL orifice to
.052" with the drill bit supplied in reamer kit.

TIME TESTED • INDUSTRY TRUSTED

STEP 19

CONVERTER REGULATOR VALVE DESIGN VARIATIONS:

“SERV” stamped
here indicates a
“reamed” valve
body

Valves from “SERV”
valve body
2001-Up valve body
1997 EC3 to 2000

Sonnax valves
repair these
OEM designs

1996-1997
non-EC3 line-up
Remanufactured SERV stamped
into casting, valve same O.D. as
12mm wrench (.473”).
DO NOT ATTEMPT TO RE-REAM A
SERV VALVE BODY WITH 77754-R2

1993-Up
.441" diameter

Casting Number
ID-1993 up to 2000

Wide 1st design TCC
regulator exhaust

1994-1995
PWM line-up
1993-1994
non-PWM line-up

Casting Number
ID 2001

Updated, full annular exhaust

Remove OEM converter regulator valve
Ream this bore with 77754-R2 (sold separately)
Lightly clamp to bench, this side up.
Fill circuits with ATF/ cutting fluid.
Turn reamer with speed handle.
Ream, turning clockwise only.
Blow chips free before removal.
Never turn counterclockwise!
If tight assembly, repeat with 500 RPM drill.

Update TCC/PWM
Solenoid to GM P/N 24212690

800/843-2600 • 802/463-9722 • fax: 802/463-4059 • www.sonnax.com

SC-4L60E-IN

04-09-10
Page 9

STEP 20

NEW PLATE & VALVE APPLICATION
3

Do not use the round hole plate on a '01 valve body.
The plate with rectangular slot can be used with '93-'00 valve body.

Sonnax installed - Non-PWM

Sonnax installed - PWM

Line
2nd
Clutch

Regulator
Valve

TCC
Signal

TCC
Balance

Line
PWM
Boost

Regulator
Apply Valve

Exhaust
Isolator Valve

STEPS 21-22

Exhaust
Regulator Apply
Valve Sleeve

Page 10

SC-4L60E-IN

Isolator Valve

Annular
Grooves

Regulator Apply
Valve Sleeve

BORE INSPECTION (LEFT: 3-4 RELAY, RIGHT: 3-2 DOWNSHIFT)

21. Inspect bore for wear at the 3-4 valve using wiggle test as
shown. Replace end plug with o-ringed end plug provided.

04-09-10

Apply
Balance

Conv.
Apply

22. Remove 3-2 downshift assembly to remove the inner plug
and replace with abuse plug provided.

TIME TESTED • INDUSTRY TRUSTED

Specifications and Rebuild Information:
R & R INFORMATION:
Cooler return line: Top line
Correct Sonnaflow® readings: 1.5-1.7 GPM TCC off, 2.0-2.6 TCC applied
Fluid capacity: Pan removal 5 qts. overhaul 11 qts
Cold climate (-20f. or more) fluid suggestion: 100% synthetic ATF or blend 50%
Suggested system fluid change on all PWM controlled converters: 40,000 miles
Line pressure: P-N-OD idle 55
R idle 64

Max. EPC 190
Max EPC 320 (Average 270-300)

An effective line pressure and pump output test is:
Reverse 600-750 RPM, with maximum EPC
Line pressure should obtain 270 psi, and not drop more than 20 psi or create an unstable gauge.

CONVERTER IDENTIFICATION:
Bolt-on bell housing height on large 300mm converter: 7"
298mm converter height: (hub set on bench to pad surface) 5.875"
300mm converter height: (hub set on bench to pad surface) 6.500"
Year

Converter control

OEM friction material

Converter Code

‘93-’94

on-off

paper

‘95-’96

PWM

composition carbon

G.H,L

‘97 W cars 3.4

EC3

woven carbon

N,P,F

‘97 298mm truck

PWM

composition carbon

G,H,L

‘98 all

EC3

woven carbon

N,P,F

‘98-2000

EC3

woven carbon

B,A

CRITICAL TORQUE AND ASSEMBLY SPECIFICATIONS:
Valve body and accumulator to case

06-10 ft. lbs

Pump body

15-20 ft. lbs

Pump to case

15-20 ft. lbs.

Bell housing to case

48-55 ft. lbs. (Sonnax Torx bit #77000-HBK)

OEM CLUTCH/BAND CLEARANCE, ENDPLAY SPECIFICATIONS:
Forward clutch

.030" - .063"

3-4 clutch

.035" - .083"

Reverse input

.040" - .076"

Low-reverse clutch component stack on bench

1.15"- 1.18"

"Rule of thumb for unspecified clutch" allow .010" clearance per friction
(Note: Picture 19 Drill bit inserted between clutches with separator plate off, is used to verify low-reverse clearance.)
Servo travel:

.075-.125" (band must freewheel over drum when turning output shaft)

Pump slide clearance

.0008"-.0020"

Pump vane clearance

.002" max.

3rd accumulator check ball tube to case depth

1.653"

Planet side gear clearance

.024" max.

Endplay

.005" to .036" total unit (combined)

ELECTRICAL:
OHM Readings

GM P/N’s

Shift solenoid

20-40 ohms

10478131

TCC PWM solenoid

10-15 ohms

24212690

3-2 downshift solenoid

20-31 ohms

24212327 (‘96 on, 93-95 PWM 9-13)

EPC solenoid resistance

3.5-8 ohms

24209276

TCC solenoid resistance

20-40 ohms

N/A

Shift solenoid firing order: 1st gear both on , 2nd 2-3 on, 3rd both off, 4th 1-2 on
Transmission temperature sensor under approximately 100 ohms inhibits 4th, and brings TCC on after 1-2 shift.

800/843-2600 • 802/463-9722 • fax: 802/463-4059 • www.sonnax.com

SC-4L60E-IN

04-09-10
Page 11

WET AIR TESTS

On non-PWM
pump, air psi
strokes TCC
apply valve.

WAT: Verifies
filter and o-ring
Use ATF here to identify leakage

Test at
Orifice Plug

Plug off forward,
WAT overruns,
No 3-4 piston
movement!

Reverse:
No checkball leaks
No leaks at torque signal

No leakage into
U shaped circuit.

Forward clutch,
No 3-4 apply!

3-4 clutch: Overrun,
no piston movement

Torque signal:
No leakage from reverse
Pressurize roll pin
from machined side.

Place fluid into the
U-shaped cavity over
lo-overrun valve.

When WAT 3-4 clutch:
No oil loss at checkball,
or base of shaft.

Close off roll pin under the valve
body w/finger.
Stator Inspection:
If you had an overheated converter or
stator, inspect tube sleeves for cross
leaks. These leaks can be identified by
the WATs and testing the tube by itself.

Note: A 100% leak tested shaft, 77918S-K or
77918S-1K, are available from Sonnax.
3-4 Clutch
Forward

2005 & later stator shafts are not interchangeable
with 2004 & earlier shafts.
07/21/04

Overrun Clutch

04-09-10
Page 12

SC-4L60E-IN

TIME TESTED • INDUSTRY TRUSTED

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