Chrysler Pacifica. Manual — part 774
Remover/Installer 6302
Installer 6536-A
Puller 7794-A
End Play Socket Set 8266
Input Clutch Pressure Fixture 8391
Driveline Support Table 8874
Driveline Support Fixture 8534B
CS
41AE/TE AUTOMATIC TRANSAXLE
21 - 91
41AE/TE AUTOMATIC TRANSAXLE (Continued)
ACCUMULATOR
DESCRIPTION
The 4XTE underdrive, overdrive, low/reverse, and
2/4 clutch hydraulic circuits each contain an accumu-
lator. An accumulator typically consists of a piston,
return spring(s), and a cover or plug. The overdrive
and underdrive accumulators are located within the
transaxle case, and are retained by the valve body
(Fig. 208).
The low reverse accumulator (Fig. 209) is also
located within the transaxle case, but the assembly is
retained by a cover and a snap-ring.
The 2/4 accumulator is located in the valve body. It
is retained by a cover and retaining screws (Fig.
210).
OPERATION
The function of an accumulator is to cushion the
application of a frictional clutch element. When pres-
surized fluid is applied to a clutch circuit, the appli-
cation force is dampened by fluid collecting in the
respective accumulator chamber against the piston
and spring(s). The intended result is a smooth, firm
clutch application.
AUTOSTICK SWITCH
DESCRIPTION
Autostick is a driver-interactive transmission fea-
ture that offers manual gear shifting capability to
provide you with more control. Autostick allows you
to maximize engine braking, eliminate undersirable
upshifts and downshifts, and improve overall vehicle
performance. This sysytem can also provide you with
more control during passing, city driving, cold slip-
pery conditions, mountain driving, trailer towing,
and many other situations.
OPERATION
Autostick is a driver–interactive transaxle feature
that offers manual gear shifting capability. When the
shifter is moved into the Autostick position, the
transaxle remains in whatever gear it was using
before Autostick was activated. Moving the shifter to
the left (towards the driver) causes a downshift and
moving to the right (towards the passenger) causes
Fig. 208 Underdrive and Overdrive Accumulators
1 - OVERDRIVE PISTON AND SPRING
2 - UNDERDRIVE PISTON AND SPRING
Fig. 209 Low/Reverse Accumulator
1 - PISTON
2 - RETURN SPRINGS
Fig. 210 2/4 Accumulator Assembly
1 - VALVE BODY
2 - RETAINER PLATE
3 - DETENT SPRING
4 - RETURN SPRINGS
5 - PISTON
21 - 92
41AE/TE AUTOMATIC TRANSAXLE
CS
an upshift. The instrument cluster will illuminate
the selected gear. The vehicle can be launched in 1st,
2nd, or 3rd gear while in the Autostick mode. The
speed control is operable in 3rd and 4th gear Auto-
stick mode. Speed control will be deactivated if the
transaxle is shifted to 2nd gear. Shifting into OD
position cancels the Autostick mode, and the trans-
axle resumes the OD shift schedule.
DEACTIVATION
The autostick feature will be deactivated if one of
the following conditions occur:
• DTC
P0706–Check
Shifter
Signal–usually
accompanied by all PRNDL lights turning on in Park
and Neutral. This will result in a DTC P0706 if three
such errors are detected after any one “key–on”.
• DTC P0952–Autostick Input Circuit (Low)
• DTC P1797–Manual Shift Overheat–(Transmis-
sion oil temperature >275° F) or (Engine coolant tem-
perature >255° F).
Acceptable
powertrain
temperature
must
be
achieved to reactivate Autostick after a high temper-
ature fault:
• Transmission Oil Temperature <255° F
• Engine Coolant Temperature <240° F
AUTOMATIC OVERRIDES
For safety, durability, and driveability, some shifts
are executed automatically or prevented.
AUTOMATIC SHIFTS WILL OCCUR UNDER THE FOLLOWING CONDITIONS
TYPE OF SHIFT
APPROXIMATE SHIFT POINT
3.5L
4-3 coast downshift
14 mph
3-2 coast downshift
10 mph
2-1 coast downshift
5 mph
1-2 upshift
6600 engine rpm
2-3 upshift
6600 engine rpm
4-3 kickdown shift
14-52 mph w/sufficient throttle
MANUAL SHIFTS ARE NOT PERMITTED UNDER THE FOLLOWING CONDITIONS
TYPE OF SHIFT
APPROXIMATE SHIFT POINT
3-4 upshift
Below 15 mph
3-2 downshift
Above 81 mph @ closed throttle or 76 mph otherwise
2-1 downshift
Above 45 mph @ closed throttle or 42 mph otherwise
DRIVING CLUTCHES
DESCRIPTION
Three hydraulically applied input clutches are used
to drive planetary components. The underdrive, over-
drive, and reverse clutches are considered input
clutches and are contained within the input clutch
assembly (Fig. 211). The input clutch assembly also
contains:
• Input shaft
• Input hub
• Clutch retainer
• Underdrive piston
• Overdrive/reverse piston
• Overdrive hub
• Underdrive hub
OPERATION
The three input clutches are responsible for driving
different components of the planetary geartrain.
NOTE: Refer to the “Elements In Use” chart in Diag-
nosis and Testing for a collective view of which
clutch elements are applied at each position of the
selector lever.
UNDERDRIVE CLUTCH
The underdrive clutch is hydraulically applied in
first, second, and third (direct) gears by pressurized
fluid against the underdrive piston. When the under-
drive clutch is applied, the underdrive hub drives the
rear sun gear.
CS
41AE/TE AUTOMATIC TRANSAXLE
21 - 93
AUTOSTICK SWITCH (Continued)
OVERDRIVE CLUTCH
The overdrive clutch is hydraulically applied in
third (direct) and overdrive gears by pressurized fluid
against the overdrive/reverse piston. When the over-
drive clutch is applied, the overdrive hub drives the
front planet carrier.
REVERSE CLUTCH
The reverse clutch is hydraulically applied in
reverse gear only by pressurized fluid against the
overdrive/reverse piston. When the reverse clutch is
applied, the front sun gear assembly is driven.
FINAL DRIVE
DESCRIPTION
The 41TE differential is a conventional open
design. It consists of a ring gear and a differential
case. The differential case consists of pinion and side
gears, and a pinion shaft. The differential case is
supported in the transaxle by tapered roller bearings
(Fig. 212).
OPERATION
The differential assembly is driven by the transfer
shaft by way of the differential ring gear. The ring
gear drives the differential case, and the case drives
the driveshafts through the differential gears. The
differential pinion and side gears are supported in
the case by thrust washers and a pinion shaft. Dif-
ferential pinion and side gears make it possible for
front tires to rotate at different speeds while corner-
ing.
Fig. 211 Input Clutch Assembly
1 - INPUT SHAFT
2 - UNDERDRIVE CLUTCH
3 - OVERDRIVE CLUTCH
4 - REVERSE CLUTCH
5 - OVERDRIVE SHAFT
6 - UNDERDRIVE SHAFT
Fig. 212 Differential Assembly
1 - DIFFERENTIAL CASE
2 - RING GEAR
3 - TRANSFER SHAFT
4 - PINION GEAR
5 - PINION SHAFT
6 - SIDE GEAR
21 - 94
41AE/TE AUTOMATIC TRANSAXLE
CS
DRIVING CLUTCHES (Continued)
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст