reverse KIA CARNIVAL 2007 User Guide

2007 > 2.7L V6 GASOLINE >
SPECIFICATION
Item F4A51
Torque converter type 3 - element, 1 - stage, 2 - phase type
Transaxle type 4 - speed forward, 1 - speed reverse
Engine displacement 2.7L GSL
Gear ratio 1st
2.842
2nd 1.495
3rd 1.000
4th 0.731
Reverse 2.720
Final gear ratio 4.520
Shift pattern Variable
Shift range 4range ( P- R- N- D) + Sports mode
Shift range valve PWM ; 5EA(Duty control) , VFS
Planetary gear 2EA(Output planetary/Overdrive planetary)
Clutch 3EA
Brake 2EA
OWC 1EA
TIGHTENING TORQUE ITEM Nmkgf·m lb- ft
Control cable nut 8 ~ 120.8 ~ 1.2 5.8 ~ 8.6
Input shaft speed sensor 10 ~ 121.0 ~1.2 7 ~ 8
Output shaft speed sensor 10 ~ 121.0 ~1.2 7 ~ 8
Manual control lever 18 ~ 251.8 ~ 2.5 13 ~ 18
Transaxle range switch 10 ~ 121.0 ~1.2 7 ~ 8
Valve body cover 10 ~ 121.0 ~1.2 7 ~ 8
Valve body mounting bolt 10 ~ 121.0 ~1.2 7 ~ 8
Oil temperature sensor 10 ~ 121.0 ~1.2 7 ~ 8
Oil filler plug 29 ~ 342.9 ~ 3.421.4 ~ 25.1
Oil drain plug 40 ~ 504.0 ~ 5.0 29 ~ 36
Solenoid valve support 5 ~ 70.5 ~ 0.7 4 ~ 5
Pressure check plug 8 ~ 100.8 ~ 1.0 6 ~ 7
Transaxle mounting sub bracket nut 60 ~ 806.0 ~ 8.0 43 ~ 58
Transaxle mounting bracket bolts 40 ~ 554.0 ~ 5.5 29 ~ 40
Transaxle mounting insulator bolt 90 ~ 1109.0 ~ 1165 ~ 80
Transaxle and engine mounting bolt 65 ~ 856.5 ~ 8.5 47 ~ 61.5
Drive plate bolt 46 ~ 534.6 ~ 5.333.3 ~ 38.3

2007 > 2.7L V6 GASOLINE >
Hydraulic Control System
DESCRIPTION
a.Better and smoother shift quality.
b. In order to prevent ATF leakage from the valve body or each elements, the exhaust ports have been grouped into
only one with an addition of a check ball.
c. If a failure occurs in its electric control, the switch valve and fail safe valve is able to move to enable 3rd speed
drive or reverse.
d. The hydraulic system consists of oil pump, regulator valve, solenoid valves, pressure control valve and valve body.
e. In order to control the optimal line pressure and inprove the efficiency of power transmission according to maximize
the efficiency of the oil pump, VFS(Variable Force Solenoid) valve has been added in the valve body hydralic
circuit.

fluctuated even though turns on or off the input signal. The electrical ‘time constant’ is much more fast than one of
mechanical so the frequency of VFS is extremely higher than the conventional PWM type.
Characteristics of Bosch VFS:
Supply pressure : 700~1600kPa
Control pressure: typically 600~0 kPa
Current range: typically 0~1,000 mA
Dither frequency: Up to 600 Hz
Dimension: 32 mm protrusion reach 42 mm
The reducing pressure will be supplied to the ‘Supply’ port of the VFS valve on the above illustration to control the line
pressure.
Reducing pressure
Function
As same as one of Alpha or Beta automatic transaxle system, this reducing valve length can be adjusted by rotating
the screw on the picture. As you rotate the screw toward clockwise by 90°, the reducing pressure will increase about
1.0bar. However, the reducing pressure is used just as a ‘supply pressure’ for the solenoid valves (except
Low&Reverse, Reduction and Damper Clutch control solen), so this may not be handled to rotate in the field service
shop. VFS is operated based on the ‘supply pressure’ and it outputs the ‘control pressure’ to control the regulator
valve indirectly. While developing the VFS system, the line pressure was used as a ‘supply pressure’ for VFS and
other solenoid valves but it has been changed into additional ‘reducing pressure’ because the line pressure is variably
changed by VFS so the control pressure becomes unstable and some hydraulic pressure oscillation occurred. That is

