Win the indicated challenges on any difficulty setting in Ford Challenge mode to unlock corresponding shield. To view the shields select 'Driver Details' followed by 'Trophies'.

Unlock Concepts Shield:
Win ALL Concepts Challenges.

Unlock Generations Shield:
Win ALL Generations Challenges.

Unlock Thunderbirds Shield:
Win ALL Thunderbirds Challenges.

Unlock Mustangs Shield:
Win ALL Mustangs Challenges.

Unlock SVT Shield:
Win ALL SVT Challenges.

Unlock Trucks Shield:
Win ALL Trucks Challenges.

Unlock GT Shield:
Win ALL GT Challenges.