Jeep 1997 Grand Cherokee Service Manual page 59

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181 FBI AXLE . . . . . . . . . . . . . . . . . . . . . . . . . . 15
194 RBI AXLE . . . . . . . . . . . . . . . . . . . . . . . . . 50
GENERAL INFORMATION
FRONT PROPELLER SHAFT . . . . . . . . . . . . . . . 2
LUBRICATION . . . . . . . . . . . . . . . . . . . . . . . . . . 3
PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . 3
PROPELLER SHAFT JOINT ANGLE . . . . . . . . . . 2
PROPELLER SHAFT JOINTS . . . . . . . . . . . . . . . 2
PROPELLER SHAFTS . . . . . . . . . . . . . . . . . . . . 1
DIAGNOSIS AND TESTING
RUNOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
UNBALANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
VIBRATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
SERVICE PROCEDURES
DRIVELINE ANGLE MEASUREMENT
PREPARATION . . . . . . . . . . . . . . . . . . . . . . . . 6
PROPELLER SHAFT ANGLE MEASUREMENT . . 6
REMOVAL AND INSTALLATION
FRONT PROPELLER SHAFT . . . . . . . . . . . . . . . 7
GENERAL INFORMATION
PROPELLER SHAFTS
The function of a propeller shaft is to transmit
power from one point to another in a smooth action.
The shaft is designed to send torque through an
angle from the transmission (transfer case on 4WD
vehicles) to the axle (Fig. 1).
The propeller shaft must operate through con-
stantly changing relative angles between the trans-
mission and axle. It must also be capable of changing
length while transmitting torque. The axle rides sus-
pended by springs in a floating motion. This means
the propeller shaft must be able to change angles
when going over various roads. This is accomplished
through universal joints, which permit the propeller
shaft to operate at different angles. The slip joints (or
yokes) permit contraction or expansion.
DIFFERENTIAL AND DRIVELINE
CONTENTS
PROPELLER SHAFTS
DIFFERENTIAL AND DRIVELINE
page
216 RBA AXLE . . . . . . . . . . . . . . . . . . . . . . . . . 87
PROPELLER SHAFTS . . . . . . . . . . . . . . . . . . . . . 1
INDEX
page
REAR PROPELLER SHAFT . . . . . . . . . . . . . . . . 8
DISASSEMBLY AND ASSEMBLY
DOUBLE CARDAN JOINT
SINGLE CARDAN UNIVERSAL JOINT . . . . . . . . 8
CLEANING AND INSPECTION
SINGLE AND DOUBLE CARDAN JOINT . . . . . . 13
ADJUSTMENTS
AXLE PINION ANGLE ADJUSTMENT . . . . . . . . 13
FRONT PROPELLER SHAFT
MEASUREMENT . . . . . . . . . . . . . . . . . . . . . . 13
SPECIFICATIONS
TORQUE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
SPECIAL TOOLS
PROPELLER SHAFT . . . . . . . . . . . . . . . . . . . . 14
Tubular propeller shafts are balanced by the man-
ufacturer with weights spot welded to the tube.
The propeller shaft is designed and built with the
yoke lugs in line with each other which is called
phasing. This design produces the smoothest running
condition. An out of phase shaft can cause a vibra-
tion.
Before undercoating a vehicle, the propeller
shaft and the U-joints should be covered. This
will prevent the undercoating from causing an
out of balance condition and vibration.
CAUTION: Use exact replacement parts for attach-
ing the propeller shafts. This will ensure safe oper-
ation. The specified torque must always be applied
when tightening the fasteners.
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