Pontiac FIREBIRD 1972 Service Manual page 871

7D-2 1972 PONTIAC SERVICE MANUAL
2. Rear reverse idler gear bushings and/or idler shaft
worn or damaged.
3. Reverse speed gear worn or damaged.
NOISY IN NEUTRAL
Clutch gear bearing or pilot bearing damaged.
HARD SHIFTING
Loose bolts at transmission outer shifter levers.
Bent shift control rods, loose trunnions or linkage
interference.
Clutch improperly adjusted.
Shifter levers, shifter shafts or shift forks worn or
damaged.
Incorrect lubricant.
Synchronizer assemblies worn or damaged.
EXCESSIVE BACKLASH I N SECOND
GEAR ONLY
1. Mainshaft rear bearing and/or locating ring and/or
rear bearing retainer not properly installed.
2. Countershaft rear bearing rollers and/or counter-
shaft worn or damaged.
EXCESSIVE BACKLASH IN ALL
REDUCTION GEARS
1. Countershaft gear bushings worn.
2. Excessive end play in countershaft gear because of
worn countershaft thrust washers.
STICKS I N GEAR
1. Clutch improperly adjusted.
2. Incorrect lubricant or low lubricant level.
3.
Defective (tight) mainshaft front bearing rollers.
4. 4th speed synchronizer blocker ring frozen on main
drive gear cone.
5. Burred or battered clutching teeth on synchronizer
sleeve and/or main drive gear.
SLIPS OUT OF HIGH GEAR
Shift control rods out of adjustment, bent worn or
loose.
Transmission misaligned, loose or dirt between trans-
mission case and clutch housing.
Damaged pilot bearing.
Clutch gear bearing retainer broken or loose.
SLIPS OUT OF REVERSE GEAR
1. Shift control rods out of adjustment, bent, worn or
loose.
2. Reverse gear damaged because of worn or damaged
reverse shifter fork or shifter shaft lever, reverse con-
trol rod bent or interference, etc.
FORWARD GEARS CLASH
Excessive engine idle speed.
Clutch not fully releasing.
Weak or broken synchronizer springs.
Worn synchronizer blocker rings and/or cone sur-
faces.
Broken synchronizer blocker rings.
Excessive rock of synchronizer assembly on main-
shaft.
REVERSE GEAR CLASHES
Allow approximately three seconds after depressing
clutch pedal before shifting into reverse gear. If gear
clash is still present: