Subaru IMPREZA 2004 Service Manual page 24

MANUAL TRANSMISSION AND DIFFERENTIAL
E: INSPECTION
Disassembled parts should be washed clean first
and then inspected carefully.
1) Bearing
Replace the bearings in the following cases.
• Worn, rusted and damaged bearing
• Bearings that fail to turn smoothly or make ab-
normal noise when turned
• Bearings having other defects
2) Bushing (each gear)
Replace the bushings in the following case.
• When the sliding surface is damaged or abnor-
mally worn.
3) Gears
Replace the gears in the following cases.
• Gear teeth surfaces are broken or excessively
worn.
• Parts that contact the baulk ring is damaged.
• The inner surface of gear is damaged.
4) Baulk ring, synchro cone
Replace the baulk ring and synchro cone in the fol-
lowing case:
• Worn, rusted and damaged baulk ring
5) Shifting insert key
Replace the shifting insert key if deformed, exces-
sively worn or defective in any way.
Driven Gear Assembly
F: ADJUSTMENT
1) Measure length "H", which is from transmission
case and oil pump cover mating surface to ball
bearing edge.
2) Using the following equation, calculate the
washer thickness of driven gear assembly.
T=H – {5.8±0.05 mm (0.23±0.002 in)} – {0.1 to 0.3
mm (0.0039 to 0.0118 in)}
5.8±0.05 mm
(0.23±0.002 in)
0.1 to 0.3 mm
(0.0039 to 0.0118 in)
3) Select 0 to 3 washers from the following table to
adjust backlash closest to specification.
Backlash specification at axial direction of driv-
en gear assembly:
MT-00581
0.1 — 0.3 mm (0.0039 — 0.0118 in)
6MT-92
(A) Transmission case
(B) Ball bearing
(C) Driven gear assembly
t Thickness of washer
Length from transmission case and
H oil pump cover mating surface to ball
bearing edge
Thickness of collar
Backlash specification at axial direc-
tion of driven gear assembly
Washer
Part No. Thickness
803072030
803072031
803072032
803072033
(A)
(C)
(B)
MT-00616
t mm (in)
0.15 (0.0059)
0.30 (0.0118)
0.45 (0.0177)
0.60 (0.0236)