Rear gets stuck at highest gear

[bgrayburn]

My rear derailer gets stuck on the highest gear and clicks like crazy at this gear. In every other gear things are just peachy. I have to lift the derailer off the largest gear and move it manually back into the working range of motion. I'm sure I need to provide more info, but I'm at a loss for what. Oh it's an SRAM derailer.

Thank you!

[xerxes]

When you say "the largest gear" do you mean the largest sprocket?

If so, how much slack is there in the chain, or is it really tight when it's on the largest sprocket?