changed by VFS so the control pressure becomes unstable and some hydraulic pressure oscillation occurred. That is
why the reducing pressure has been added in the hydraulic circuit of VFS system for both 4th and 5th speed A/T.
The reducing pressure is about 6.5bar and this value does not be changed regardless of the driving or engine load
condition. Be sure that the conventional line pressure is used for the ‘supply pressure’ of Low&Reverse, Reduction
solenoid because the variable line pressure is not available at reverse range.
HYDRULIC PRESSURE TABLE
Under the constant current amount of VFS (200mA), the line pressure will become as below table. Be sure that the
following data can be achieved by specific special facility or device to check the performance of A/T assembly (not on
the vehicle), however we can refer the maximum pressure value according to each element.Solenoid valve Duty( Ë)
Measured Element Pressure kPa(Psi)
LR 2ND UDODRED*
0 100 0100 0
LR 1030±20(149±3)
60 ↑↑↑↑ 520±40(75±6)
75 ↑↑↑↑ 230±40(33±6)
100 ↑↑↑↑ 0
100 00100 0
2ND 1030±20(149±3)
↑ 60 ↑↑↑ 550±40(80±6)
↑ 75 ↑↑↑ 220±40(32±6)

Reverse

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

MECHANICAL SYSTEM
OPERATION COMPONENTS AND FUNCTIONOperating Element Symbol Function
Under drive clutch UDConnect input shaft and under drive sun gear
Reverse clutch REVConnect input shaft and reverse sun gear
Overdrive clutch ODConnect input shaft and over drive carrier

Low&Reverse brakeLRHold LR annulus gear and OD carrier
Second brake 2NDHold reverse sun gear
One way clutch OWCRestrict the rotating direction of low & reverse annulus gear
Operating elements
UD/COD/CREV/C 2ND/B LR/BOWC
P ●
R ●●
N ●
D1 ● ●○
D2 ● ●
D3 ●●
D4 ●●
1) ○ : OWC is operated when shifts from 1st gear to 2nd gear.
2) L&R brake is released in 1st gear when the vehicle speed is more than 5KPH approximately.
Torque converter and shaft
The torque converter consists of an impeller(pump), turbine and stator assembly in a single unit. The pump is
connected to the engine crankshaft and turns as the engine turns. This drawing force is transmitted to the turbine
through the oil which is recycled by the stator.
The transmission has two parallel shafts ; the input shaft and the output shaft. Both shafts are in line with the engine
crankshaft. The input shaft includes the overdrive clutch, reverse clutch, underdrive clutch, one way clutch, 2ND brake,
low&reverse brake, overdrive planetary carrier, output planetary carrier and transfer drive gear. The output shaft
includes the transfer driven gear.
CLUTCHES
The gear changing mechanism utilizes three multi- disc clutches. The retainers of these clutches are fabricated from
high- precision sheet metal for lightness and ease of production. Also, more responsive gearshifts at high engine
speeds are achieved by a pressure- balanced piston mechanism that cancels out centrifugal hydraulic pressure. This
mechanism replaces the conventional ball check valve.
UNDERDRIVE CLUTCH
The underdrive clutch operates in 1st, 2nd, and 3rd gears and transmits driving force from the input shaft to the
underdrive sun gear(A).
The components comprising the under clutch are as illustrated below.

Hydraulic pressure acts in the piston pressure chamber(B) (between the piston(c) and retainer) and thus pushes the
piston(C). In turn, the piston depresses the clutch discs and thereby transmits driving force from the retainer(D) to the
hub(E) side.
At high speed, fluid remaining in the piston pressure chamber is subjected to centrifugal force and attempts to push
the piston.
However, fluid in the balance fluid chamber(A) (the space between the piston and return spring retainer(B)) is also
subjected to centrifugal force.
Thus, the hydraulic pressure on one side of the piston cancels out the hydraulic pressure on the other side, and the
piston does not move.
REVERSE CLUTCH AND OVERDRIVE CLUTCH
The reverse clutch(C) operates when the reverse gear is selected and transmits driving force from the input shaft to
the reverse sun gear.
The overdrive clutch(D) operates in 3rd and 4th gears and transmits driving force from the input shaft to the overdrive
planetary carrier and low- reverse annulus gear.

BRAKES
The gear changing mechanism utilizes two multi- disc brakes.
LOW&REVERSE BRAKE AND SECOND BRAKE
The low&reverse brake(A) operates in 1st and reverse gears, when the vehicle is parked, and during manual
operation. It locks the low&reverse annulus gear and overdrive planetary carrier to the case.
The second(C) brake(B) operates in 2nd and 4th gears and locks the reverse sun gear(D) to the case.
The components comprising the low&reverse brake and second brake are as illustrated below.
As shown, the discs and plates of the two brakes are arranged on either side of the rear cushion plate(E), which is
itself secured to the case(F) by a snap ring.
OWC
To improve the shift feeling from 1st to 2nd gear, OWC was adopted on the low&reverse brake annulus gear. Instead
of hydraulic fixing by Low&reverse brake at the 1st gear, this mechanical fixing device was used. This structure is not
a new concept, because this OWC already has been installed on the previous models.
ACCUMULATORS
NumberFunction Name Color
1 Low&Reverse Brake None
2 Underdrive Clutch Yellow
3 Second Brake Blue
4 Overdrive Clutch None