2025 Bronco Sport Big Bend – Full Transmission Replacement at 13k Miles (Output Planetary Failure)

Hey everyone,

Wanted to share my experience and see if anyone else has dealt with this.

Vehicle:
2025 Bronco Sport Big Bend
4WD
Automatic
13,000 miles

I was experiencing the following symptoms:

• Delayed 1–3, 3–4, and 4–5 shifts
• Shift flare in 5th gear
• No warning lights or stored DTCs

Dealer performed diagnostics. No codes present. Fluid level was full but described as dark/metallic.
Road test verified concern. They performed reset strategy and adaptive relearn, no change.
Final…

2025 Bronco Sport Big Bend – Full Transmission Replacement at 13k Miles (Output Planetary Failure)