6. Check slip joints for spline wear by moving the
sleeve-yoke and splined shaft back and forth;
see Fig. 3. If the slip joint can be twisted in a
clockwise, or counterclockwise movement
greater than 0.007 inch (0.18 mm), replace both
the sleeve-yoke and the splined shaft.
7. Examine the driveshaft tubes for dents, bends,
twists, or other damage. If any tube appears to
be damaged, refer to Section 41.00 of the
108SD and 114SD Workshop Manual for repair
and replacement instructions.
8. Examine the driveshaft for evidence of missing
balance weights, and for build-up of foreign ma-
terial. Remove any foreign material. If there is
any evidence that balance weights are missing,
remove the driveshaft and have it balanced.
U-Joint Capscrew Torque Specifications
Yoke Capscrew Size Torque: lbf·ft (N·m)
Half-Round Yokes with Bearing Straps (see
Fig. 2, item 8)
0.375" 45–60 (60–80)
0.5" 115–135 (155–183)
12 mm 115–135 (155–183)
Full-Round Yokes with Bearing Cups (
Fig. 4) 0.375" 38–48 (52–65)
Meritor RPL Series U-Joints with Bearing Cups (
Fig. 5) 0.5" 115-135 (155-183)
Table 1, U-Joint Capscrew Torque Specifications
9. For driveshafts with slip joints, check to be sure
the yoke plug is not loose or missing; see
Fig. 6,
item 2. Repair or replace the yoke plug as
needed. If the yoke plug is missing, the splined
shaft may be hitting the plug and knocking it out;
contact your Regional Service Office for assis-
tance in determining the correct driveshaft
length.
41–02 Driveline Lubrication
Universal Joint Lubrication
NOTE: Vehicles equipped with Meritor RPL Se-
ries drivelines do not require periodic lubrication.
1. Park the vehicle on a flat surface, apply the park-
ing brakes, and chock the tires.
2. Wipe all old grease and dirt from each U-joint
grease fitting; see
Fig. 6, item 8.
3. Use a hand-type grease gun, or a high-pressure
gun with a low-pressure adapter, to lubricate
U-joints. If a low-pressure adapter is not used,
U-joints may not receive enough grease.
Using lithium 12-Hydroxy stearate grease (NLGI
Grade 2, with EP additives), lubricate until new
grease can be seen at all four U-joint seals.
Fresh grease must be seen escaping from all
four bearing-cap seals of each U-joint. On full-
round yokes equipped with a bearing cup, if most
of the grease being added to a U-joint can be
seen escaping from just one of the U-joint seals,
check the torque on the capscrews at that seal.
4. Tighten the bearing-cup capscrews 38 to 48 lbf·ft
(52 to 65 N·m) as needed. If the capscrews were
already tight, or all of the U-joint seals still do not
purge, remove the bearing cup at that seal, and
examine the seal for damage. If the seal is dam-
aged, replace the complete U-joint.
5. If grease does not appear at one seal, use a pry-
ing tool to pry the U-joint trunnion away from the
Driveline41
108SD and 114SD Maintenance Manual, September 201541/2
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