SPLINES CV JOINT INTERNAL: There is some confusion in the air! the splines internal to the outer cv joint are covered by the boot and held in place by the circlip. You wouldn't want to use locktite on those: never! The other splines are on the end of the cv joint; the one with the threaded end. There is a debate whether to use loctite on this spot; I don't. Hope that helps. All the best, Phil