When a character changes races within their faction, some of their character-specific information is translated into those of their new race when appropriate.

Reputations

When a character changes races, their home city reputation level is swapped for the home city of their new race. For example, if a Night Elf character changed races to become a Draenei, the character's reputation levels with Darnassus and Exodar would switch values. All other reputations would remain as they were.

Mounts

When a character changes races (without changing factions), the character’s racial mounts (such as Kodos for Tauren) are switched for the racial mounts of their new race. Other mounts, including the discontinued epic mounts such as the Ivory Raptor or Ancient Frostsaber, are not affected.

 
Blizzard.com
Blizzard.com
statue