Downshift

Downshift is a multiplayer Commendation in Halo: Reach. A point is obtained every time the player is the driver of a vehicle while a passenger kills an enemy in multiplayer matchmaking. The Commendation is represented by a tire on a blue background.Bungie.net: Halo: Reach Career Stats
===Requirements===
Be a vehicle's driver while a passenger kills an enemy in Multiplayer.
Tier 	Required #
Iron 	5
Bronze	50
Silver	750
Gold 	4,000
Onyx 	8,000
MAX 	20,000
==Sources==