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Home >> GMC >> 1995 >> Forward Control 4.3 Z, Standard >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Automatic Transmission Overhaul - 4L80-E >> Trouble Shooting >> Symptom Diagnosis >> Incorrect Shift Points

Incorrect Shift Points

Problem related to PCM or TCM signal inputs from TPS, speed sensors or pressure switch assembly. Faulty Digital Ratio Adapter (DRAC on 2WD only). Incorrect tire size, axle ratio or PROM.