Shift Quality - Harsh Upshift Detected

What this code means

The TCM detected shift quality parameters outside acceptable range during upshifts. Shift flare or bind-up is occurring.

Symptoms

• Check Engine Light
• Harsh 1-2 or 2-3 upshift
• Vehicle jerks during upshift
• Passengers feel impact during shifts
• Delayed then sudden engagement
• Driveline clunk on shifts

Common causes

• Worn shift solenoid
• Incorrect line pressure
• Accumulator piston wear
• Valve body bore wear
• Transmission fluid degradation

Diagnostic steps

1. Monitor shift time and quality PIDs
2. Check line pressure at each gear
3. Inspect shift solenoids electrically
4. Review TCM shift adaptation values
5. Perform fluid and filter service

Repair notes

Replace shift solenoids or valve body. Transmission fluid service may help in early stages. Reset shift adaptations after repair.

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