IB16-F-001A

BULLETIN NUMBER:
IB16-F-001A
IMPORTANT SERVICE
INFORMATION FOR:
 SERVICE MANAGER
 SERVICE ADVISOR
 TECHNICIAN
 PARTS DEPARTMENT
 WARRANTY PERSONNEL
ISSUE DATE:
AUGUST 2016
GROUP:
DRIVELINE/AXLE
LIMITED SLIP DIFFERENTIAL CHATTERING NOISE
AFFECTED VEHICLES
• 2011-2017MY Isuzu N-Series Vehicles
Equipped with 5.2L (4HK1) Diesel Engine and Limited Slip Differential (LSD)
option code IV0
This bulletin supersedes information bulletin IB16-F-001. This bulletin is being revised to
update Model Years. Please disregard previous bulletin IB16-F-001.
INFORMATION
CONDITION
Some customers of N-series vehicles may complain of an audible clicking or chattering noise
coming from the rear of the vehicle while making tight turns. This condition may be due to
incorrect axle fluid installed at the last scheduled maintenance or during a previous repair. The
condition can also result from delayed or skipped maintenance resulting in degradation of axle
fluid.
See Figures 1 and 2 in this bulletin to identify a limited slip differential or check the vehicle build
in IVIS, (Isuzu Vehicle Information System,) for Option Code IV0.
To resolve this problem, follow the listed procedure:
1. Replace the differential gear oil with a commercially-available gear oil (SAE90 GL-5) in
addition to 20oz of limited slip differential lubricant additive (P/N 8-01052-358-0 (quantity
of five (5), 4oz bottles).
2. Road test the vehicle for at least 10 miles by making eight to ten tight left and right turns,
such as going around a corner, to ensure the limited slip is activated.
3. If the condition persists, technicians are to call the Technical Assistance Center (TAC) at
1-877-ISUZUCV (1-877-478-9828), Select a language, at Prompt press "3” to speak
directly to a TAC Specialist for further assistance.
LSD Stamp
Codes
B7
D8
D9
H0
H9
Figure 1 – Code Location
Figure 2 – Example of Stamping