Dodge RAM TRUCK 1500 1995 Service Manual page 159

REAR SUSPENSION AND AXLE 3 - 39
CAUTION: When collapsible spacer is used newer
loosen pinion gear nut to decrease pinion gear
bearing preload torque. Never exceed specified pre­
load torque. If preload torque is exceeded a new
collapsible spacer must be installed. The torque se­
quence will have to be repeated.
On Model 60 with a collapsible spacer tighten nut
in small increments until rotating torque is achieved.
Measure the preload torque frequently to avoid
over-tightening the nut.
& Model 60: 292-427 N-m (215-315 ft. lbs.) torque
© Model 70: 298-379 N-m (220-280 ft. lbs.) torque
• Model 80: 597-678 N-m (440-500 ft. lbs.) torque
DIFFERENTIAL
Fig, 41 Torque Yoke
Fig. 42 Pinion Nut
Optional Torque Method Dana 80: Torque pin­
ion nut to 339 N-m (250 ft. lbs.). Then scribe a line
on the yoke 3/8 of an inch from one point of the pin­
ion nut (Fig. 42). Tighten the nut until the point of
the nut lines up with the scribe mark. This will
tighten the nut to the correct torque.
(16) Check bearing preload torque with an inch
pound torque wrench (Fig. 43). The torque necessary
to rotate the pinion gear should be;
• Original Bearings — 1-3 N-m (10-20 in. lbs.)
• New Bearings — 2-5 N-m (20-40 in. lbs.)
Fig. 43 Rotating Torque
Axles equipped with shims, if preload torque is not
within specified tolerance, correct the shim thickness
accordingly (Fig. 44);
• Increase the preload torque, decrease the shim
thickness
• Decrease the preload torque, increase the shim
thickness
RING GEAR BACKLASH AND CONTACT PATTERN
RING GEAR BACKLASH MEASUREMENT
(1) Place Master Differential Bearing case hubs;
• Model 60 and 70: Master Bearings D-343
• Model 80: Master Bearings D-346
(2) Install a pilot stud at the right side of housing.
Attach Dial Indicator C-3339 to the pilot stud. Load
indicator plunger against the back of the ring gear
(Fig. 45). Ensure ring and pinion gear teeth are
tightly meshed. Zero the indicator.
(3) Insert a small pry bar between the bearing cap
and right side of differential case. Pry the case as far
as possible to left side (Fig. 45). Zero the dial indica­
tor pointer.
(4) Repeat the measurement several times to check
consistency. Record the travel distance.