SB-12-K-002

SB-10050139-3912
BULLETIN NUMBER:
SB12-K-002
IMPORTANT SERVICE
INFORMATION FOR:
 SERVICE MANAGER
 SERVICE ADVISOR
 TECHNICIAN
 PARTS DEPARTMENT
 WARRANTY PERSONNEL
ISSUE DATE:
DECEMBER 2012
GROUP:
TRANSMISSION
AISIN TRANSMISSION BREATHER HOSE RESTRICTION – UPDATED VENT
AFFECTED VEHICLES
 2007-2012MY Isuzu N-Series
 2007-2010MY Chevrolet/GMC W-Series
Equipped with AISIN A460/A465 Automatic Transmission
CONDITION
Some customers may complain about automatic transmission fluid leaking from the top
of the transmission dipstick tube. This condition is commonly caused by a restriction in
the transmission breather. Isuzu investigation of this restriction has found common
causes to be insect nesting and/or debris left by flooding. In order to reduce the
likelihood of this condition, Isuzu has introduced a newly designed breather hose vent.
Should you have a customer experiencing the above condition and find it to be caused
by a restriction in the breather hose, install the new breather hose vent as outlined in
the service procedure in this bulletin.
SERVICE PROCEDURE
1. Remove the transmission breather hose.
a. Remove the hose clamp and reuse for install.
b. Remove the P-clamp and discard along with the old hose.
(A)
(B)
Figure 1 – Original Breather Hose Location
A. P-Clip
B. Hose Clamp
2. Install the trans vent hose into the air breather hose clip.
a. The hose must be placed into the top of the guide so the end touches
the wall.
b. The clip should be closed by locking the six latches.
IMPORTANT: Be sure to set the hose on the inside back of the clip, as
shown in Figure 2a. If improperly set on the lid side, it will allow the
hose to move and become pinched.
INSIDE OF BACK CLIP
LID SIDE
Figure 2a – Air Breather Hose Clip Assembly, Open
Figure 2b – Air Breather Hose Clip Assembly, Closed
(locking points shown)
3. Install the A/T breather bracket - offset at a 60° angle and torque to 30.3~50.4
Nm (22.36 lb ft~37.19 lb ft).
60 degrees
Figure 3 – Installed A/T Breather Bracket
2
4. Install the air breather hose clip and vent hose that was assembled in Step 2, to
the A/T breather bracket.
a. Reuse the hose clamp that was removed in Step 1.
Figure 4 – Final Installation
PARTS INFORMATION
The following new parts are available from AIPDN:
Part Number
8-98161881-0
8-98177486-0
0-02807270-0
Description
Air Breather Hose Clip
Breather, A/T Bracket
Trans Vent Hose
Qty
1
1
1
WARRANTY INFORMATION
As this condition is not due to manufacture defect, the repair is not covered under
warranty.
However, should an Isuzu representative decide to cover the repair as an act of good
will, contact your DSPM for final approval.
Labor Operation Code
K6132
Description
Breather Hose Relocate
Labor Time
0.2
3