4L60E Trans touble shooting guide

[jeep45238]

Oil Pressure high or low (verify with gauge)

Component:
OIL PUMP ASSEMBLY
check the pressure regulator valve
the regulator valve spring
a missing or miss assembled rotor guide
a cracked rotor
reverse boost valve/sleeve stuck or damaged or wrongly assembled
orfice hole in pressure regulator valve stuck
sticking slide or excessive rotor clearance
pressure relief ball not seated or damaged
porosity in pump cover or body
wrong pump cover
pump faces not flat
excessive rotor clearance

OIL FILTER
intake pipe restricted by casting flash
cracks in filter body or intake pipe
o-ring seal missing/cut/damaged
wrong grease used during last rebuild

VALVE BODY
manual vavle scored or damaged
spacer plate/gaskets incorrect/misassembled/damaged
face not flat
2-3 shift valve stuck
checkballs missing or misassembled

PRESSURE CONTROL SOLENOID
SYSTEM VOLTAGE
PRESSURE SWITCH ASSEMBLY
CASE (case to valve body face not flat)

possible codes:
24 (VSS low)
52 (VSS high)
53 (system voltage too high)
72 (VSS loss)
73 (pressure control solenoid current)
75 (system voltage too low)
81 (2-3 shift solenoid circuit fault)
82 (1-2 shift solenoid circuit fault)

[jeep45238]

Harsh Shifts

COMPONENTS
TPS
VSS
Pressure switch assembly
Engine coolant temperature sensor
Pressure control solenoid

Possible codes:
21 (TPS circuit high)
22 (TPS circuit low)
28 (FLuid pressure switch assembly fault)
73 (Pressure control solenoid Current)

[jeep45238]

Inaccurate shift points

COMONENTS

OIL PUMP ASSEMBLY
stuck pressure regulator valve
sticking pump slide

VALVE BODY ASSEMBLY
spacer plate/gaskets misassembled, damaged, or incorrect

CASE
porus or damaged valvebody pad
2-4 servo assembly (porosity, damaged seals, apply pin damaged/improper length)
2-4 band assembly (burned, anchor pin not engaged)

TPS
damaged/disconnected

VSS
damaged/disconnected/retaining bolt not tightened

4WD low switch
disconnected/damaged

[jeep45238]

Early shifts

POSSIBLE CODES
69 (TCC stuck on)

[jeep45238]

Fixed shift points

POSSIBLE CODES
21 (TPS circuit high)
22 (TPS circuit low)

[jeep45238]

1st Gear Range Only (no upshift)

COMPONENTS
VALVE BODY
1-2 shift valve sticking
spacer plate/gaskets mispositioned or damaged

CASE
case to valve body face not flat or damaged

SHIFT SOLENOIDS
stuck or damaged
electrical connection

2-4 SERVO ASSEMBLY
restricted or blocked apply passages case
nicks or burrs on servo pin/pin bore in case
4rth servo piston in backwards

2-4 BAND ASSEMBLY
2-4 band worn or damaged
band anchor pin not engaged

[jeep45238]

Slips in 1st Gear

FORWARD CLUTCH ASSEMBLY
clutch plates worn
porosity or damaged forward clutch piston
forward clutch piston inner and outer seals missing/cut/damaged
input housing to forwad clutch housing o-ring missing/damaged
damaged forward clutch housing
forward clutch housing retainer/ball assembly not sealing or damaged

FORWARD CLUTCH ACCUMULATOR
piston seal missing/damaged
piston out of it's bore
porosity in the piston/valve body
stuck abuse valve

INPUT HOUSING AND SHAFT ASSEMBLY
turbine shaft seals missing/damaged

VALVE BODY
1-2 accumulator valve stuck
face not flat, damaged ring lands, or interconnected passages
spacer plate/gaskets incorrect/missing/damaged

LOW ROLLER CLUTCH
damaged to lugs/inner ramps
not free moving
not enough spring tension
damage to inner splines
lube passage plugged

