Nissan Terrano r20e. Manual - part 319
q
B
Was the vehicle moved in one
direction after the vehicle was
driven in another direction when
the transfer lever was in the “4H”
or the “4L” position and then
returned to the “2H” position?
No
E
Yes
Auto-hub gears will disengage
with a resultant noise (clicking). If
the distance the vehicle is moved
in the opposite direction is short
[less than 1 m (3 ft)] or if the rota-
tion angle of the left and right
wheels is not the same (as in
rounding a corner), gears on one
side will disengage (Fig.
).
Under this condition, a noise
(crushing, etc.) might occur while
driving in the “2H” position. If only
gears on one side are unlocked,
the locked drive shaft rotates at
the same speed as wheels;
however, the unlocked drive shaft
is made to rotate in the reverse
direction by the differential. This
forces by auto hub’s slide gear to
lock in the reverse direction. As a
result, noise occurs.
If this happens, slowly move the
vehicle straight back approxi-
mately 2 to 3 m (7 to 10 ft) with
the transfer lever in the “2H” posi-
tion to disengage the gears on the
other side.
Was the vehicle driven with the
transfer lever in the “2H” position
in extremely cold weather?
No
E
Yes
In extremely cold weather (areas),
the viscosity of differential oil is
greater than in moderate weather.
When the auto hubs are unlocked
with the transfer lever set to the
“2H” position, one auto hub can
sometimes remain locked.
This causes noise during opera-
tion. Noise can also occur in the
auto hub when the front propeller
shaft is rotated due to the viscos-
ity resistance of the transfer fluid
(Fig.
).
In such a case, drive in the “4H”
position for approximately 10 min-
utes until the vehicle warms up,
and return the transfer lever to the
“2H” position to eliminate the
noise.
Disassemble and check the auto
hub.
(Refer to “Removal and
Installation”, FA-18.)
NFA005
SFA525A
H
H
H
FRONT AXLE — Auto-lock Free-running Hub
Trouble-shooting (Cont’d)
FA-17