differential JEEP WRANGLER 2015 Owners Manual

TRAC-LOK® REAR AXLE — IF EQUIPPED
The Trac-Lok® rear axle provides a constant driving force
to both rear wheels and reduces wheel spin caused by the
loss of traction at one driving wheel. If traction differs
between the two rear wheels, the differential automati-
cally proportions the usable torque by providing more
torque to the wheel that has traction.
Trac-Lok® is especially helpful during slippery driving
conditions. With both rear wheels on a slippery surface, a
slight application of the accelerator will supply maxi-
mum traction.

When inESC Full Off mode, ESC and TCS, except for
the Brake Limited Differential (BLD) feature described in
the TCS section, are turned off until the vehicle reaches
an approximate speed of 40 mph (64 km/h). For speeds
at or exceeding approximately 40 mph (64 km/h) the ESC
goes into ESC Partial Off. When the vehicle speed drops below 35 mph (56 km/h), the ESC system goes back to
ESC Full Off. To turn ESC on again, momentarily press
the ESC OFF switch. This will restore normal “ESC On”
mode of operation. The
ESC Off Indicator Light” will
always be illuminated when ESC is in ESC Partial Off
and ESC full Off.

4L Range (4WD Models)
ESC Full Off
This is the normal operating mode for ESC in 4L range.
Whenever the vehicle is started in 4L range, or the
transfer case (if equipped) is shifted from 4H range or
NEUTRAL to 4L range, the ESC system will be in this
mode. In 4L range, ESC and TCS, except for the Brake
Limited Differential (BLD) feature described in the TCS
section, are turned off until the vehicle reaches an ap-
proximate speed of 40 mph (64 km/h). For speeds at or
exceeding approximately 40 mph (64 km/h) the ESC goes
intoESC Partial Off When the vehicle speed drops
below 35 mph (56 km/h), the ESC system goes back to
ESC Full Off. The ESC is in ESC Full Offat low vehicle
speeds in 4L range so that it will not interfere with
off-road driving, but the ESC function returns to provide
the stability feature at speeds above 40 mph (64 km/h). The “ESC OFF Indicator Light” will always be illumi-
nated in 4L range when ESC is in
ESC Full OfforESC
Partial Off.
NOTE: The “ESC OFF” message will display and an
audible chime will sound when the shift lever is placed in
the PARK position from any position other than PARK,
and then moved out of the PARK position. This will
occur even if the message was previously cleared.