Caterpillar Fault Code
Free · no signupMID 027 CID 0368 FMI 02
Harsh Shifts / Transmission Slip
System
Transmission
Symptom
Harsh Shifts / Transmission Slip
Diagnosis & fix steps
LOGIC: Transmission Auto-Retarder Pressure Switch Signal Erratic.
ACTION: Inspect hydraulic pressure switch on the transmission retarder control valve. Test for switch continuity bounce under pressure cycling; replace switch if internal diaphragm is leaking oil.
Red Seal field insights
Downhill Braking: ARC (Automatic Retarder Control) modulates wet disc brakes down steep pit ramps; an erratic switch signal drops retarder automation, pushing heavy thermal loads onto service brakes.
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