This online resource library can answer most of the questions you might have. The library offers manuals, photos, videos and other useful information to help solve your issues and is organized by topic for quick referencing.
Simply select a category from the list on the lower right column. You can see the subcategories if you click on the arrows to the right of your category.
SRAM hub is not shifting correctly
The clickbox needs adjusting
Customer Service Rep Tim Link shows you how: