Dodge ram truck 3500 1996 Service Manual page 67

DIFFERENTIAL AND DRIVELINE 3 -1
DIFFERENTIAL AND DRIVELINE
C O N T E N T S
I t i
page page
FRONT AXLE—MODEL 44/60 15 PROPELLER SHAFTS 1
MODEL 60/70/80 AXLES 79 REAR AXLE—MODEL 9 1/4 51
P R O P E L L E R S H A F T S
INDEX
page
G E N E R A L INFORMATION
CENTER BEARING 2
LUBRICATION 2
PRECAUTIONS 2
PROPELLER SHAFTS 1
UNIVERSAL JOINTS 2
DIAGNOSIS AND TESTING
RUNOUT 4
UNBALANCE 3
VIBRATION 3
S E R V I C E P R O C E D U R E S
INSPECTION 5
MEASUREMENT—TWO-PIECE SHAFT 6
PROPELLER SHAFT ANGLE MEASUREMENT . . . 5
UNIVERSAL JOINT ANGLE
4
REMOVAL AND INSTALLATION
FRONT PROPELLER SHAFT 7
G E N E R A L I N F O R M A T I O N
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.
The propeller shaft must operate through con­
stantly changing relative angles between the trans­
mission and axle. I t 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.
page
REAR PROPELLER SHAFT . . . . . . . . . . . . . . . . . 7
T W O PIECE PROPELLER SHAFT—REAR . . . . . . 8
DISASSEMBLY AND ASSEMBLY
CENTER BEARING
8
DOUBLE CARDAN (CV) 10
SINGLE CARDAN . 9
CLEANING AND INSPECTION
SINGLE AND DOUBLE CARDAN JOINT . . . . . . . 13
ADJUSTMENTS
ADJUSTMENT
AT
AXLE
W I T H
LEAF SPRINGS .
1 4
CENTER BEARING ADJUSTMENT—TWO
PIECE SHAFT
14
SPECIFICATIONS
TORQUE . . . . . . . . . . 14
S P E C I A L T O O L S
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.