Page 348 of 1575

2007 > 2.7L V6 GASOLINE >
Description
The automatic transmission is a combination of 3 - element 2 - phase 1 - stage torque converter and double shaft
electrocally - controlled unit which provides 4 speeds forward and 1 reverse. To improve the efficiency of power
transmission, the line pressure control was changed applying “Variable Force Solenoid (VFS) valve” on this model.
However, adopting VFS on this model, the line pressure is variably changed according to TPS and the vehicle speed,
this will enable more improved efficiency of power transmission and fuel consumption.
Characteristics
Some of the characteristics include:
▶Different power transfer
▶Different component layout
▶New shift logic(HIVEC) to improve shift feeling
▶Position of Valve Body
▶Variable shift pattern
▶Communication protocol and method
▶Step gate type shift lever.
Item Details
Weight Reduction 1. Aluminum oil pump
a. 2.3kg Approx
2. Pressed parts a. Retainer and hub of brakes and clutches
b. Carrier of planetary gear set
Better shift quality 1. Independent control of clutches and brakes enabled better control of
hydraulic pressure and skiped shifts (4 to 2, 3 to 1)
2. During N to D or N to R shift, feedback control adopted.
3. When starting from Creep condition, reduction of shock.(Creep condition is
controlled with 1st gear)
4. Solenoid valve frequency is increased for more accurate control. 35Hz to
61.3Hz except DCCSV that is 35Hz and VFS that is 600Hz.
5. HIVEC adoption for better shift feeling.
6. Variable shift pattern.
Increase in Power train efficiency 1. Fully Variable Line Pressure
2. VFS(Variable Force Solenoid)
- Manual shifting possible
- Step gate type shift lever
Page 492 of 1575

operation.
→ NO
Go toB4.
CHECK THE TRAILING ARMS
a.Inspect the trailing arm bushings for wear or damage. Check for loose
trailing arm bolts.
b. Inspect for twisted or bent trailing arms.
● Are the trailing arms loose, damaged or worn ?
→ YES
Repair or Install new components as necessary. Test the system for
normal operation.
→ NO
Suspension system is OK. Conduct diagnosis on other suspect systems.
DETAILED TEST C : WHEEL AND TIRE CONDITIONS DETAILS/RESULTS/ACTIONS
ROAD TEST THE VEHICLE
Wheel or tire vibrations felt in the steering wheel are most likely related
to the front wheel or tire. Vibration felt through the seat are most likely
related to the rear wheel or tire. This may not always be true, but it can
help to isolate the problem to the front or rear of the vehicle.
Test drive the vehicle at different speed ranges.
During the road test, if the vibration can be eliminated by placing the
vehicle in neutral or is affected by the speed of the engine, the cause is not
the wheels or tires.
● Is there a vibration and noise ?
→ YES
Go to C2.
→ NO
The wheel and tires are OK. Conduct a diagnosis on other suspect
systems.
CHECK THE FRONT WHEEL BEARINGS Check the front wheel bearings.
Refer to Wheel Bearing Check (See DS group - front axle).
● Are the wheel bearings OK ?
→ YES
Go to C3.
→ NO
Inspect the wheel bearings. Adjust or Repair as necessary. Test the system
for normal operation.
INSPECT THE TIRES
a.Check the tires for missing weights.
b. Check the wheels for damage.
Page 961 of 1575

2007 > 2.7L V6 GASOLINE >
DESCRIPTION
The EBD system (Electronic Brake force Distribution) as a sub- system of the ABS system is to control the effective
adhesion utilization by the rear wheels.
It further utilizes the efficiency of highly developed ABS equipment by controlling the slip of the rear wheels in the
partial braking range.
The brake force is moved even closer to the optimum and controlled electronically, thus dispensing with the need for
the proportioning valve.
The proportioning valve, because of a mechanical device, has limitations to achieve an ideal brake force distribution
tothe rear wheels as well as to carry out the flexible brake force distribution proportioning to the vehicle load or weight
increasing. And in the event of malfunctioning, driver cannot notice whether it fails or not.
EBD controlled by the ABS Control Module, calculates the slip ratio of each wheel at all times and controls the brake
pressure of the rear wheels not to exceed that of the front wheels.
If the EBD fails, the EBD warning lamp (Parking brake lamp) lights up.
ADVANTAGES
a.Function improvement of the base - brake system.
b. Compensation for the different friction coefficients.
c. Elimination of the proportioning valve.
d. Failure recognition by the warning lamp.
Comparison between Proportioning valve and EBD
Page 1562 of 1575
2007 > 2.7L V6 GASOLINE >
DESCRIPTION
SELF ADJUSTING CLUTCH(S.A.C.) COVER
a. As a clutch disc facing is worn away according to its durability, a cover weight is increasing and a clutch pedal
pressure can be more needed.
b. To make up for this defect, the self adjusting clutch system makes the requsted pedal pressure minimized so that
makes the maintenance cycle longer.
CONCENTRIC SLAVE CYLINDER-C.S.C.
It improves working efficiency and lowers the number and the weight of part by unifing clutch release control
parts(clutch release bearing ~ clutch release cylinder) in a manual transaxle.
OPERATION
CONCENTRIC SLAVE CYLINDER-C.S.C
When the clutch pedal is pressed, oil pressure is transmitted along the arrow directions shown below and that moves
the clutch slave cylinder and the diaphragm spring of the clutch cover.