i-350 L5-3.5L (2006)
Accumulator: All Technical Service Bulletins
A/T - 4L60-E Harsh 1-2 Upshift
Information IB05-05-S012
4L60-E Automatic Transmission Diagnostic Information on Harsh 1-2 Upshift
ISSUE DATE: NOVEMBER 19, 2005
Affected Vehicles:
2003-2006 Isuzu Ascender (US/UT)
2006 Isuzu i-280/i-350 (TI) with Automatic Transmission
Service Information
The following four conditions have been found to cause the majority of consistent, harsh 1-2 shift comments.
Chips/Sediment/Debris/Contamination found in the valve body, 1-2 accumulator valve (371) bore, may cause the 1-2 accumulator valve to stick or
hang-up.
Chips/Sediment/Debris/Contamination found in the valve body, 4-3 sequence valve (383) bore, may cause the 4-3 sequence valve to stick or hang-up.
