it'll be the cv joint, but you've got to make sure if it's the inner or outer one (outer is more likely)

make sure you get a new boot kit with it as well but before you do, open the boot up, don't tear it unles it's alraedy torn open, and splodge a bit of grease into it

if the grease inside is horrible bogey green then it's mixed with water and you may need to clean it out by dismantling the joint first, remember that there are 2 circlips to hold in position and if you open it up too far they tend to distort a little and need to be tapped back into place upon reassembly

make sure you can rotate the wheel as you undo tham as when you undo them, remove the boot first and undo the one at the bottom as this will be the easiest to undo

make sure the handbrake is on to stop the wheel from turning and they should be T45 bolts

just remember that they are specific for the 2wd cars as they are bigger and the balls inside sit in the cage one way only, so if you can clean it up wihtout popping the balls out then all the better

wipe the rud off and then leave it in a bowl of petrol to break up the crap, then put loads of grease all over the place inside it, fit it to the shaft, fit the whole thing to the car, then pump in a load more grease just to make sure

then put your boot on as the last thing as the boot actually gets in the way of the bolts you have ot tighten up

hth