Delete that forwarder of texasdragracing.com and wait for it to clear the system.
Then Add A New Domain that's Fully Hosted. Call it texasdragracing.com
It'll create a texasdragracing.com folder in your home directory. The same place as the texasdragracing.dreamhosters.com folder. This new folder will be empty.
Then rename the new folder as tdr.com (or something else) just to get it out of the way. Rename that dreamhosters.com folder as texasdragracing.com so it'll now be the real site with real content.
Once your real site is up and running as texasdragracing.com, you can delete that Fully Hosted dreamhosters domain. To catch the people still using the dreamhosters domain, create a Forwarding/Redirect dreamhosters domain that sends people to your real texasdragracing.com domain.