Fluid - Jeep cherokee 2000 Service Manual

21 - 220 AW–4 AUTOMATIC TRANSMISSION
DESCRIPTION AND OPERATION (Continued)
FIRST/SECOND/THIRD/REVERSE GEAR COMPONENTS
First through third and reverse gear components
are outlined in (Fig. 3).
The input shaft is meshed with the direct clutch
hub and the forward clutch drum. These elements
rotate as a unit. The forward clutch hub rotates as a
unit with the front planetary ring gear. The direct
clutch drum is meshed with the forward end of the
planetary sun gear.
The second brake hub serves as the outer race of
one–way clutch No. 1. The clutch inner race is locked
with the front/rear sun gear. The inner race of one–
way clutch No. 2 is splined to the transmission case
and is locked. The outer race rotates as a unit with
the rear planetary carrier.
The rear planetary ring gear is splined to the out-
put shaft. The front planetary carrier and rear car-
rier ring gear are meshed and rotate as a unit with
the output shaft.
FOURTH GEAR OVERDRIVE COMPONENTS
The overdrive system consists of the input shaft,
one–way clutch, planetary sun gear, ring gear, plan-
etary carrier, overdrive clutch and overdrive brake
(Fig. 4). The overdrive elements are controlled and
1 – 2ND COAST BRAKE
2 – DIRECT CLUTCH
3 – FORWARD CLUTCH
4 – FRONT PLANETARY RING GEAR
5 – SECOND BRAKE
6 – FIRST/REVERSE BRAKE
7 – REAR PLANETARY CARRIER
Fig. 3 First/Second/Third/Reverse Gear Components
applied through transmission valve body solenoid
number two.
In fourth gear, the overdrive brake prevents the
overdrive sun gear from turning. The overdrive input
shaft and planetary carrier rotate as a unit. The sun
gear and overdrive direct clutch drum are in mesh
and operate as a single unit. The direct clutch
splines function as the hub for the overdrive brake.
The one–way clutch outer race is in mesh with the
planetary carrier. The inner race is fixed to the sun
gear shaft.

FLUID

NOTE: Refer to the maintenance schedules in
Group 0, Lubrication and Maintenance for the rec-
ommended maintenance (fluid/filter change) inter-
vals for this transmission.
NOTE: Refer to Service Procedures in this group
for fluid level checking procedures.
DESCRIPTION
Mopar Dexron IIE/Mercon is the recommended
fluid for the AW-4 automatic transmissions.
8 – REAR PLANETARY RING GEAR
9 – OUTPUT SHAFT
10 – FRONT & REAR PLANETARY SUN GEAR
11 – ONE-WAY CLUTCH NO. 2
12 – ONE-WAY CLUTCH NO. 1
13 – FRONT PLANETARY CARRIER
14 – INPUT SHAFT
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