Clutch Drag Or Inadequate Release - Jeep 1979 CJ-5 Technical & Service Manual

2A-4 CLUTCH
(a) Clean oil and dirt from cover using mineral
spirits and allow cover to air dry.
(b) Sand pressure plate surface lightly using
fine emery cloth.
(c) Lubricate cover release lever pivots and
check and adjust release lever height as necessary.
CAUTION: Apply lubricant to the pivots sparingly.
Excessive lubrication could result in grease con-
tamination of the driven plate and pressure plate
surfaces.
(11) Check throwout bearing mounting surface of
transmission front bearing cap for galling, deep scores,
or roughness. Install throwout bearing on bearing cap
and check for smooth fore/aft movement. Replace bear-
ing or bearing cap as necessary if bind occurs. Fill
throwout bearing groove with chassis grease and apply
thin coat of grease to bearing mounting surface of front
bearing cap.
CAUTION: The throwout bearing used with the T-150
transmission has retaining springs which position the
bearing on the throwout lever. Check these springs for
distortion, loss of tension, or for being bent or broken.
Replace the bearing if these springs are damaged. Also,
when installing the bearing, be sure the retaining pro-
jections on the throwout lever are properly engaged in
the retaining holes in the bearing sleeve.
NOTE: Do not replace the throwout bearing unless it is
actually defective or damaged. Refer to Clutch Area
Noises.
(12) Apply thin film of chassis grease to transmis-
sion clutch shaft splines. Do not apply grease to shaft
pilot hub.
(13) Install pilot bushing and lubricating wick.
(14) Install clutch components and transmission. Re-
fer to Clutch Installation.
(15) Lower vehicle.
Clutch Drag Or Inadequate Release
Clutch drag can be described as a condition in which
the clutch driven plate, and consequently the transmis-
sion clutch shaft, does not come to a complete stop after
the clutch pedal is depressed (clutch disengaged). Clutch
drag can cause gear clash when shifting into reverse or
hard or difficult shifting. Check clutch operation as
follows.
NOTE: Occasionally, the clutch driven plate and clutch
shaft will require approximately 5 seconds to lose mo-
mentum and come to a complete stop after initial clutch
disengagement. This is normal and should not be mis-
taken for clutch drag.
(1) Start engine, depress clutch pedal fully, and
shift transmission into first gear.
(2) Shift transmission into neutral but do not re-
lease clutch pedal.
(3) Wait 5 to 10 seconds and shift transmission into
reverse. If shift is smooth with no gear clash, clutch
operation is normal. If shifting into reverse produces
gear clash, proceed to next step.
(4) Raise vehicle on hoist. Check clutch linkage for
binding, worn, broken or bent components. Lubricate or
replace as necessary. If components are in good oper-
ating condition, proceed to next step. If one or more
problems were discovered and repaired, lower vehicle
and repeat steps (1) through (3). If clutch now operates
correctly, stop repair. If clutch drag persists, proceed to
next step.
(5) Remove transmission and clutch components.
Refer to Clutch Removal.
N O T E : Whenever the transmission is removed, also
remove the pilot bushing lubricating wick, soak the wick
in engine oil, and reinstall the wick before assembly.
(6) Observe wear pattern on driven plate. If wear
pattern is uneven (e.g., two areas heavily worn on one
side, two only partially wrrn on opposite side), or has
opposing wear patterns on front and reverse side, the
driven plate is warped and should be replaced.
(7) Inspect clutch cover assembly. If clutch cover
assembly has worn, bent, or broken release levers or
lever pivots, is heavily scored, or warped, replace clutch
cover assembly. If cover assembly does not exhibit any
of these conditions, do not replace it.
(a) Clean oil and dirt from clutch cover with
solvent and allow cover to air dry.
(b) Sand pressure plate surface lightly using
fine emery cloth.
(c) Lubricate cover release lever pivots with
chassis grease.
NOTE: Apply lubricant to pivots sparingly. Excessive
lubricant could result in grease contamination of pres-
sure plate and driven plate surfaces.
(8) Check and adjust clutch cover release lever
height as necessary.
NOTE: If the release lever height cannot be adjusted,
the release lever(s) are bent. Replace the clutch cover.
(9) Inspect crankshaft pilot bushing for heavy scor-
ing, angular wear pattern, or discoloration. Replace as
necessary. Be sure to soak bushing in engine oil before
installation.
NOTE: If the pilot bushing displays an angular-type
wear pattern, check and correct clutch housing align-
ment before proceeding. Refer to Clutch Housing
Alignment.
(10) Inspect condition of splines on transmission
clutch shaft and in driven plate hub. If severely worn,
galled, or corroded, replace clutch shaft or driven plate.