TORQUE CONVERTER
stator roller clutch not holding

1-2 ACCUMULATOR ASSEMBPLY
porosity in piston or accumulator cover/pin assembly
damaged ring grooves on piston
piston seal missing/damaged
valve body to spacer gasket at accumulator cover missing/damaged
leak between piston and pin
broken 1-2 accumulator spring

LINE PRESSURE

2-4 SERVO ASSEMBLY
4rth servo piston in backwards

[jeep45238]

Slipping/rough 1-2 shift

CONVERTER
internal damage

OIL PUMP
stator shaft sleeve scored or off location

VALVE BODY
2-3 valve train stuck
accumulator valve stuck
spacer plate/gaskets incorrect/misspositioned/damaged

INPUT HOUSING ASSEMBLY
clutch plates worn
excessive clutch plate travel
cut/damaged piston seals
porosity in input clutch housing or piston
3-4 piston checkball stuck, damaged, or not sealing
restricted apply passages
forward clutch piston retainer and ball assembly not seating
sealing balls loose or missing

CASE
3rd accumulator retainer/ball assembly not seating

2-4 SERVO ASSEMBLY
2nd apply piston seals missing/damaged

POSSIBLE CODES
24 (VSS low)
72 (VSS loss)

[jeep45238]

2nd and 3rd gears only OR 1st and 4th gears only

POSSIBLE CODES
82 (1-2 shift solenoid circuit fault)

SHIFT SOLENOIDS
sediment/electrical connections

[jeep45238]

3rd Gear only

POSSIBLE CODES
52 (long system voltage high)
53 (System voltage high)
66 (3-2 control solenoide circuit fault
75 (System voltage low)
81 (2-3 shift solenoid circuit fault)

INSPECT
system voltage
3-2 control solenoid

[jeep45238]

3-2 Flare or Tie Up

INSPECT
3-2 control solenoid

shorted or damaged

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No 3-4 Shifts/Slipping or Rough 3-4 Shift

INSPECT

OIL PUMP ASSEMBLY
faces not flat
pump cover retainer/ball assembly missing or damaged

VALVE BODY ASEMBLY
valves stuck
2-3 shift valve
accumulator valve
1-2 shift valve train
3-2 control valve
spacer plate/gaskets incorrect/mispositioned/damaged

2-4 SERVO ASSEMBLY
incorrect band apply pin
missing/damaged servo seals
porosity in pistons/cover/case
damaged piston seal grooves
plugged or missing orfice cup plug

CASE
3rd accumulator retainer/ball assembly leaking
porosity in 3-4 accumulator piston or bore
3-4 accumulator piston seal/seal grooves damaged
plugged/missing orfice cup plug
restricted oil passage

INPUT HOUSING ASSEMBLY
*slipping 2-3 shift*

2-4 BAND ASSEMBLY
Worn or missassembled

POSSIBLE CODES
21 (TPS circuit high)
22 (TPS circuit low)
28 (Fluid pressure switch assembly fault)
37 (Brake switch stuck on)
38 (brake switch stuck off)
67 (TCC solenoid circuit fault)

[jeep45238]

No Reverse or Slips in Reverse

INSPECT COMPONENTS

INPUT HOUSING ASSEMBLY
3-4 apply ring stuck in applied position
forward clutch not releasing
turbine shaft seals missing/damaged

MANUAL VALVE LINK
disconnected

OIL PUMP ASSEMBLY
retainer/ball assembly missing or damaged
stator shaft seal rings/ring grooves damaged
stator shaft sleeve scored or damaged
reverse boost valve stuck/damaged/misassembled
cup plug missing
restricted oil passage
faces not flat
converter clutch valve stuck

VALVE BODY ASSEMBLY
2-3 shift valve stuck
manual link not adjusted
spacer plate/gasket incorrect/mispossitioned/damaged
low overrun valve stuck
orficed cup plug restricted/missing/damaged

