OPERATING RANGES
NV244 operating ranges are:
•
AWD(All-Wheel Drive)
•
4HI (Part-time)
•
4LO
•
NEUTRAL
The AWD mode can be used at any time and on any road surface.
The 4HI (Part-time) and 4LO ranges are for off road use only. The only time these ranges can be used is when the
road surface is covered with snow, ice, or other loose slippery material.
SHIFT MECHANISM
Operating ranges are selected with a dash mounted shift selector switch. The shift selector switch provides a input
to the Transfer Case Control Module (TCCM) to indicate the driver’s desire to change operating ranges. The TCCM
uses this input, along with the input from the transfer case mounted mode sensor and information from the vehicle’s
bus, to determine if a shift is permitted. If the TCCM decides the shift is permitted, the TCCM controls the shift
motor, mounted to the exterior of the transfer case, to perform the shift.
IDENTIFICATION
A circular ID tag (1) is attached to the rear case of
each transfer case. The ID tag provides the transfer
case model number, assembly number, serial number,
and low range ratio.
The transfer case serial number also represents the
date of build.
OPERATION
The input gear is splined to the transmission output shaft. The input gear drives the mainshaft through the planetary
assembly and range sleeve. The front output shaft is operated by a drive chain that connects the shaft to a drive
sprocket on the mainshaft. The drive sprocket is engaged/disengaged by the mode fork, which operates the mode
sleeve and hub. The sleeve and hub are not equipped with a synchronizer mechanism for shifting.
21 - 916
TRANSFER CASE - NV244
ND