Isuzu N-Series. Service manual — part 955
7B-56 Automatic Transmission (Smoother)
2. Inspect the counter shaft front bearing. If it needs
to be replaced with a new one due to wear or
damage, use a grip (5-8840-0007-0) and installer
(5-8840-2026-0) to press-fit the bearing outer race.
3. Inspect the clutch housing bushing. If it needs to be
replaced with a new one due to wear or damage,
use an installer (5-8840-2755-0) to press-fit.
• Before installing, carefully remove all
protrusions from the bore side of the old
caulking.
Legend
1. Front Oil Seal
3. ENG Mark
2. T/M Mark
N7A1102E
N7A1103E
N7A1104E
Automatic Transmission (Smoother) 7B-57
• Before installing, securely caulk at three points,
avoiding the old caulking points and grooves.
• For the second and subsequent press-fitting,
the notched part should face in the direction of
the clutch housing.
• After press-fitting, check that the shift rod slides
smoothly.
4. Install the main shaft assembly, top gear shaft
assembly, and counter shaft assembly.
a. Use a lashing belt or some other belt from a
lashing device to bundle the main shaft
assembly, counter shaft assembly, and top
gear shaft assembly at two points so they
cannot separate. Tighten the belt securely.
When handing the top gear shaft, take care that
it does not drop.
b. Stand the top gear shaft assembly, main shaft
assembly, and counter shaft assembly on a
support stand with the top gear shaft assembly
on top.
c. Wrap the main shaft with tape to avoid damage
to the front oil seal.
d. While using snap ring pliers to open the top
gear shaft bearing outer snap ring, which
already has been set on the clutch housing,
insert the top gear shaft, counter shaft, and
shaft rod into their appropriate positions in the
clutch housing.
Caution:
• Confirm that the snap ring is installed properly.
N7A1105E
N7A1095E
N7A1107E
N7A1108E
7B-58 Automatic Transmission (Smoother)
• Work carefully in order to avoid damaging the front
oil seal.
5. Install the magnet in the clutch housing.
6. Install the 5th relay lever in the clutch housing.
Tighten:
44 N
⋅m (4.5 kg⋅m / 32.5 lb⋅ft)
7. Inspect the 4th — 5th shift arm bushing. If it needs
to be replaced with a new one due to wear or
damage, use an installer (5-8840-2755-0) to press-
fit with a press.
8. Inspect the 2nd — 3rd shift arm bushing. If it needs
to be replaced with a new one due to wear or
damage, use an installer (5-8840-2755-0) to press-
fit with a press.
• Before installing, carefully remove all
protrusions from the bore side of the old
caulking.
• Press-fit the shift arm bushing taking care to
use the correct orientation and angle. Caulk at
three points, avoiding the bushing gap and old
caulking.
• After press-fitting, check that the shift rod slides
smoothly.
9. Install the 4th — 5th shift arm (7), 1st — Reverse
shift block (5), 2nd — 3rd shift arm (4), 1st —
Reverse shift arm (2), 1st — Reverse and 2nd —
and 3rd shift rod (1).
• Use a hammer to drive the spring pins (3), (6)
into the spring pin holes.
• When press-fitting spring pins, insert a round
bar on the opposite side of the shift rod, and
press-fit while taking care to avoid damage to
other parts.
N7A1109E
N7A1110E
Automatic Transmission (Smoother) 7B-59
10. Install the 4th — 5th sub shift block (3), 4th — 5th
main shift block (2), 3rd — 4th shift block (1).
• Use a hammer to drive the spring pins (4), (5)
into the spring pin holes.
• When press-fitting spring pins, insert a round
bar on the opposite side of the shift rod, and
press-fit while taking care to avoid damage to
other parts.
11. Apply Three Bond TB1215 to the mating surface of
the transmission case and clutch housing, and
install to the clutch housing.
• Before applying the Three Bond, remove all
moisture and oil from the contact surface. Use
a bead diameter of at least 2mm across the
entire surface, ensuring there are no gaps.
Tighten:
46 N
⋅m (4.7 kg⋅m / 33.9 lb⋅ft)
N7A0333E
N7A0334E
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