Dodge RAM 1500 1998 Owner's Manual page 2186

DR
TRANSFER CASE - NV243 (Continued)
IDENTIFICATION
A circular ID tag is attached to the rear case of
each transfer case (Fig. 1). 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 out-
put 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.
DIAGNOSIS AND TESTING - TRANSFER CASE - NV243
Condition
Transfer case difficult to shift or will
not shift into desired range.
Transfer case noisy in all drive
modes.
1 - I.D. TAG
2 - FILL PLUG
3 - DRAIN PLUG
DIAGNOSIS CHART
Possible Cause
1) Transfer case electronically
controlled shift system malfunction.
2) If vehicle was operated for an
extended period in 4HI mode on
dry surface, driveline torque load
may cause difficulty.
3) Insufficient or incorrect lubricant.
4) Internal transfer case
components binding, worn, or
damaged.
1) Insufficient or incorrect lubricant.
2) Internal transfer case
components binding, worn, or
damaged.
TRANSFER CASE - NV243
Fig. 1 Fill/Drain Plug And I.D. Tag Locations
1) Verify proper operation per the
appropriate diagnostic manual.
2) Drive the vehicle in a straight line
and momentarily release the
accelerator. The transfer case can
then be shifted to the desired mode.
3) Drain and refill transfer case with
the correct quantity of Mopar ATF
+4, Automatic Transmission Fluid.
4) Repair or replace components as
necessary.
1) Drain and refill transfer case with
the correct quantity of Mopar ATF
+4, type 9602, Automatic
Transmission Fluid.
2) Repair or replace components as
necessary.
21 - 483
Correction