How to redownload previously downloaded or purchased content to your Xbox 360
If you need to redownload an item that you’ve previously downloaded, you can do so at no additional charge.
Redownload content on your Xbox 360 console
Sign in to Xbox Live on your console using the gamertag that you used when you originally purchased the content.
Go to settings and select Account.
Select Download History.
Browse your download history and find the item you want to download again.
Select the item, and then select Download Again.
Add the content to the download queue on your Xbox 360
On a device that’s connected to the Internet, go to Purchase History and sign in with your Microsoft account (email and password).
Browse for the item that you want to download again, and then click Add to queue. This adds the item to your console's download queue.
Turn on your console and connect to Xbox Live. The item will begin downloading.
Note Downloading previously purchased content to a different Xbox 360 console does not transfer the content's license. If you want to use content without signing in to Xbox Live, you must transfer the content license to the console. For information on how to transfer licenses, see Can’t play or use previously downloaded content on Xbox 360.