(14) Remove th e transmission oil filter (1) and
o-ring from th e electrohydrau lic control unit.
(15) Clea n t he inside of the oil pa n (3) of any
debris. Inspect the oil pan ga sket (2) and repla ce if
necessar y.
(16) Install a new oil filter (1) and o-ring int o the
electrohydr aulic control u nit .
(17) Install th e oil pa n (3) and ga sket (2) onto the
transmission .
(18) Install the oil pan bolt s (5) and ret ain ers (4).
Torque the bolts t o 8 N·m (70 in .lbs.).
(19) Lower the vehicle and add 7.0 L (7.4 qts.) of
transmission fluid to th e transmission.
(20) Check the oil level (Refer t o 21 - TRANSMIS-
SION/AUTOMATIC - NAG1/FLUID AND F ILTER -
STANDARD PROCE DURE - CH ECK OIL LEVE L).
FREEWH EELI N G CLU T CH
DESCRIPTION
Freewheeling clutches (Fig. 154) a re inst alled in
the front planetar y gea r set between the sun gear
and the sta tor shaft, and i n th e rear planet ary gea r
set bet ween the su n gear and t he intermediate shaft .
The freewheel consists of an outer ra ce (4), an
inner race (7), a nu mber of lockin g elements (3) and
a cage (6) for these locking element s.
OPERATION
The freewh eeling clutch (Fig. 155) optimizes indi-
vidual gear sh ifts. They lock in dividu al elem ents of a
planet ary gear set together or against the tra nsmis-
sion housing in one direct ion of rot ation to allow t he
torqu e to be tra nsmitted.
If t he inner ra ce (7) of the freewheelin g clut ch is
locked and the ou ter ra ce (4) turn s cou nter-clockwise
(1), the lockin g element s (3) a dopt a dia gona l position
on a ccount of their specia l cont ours, a llowing the
freewh eel function. The inn er race (4) slides un der
the locking elemen ts (3) with minimal friction . If the
rotation of t he outer race (4) changes to clockwise (2),
the locking elements (3) stand u p and lock the outer
and inner r aces (4, 7) toget her.
Fig. 154 Freewheeling Clutch
1 - ROTATION DIRECTION “A$
2 - ROTATION DIRECTION “B$
3 - LOCKING ELEMENTS
4 - OUTER RACE
5 - FRONT OR REAR SUN GEAR
6 - LOCKING ELEMENT CAGE
7 - INNER RACE
Fig. 155 Freewheeling Clutch
1 - ROTATION DIRECTION “A$
2 - ROTATION DIRECTION “B$
3 - LOCKING ELEMENTS
4 - OUTER RACE
5 - FRONT OR REAR SUN GEAR
6 - LOCKING ELEMENT CAGE
7 - INNER RACE
VA AUTOMATIC TRANSMISSION NAG1 - SERVICE INFORMATION 21 - 135
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