Lubrication; Model 208 Shift Pattern—Automatic Transmission; Service Diagnosis - Jeep J-10 Series 1982 Technical & Service Manual

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90513B
Fig. 2D-5 Model 208 Shift Pattern—Automatic Transmission
IDENTIFICATION
An identification tag is attached to the rear half of the
transfer case (fig. 2D-6). This tag provides the transfer
case model number, low range reduction ratio, and as
sembly number. The information on this tag is neces
sary for servicing information. If the tag is removed or
becomes dislodged during service operations, it should
be reattached using an adhesive sealant such as Loctite
312, or equivalent.
LUBRICATION
The model 208 transfer case lubricant should be
changed at the intervals specified in the Maintenance
Schedule. When adding lubricant to or refilling the
transfer case after service, use AMC/Jeep Automatic
Transmission Fluid or equivalent labeled Dexron II*
only. Do not use any type of anti-friction type additives
or similar substance. Use the specified grade of motor
oil only. Refer to the In-Vehicle Service section for lubri
cant change procedures and fill level. Model 208 lubri
cant capacity is 6 pints (3 liters).
POWER FLOW
In all drive range positions input torque is trans
mitted to the transfer case geartrain through the trans
fer case input gear (fig. 2D-7).
In 2H range, torque flows from the input gear to the
planetary assembly and annulus gear which rotate as a
unit. Torque is transferred to the mainshaft through the
planetary carrier which is splined to the mainshaft.
Torque flow continues through the mainshaft and rear
yoke which is splined to the mainshaft, and finally to the
REAR
YOKE
TRANSFER CASE 2D-7
DRAIN
PLUG
FILL
PLUG
90600
Fig. 2D-6 Model 208 Indicator Switch.
Identification Tag and Drain and Fill Plug Location
rear propeller shaft and axle. In 2H range, the sliding
clutch remains in a neutral position and does not lock
the drive sprocket to the mainshaft. As a result, torque
is not transferred to the driven sprocket.
In 4H range, input torque from the input gear is
transmitted through the planetary and annulus gear
and through the mainshaft in exactly the same fashion
as in 2H range. However, in 4H position, the sliding
clutch is shifted forward and into engagement with the
mainshaft clutch gear. This locks the drive sprocket to
the mainshaft through the sliding clutch. Torque is now
transmitted through the drive sprocket to the driven
sprocket by the connecting drive chain. Since the from
output shaft is splined to the driven sprocket, torque
now flows through the front output shaft to the from
propeller shaft and axle resulting in high range four-
wheel drive.
In 4L range, the path of torque through the transfer
case is exactly the same as in 4H range but with one
major difference. In 4L range, the annu.us gear is
shifted forward and into engagement with the lock-
plate. Since the lockplate is fixed in the case, the an
nulus gear is held stationary and does not rotate. This
causes the planetary pinions to rotate about the annulus
gear internal teeth producing a gear reduction ratio of
2.61:1.
SERVICE DIAGNOSIS
Before attempting to repair a suspected transfer case
malfunction, check all other drive line components be
forehand. The actual cause of a problem may be related
to such items as the front hubs, axles, propeller shafts.
wheels and tires, transmission, or clutch instead. If all
other drive line components are in good condition and
operating properly, refer to the Service Diagnosis charts
for further information.