Pontiac Fiero 1988 Service Manual page 862

MUNCIE 282 (5-SPEED) MANUAL TRANSAXLE 7B3-1
SECTION 7B3
MUNCIE 282 FIVE-SPEED MANUAL
TRANSAXLE
RPO'S MG1 AND MG2
CONTENTS
General Description
7B3-1
Diagnosis
7B3-5
Maintenance and Adjustment . . . .
7B3-8
Checking Transaxle Mounts 7B3-8
Cable Adjustment Procedure 7B3-8
Checking Fluid Level . . . .. 7B3-9
On-Vehicle Service
7B3-9
Transmission Shift Cables 7B3-9
Shifter Assembly 7B3-10
Shift and Select Cables . . . . . . . . . . . . . . . . . 7B3-10
Transaxle Shift Levers and Brackets 7B3-10
Manual Transaxle . . . . . . . . . . . . . . . . . . . . . . 7B3-11
Rear Transaxle Mount 7B3-12
Front Transaxle Mount 7B3-12
• Axle Shaft Seals . . . . . . . . . . . . . . . . . . . . . . 7B3-13
Shift Shaft Seal 7B346
Clutch Shaft and/or Bushings 7B3-16
Special Tools . . . . . . . . . . . . . . . . . . . . . . . . .
7B3-17
GENERAL DESCRIPTION
The Muncie 282 (five-speed) transaxle assembly
is a constant-mesh design transmission. Combined in
the assembly are all forward gears, reverse gear, and
the differential output. Selection and shifting is
accomplished by a combination of synchronizers with
blocker rings controlled by sliding rail shift forks.
Reverse gear is non-synchronized with the idler gear
supported on a sliding spindle idler shaft.
The basic components of this unit are:
• Transmission case
• Clutch and differential case
• Input shaft and gears
m Output shaft and gears
• Ring gear and differential assembly
Unique features of the Muncie (five-speed)
transaxle are:
• Fifth speed overdrive
• Needle bearing support of speed gears
• Sintered bronze synchronizers
• Hard finished gears with laser welded clutch
teeth rings
• Low-drag ball bearing support of input shaft
m Individual sliding shift rails for each shift fork
The differential is a conventional arrangement of
gears that is supported by tapered roller bearings. The
final output gear (an integral part of the output shaft)
turns the ring gear and differential assembly, thereby
turning the drive axle shafts.
The shifter cables are called select and shift
cables. When one cable moves the other cable should
be stationary. The shifter cables are pressed on the
shifter ball studs. The shifter cables are attached at the
transaxle levers with nuts on the cable ball studs. The
shifter cables are adjustable at the transaxle levers.
The cradle and transaxle are attached. The cra-
dle swings down for transaxle rempval. The cradle
has two forward and rear mounts bolted to the frame.
The engine has two lower mounts with studs attaching
to the cradle. The engine has one rear upper strut
mount. When installing the "motor and transaxle
mounts be certain the mounts are aligned to the center
of the mounts. Alignment of mounts will keep the
driveline centered in installation. Refer to Section 2A
for cradle alignment.
Transaxle to engine attachment is accomplished
with three bolts and three studs. The bolts and studs
pass through the transaxle clutch housing into the
engine bosses.
The shift and select cables are routed rearward
through the passenger compartment into the engine
compartment. The inner cables are attached to the
shifter with retainer clips. The cables in the engine
compartment are attached to the transaxle shift levers
with nuts on cable ball studs.
The transaxle has an inhibitor built into the shift
linkage to prevent a shift from fifth gear into reverse.