REVERS INPUT CLUTCH ASSEMBLY
clutch plate worn
reverse input housing and drum assembly cracked at weld
clutch retaining ring out of groove
return spring assembly retaining ring out of groove
seals cut or damaged
restricted apply passage
porosity in piston
bellville piston installed wrong
excessive clutch plate travel
oversided housing

LOW AND REVERSE CLUTCH
cluthc plates worn
porosity in piston
seals damaged
return spring assembly retaining ring mispossitioned
restricted apply passage

[jeep45238]

No Part Throttle or delaed Downshifts

2-4 SERVO ASSEMBLY
servo cover retaining ring ommited or misassembled
4th apply piston damaged or misassembled
servo inner housing damaged or misassembled

VALVE BODY ASSEMBLY
3-2 downshift valve stuck
4-3 sequence valve body channel blocked

[jeep45238]

Harsh Garage Shift

VALVE BODY ASSEMBLY
orifice cup plug missing
checkball missing

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No Overrun Braking - Manual 3-2-1

INSPECT

EXTERNAL LINKAGE
inproper adjustment

VALVE BODY ASSEMBLY
4-3 sequence valve stuck
checkball mispossitioned
spacer plate/gaskets incorrect/damaged/mispositioned

INPUT CLUTCH ASSEMBLY
turbine shaft oil passages plugged/not drilled
turbine shaft seal rings damaged
turbine shaft sealing balls loose ormissing
porosity in forward or overrun clutch piston
overrun piston seals cut or damaged
overrun piston checkball not sealing

[jeep45238]

No Torque COnverter Clutch Apply

INSPECT

ELECTRICAL
12 volts not supplied to trans
outside electrical connector damaged
inside electrical connector/wiring harness/solenoid damaged
electrical short (look for pinched solenoid wires)
solenoid not grounded

TCC SOLENOID

ENGINE SPEED SENSOR

CONVERTER
inernal damage

ENGINE COOLANT TEMPERATURE SENSOR

OIL PUMP ASSEMBLY
converter clutch valve stuck/assembled backwards
converter clutch valve retaining ring mispositioned
pump to case gasket mispositioned
orfice cup plug restricted/damaged
solenoid o-ring seal damaged
high/uneven bolt torque (pump body to cover)

TRANS FLUID TEMPERATURE SENSOR

INPUT HOUSING AND SHAFT
turbine shaft oring damaged
turbine shaft retainer/ball assembly restricted/damaged

BRAKE SWITCH

PRESSURE SWITCH ASSEMBLY

VALVE BODY ASSEMBLY
tcc signal valve stuck
solenoid oring leaking

SOLENOID SCREEN
blocked

POSSIBLE CODES
21 (TPS high)
22 (TPS low)
28 (Fluid pressure switch assembly fault)
37 (Brake switch stuck on)
38 (brake switch stuck off)
52 (Long system voltage high)
53 (System voltage high)
67 (TCC solenoid circuit fault)
75 (System voltage low)
81 (2-3 shift solenoid circuit fault)

[jeep45238]

Torque COnverter Clutch Shudder

TORQUE CONVERTER ASSEMBLY
internal damage

OIL PUMP ASSEMBLY
converter clutch valve stuck
restricted oil passage

OIL FILTER
crack in filter body
flashing restricting filter neck
o-ring seal damaged

INPUT HOUSING AND SHAFT ASSEMBLY
turbine shaft oring damaged
turbine shaft retainer/ball assembly restricted/damaged

ALSO CHECK LOW OIL PRESSURE AND ENGINE TUNE

[jeep45238]

TCC apply with a Cold engine

POSSIBLE CODES
14 (engine coolant temp high)
15 (engine coolant temp sensor low)

[jeep45238]

No Torque Converter Clutch Release

TCC SOLENOID
external ground
clogged exhaust orifice

CONVERTER
internal damage

VALVE BODY ASSEMBLY
converter clutch apply valve stuckin apply position

OIL PUMP ASSEMBLY
converter clutch valve stuck

PCM
external ground