Sram shifting up problems and ticking noises

odichu
odichu Posts: 116
edited September 2010 in Workshop
First thing is that shifting up in both large and small rings works lovely, however shifting down I can feel that the chain is skipping a sprocket sometimes and sometimes the derailleur is moving the chain accross but the chain ends up on the same spocket it started on (with a full single gear shift on the lever). I've checked and rechecked the cable tension, both derailleur screws, the cassette isn't loose. I'm at a loss as to what it could be. Any ideas?

Also when turning the cranks I'm getting a intermittent tick......tick..tick............tick noise either from the cassette or chain running over the spockets, can't really tell, could anyone suggest what it might be and how to get rid of it?

O