Ascender 4WD L6-4.2L (2003)
Shift Solenoid: Customer Interest
A/T - SES Lamp ON/DTC P0757/Slipping/Poor Performance
TSB SBO4-05-S009
DTC P0757 SET, SES Lamp Illuminated, Poor
Performance Of Transmission, Transmission Slipping
ISSUE DATE: JULY 2004
Affected Vehicles
2003-2004 Isuzu Ascender (US/UT) models equipped with 4L60-E Automatic Transmission.
Service Information
Condition:
Some customers may comment on any of the following conditions:
^
The SES lamp is illuminated.
^
No 3rd and 4th gear.
^
The transmission does not shift correctly.
^
The transmission feels like it shifts to Neutral or a loss of drive occurs.
The vehicle freewheels above 48 km/h (30 mph). High RPM needed to overcome the freewheeling.
Possible Cause:
The most likely cause is chips or debris plugging the bleed orifice of the 2-3 shift solenoid (367). This will cause the transmission to stay in 2nd gear
when 3rd gear is commanded and return to 1st gear when 4th gear is commanded. DTC P0757 may also be set if the 2-3 shift valve (368) or 2-3 shuttle
valve (369) were stuck, restricted and/or hung-up in its bore.
Correction:
^
Inspect / Clean the 2-3 shift valve (368), the 2-3 shuttle valve (369) and the valve bore of debris / metal chips.
^
Inspect / Clean the 2-3 shift solenoid (367) opening of debris / metal chips. While inspecting the 2-3 shift solenoid (367), look for a screen over the
solenoid opening. If the solenoid DOES NOT have a screen, replace the solenoid with P/N 8-10478-131-0 that does have a screen over the solenoid
opening.
Service Procedure
Refer to the appropriate Service Manual for additional diagnostic and service procedure information.
Parts Information
Warranty Claim Information