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Home >> GMC >> 1993 >> Forward Control 7.4 N >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Automatic Transmission - Overhaul & Testing - 4L80E >> Trouble Shooting >> Symptom Diagnosis >> Starts in 4th Gear

Starts in 4th Gear

Solenoid "B" stuck on. Dirt in filter, PCM or TCM signal wire grounded. Possible trouble Code 86.

NOTE: Digital ratio adapter receives signals from electronic speedometer and sends them to PCM/TCM.
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