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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 >> Harsh Shifts ("D4" To "D3", "D2" Or "D1")

Harsh Shifts ("D4" To "D3", "D2" Or "D1")

Overrun clutch return spring assembly not working. Plugged overrun clutch housing check ball. Snap ring not seated.