Clutch Housing Alignment - Jeep 1979 CJ-5 Technical & Service Manual

2A-10 C L U T C H
C L U T C H HOUSING ALIGNMENT
Clutch housing misalignment is caused by excessive
face or bore runout of the clutch housing or housing-to-
transmission adapter. Misalignment will cause im-
proper clutch release, driven plate failure, front trans-
mission bearing failure, premature crankshaft pilot
bushing wear, and clutch noise and vibration. In severe
cases, misalignment will also cause gear jump-out on
deceleration. If these malfunctions occur, the rear face
and bore of the clutch housing or housing-to-transmis-
sion adapter must be checked for excessive runout.
Alignment Check—Without Transmission Adapter
N O T E : Use the following procedure when the vehicle is
not equipped with a clutch housing-to-transmission
adapter.
(1) Remove transmission as outlined in Chapter 2B.
(2) Remove clutch housing, clutch cover, and driven
plate.
(3) Remove one flywheel attaching bolt.
(4) Obtain 1/2-20 X 9-Inch bolt and 1/2-20 nut for
use as dial indicator support.
(5) Thread nut onto bolt until 10 or 12 bolt threads
are exposed.
(6) Thread bolt into crankshaft attaching bolt hole
and tighten nut to secure bolt.
(7) Install clutch housing on engine and tighten
housing attaching bolts to specified torque. Refer to
Specifications.
(8) Mount dial indicator on 9-inch bolt. Indicator
stylus must contact rear face of clutch housing approx-
imately 1/8 inch from edge of bore (fig. 2A-5).
41478
Fig. 2A-5 M o u i A | Dial tatotor
(9) Rotate crankshaft and check face runout of
housing. Face runout must not exceed 0.010 inch (0.25
mm) total indicator reading at any point throughout 360
degrees rotation.
N O T E : Crankshaft end play must be held to zero to
obtain an accurate face runout reading. Move and hold
the crankshaft forward or rearward using a pry bar to
remove end play.
(10) If face runout is over specified limits, correct
runout as follows:
(a) Move dial indicator aside and loosen clutch
housing attaching bolts.
(b) Insert shims between housing and engine-
to-housing spacer as required to correct runout (fig. 2A-
6). Install shims at points A to align top of housing with
bottom of housing. Install shims at points B, D, C, or E
to correct runout at either side of clutch housing. Shims
installed at points D and E will also align housing from
bottom to top.
A
Fig. 2A-6 Shim Placement (Six-Cylinder Engine Shown)
(c) Tighten housing attaching bolts to specified
torque.
(d) Reposition dial indicator stylus on housing
face and recheck face runout.
(e) Total face runout of clutch housing must not
exceed 0.010 inch (0.25 mm). Relocate shims as neces-
sary to correct runout.
(11) Check clutch housing bore alignment by posi-
tioning dial indicator stylus on inside diameter of hous-
ing bore.
(12) Hold crankshaft end play to zero, rotate crank-
shaft and note dial indicator reading at four equally
spaced points. Bore runout must not exceed 0.010 inch
(0.25 mm) total indicator reading at any point.