speedometer cable question

Just know if you use anything like any kind of grease.....something that's non-dry, you will have a gummy mess eventually. As the cable breaks in and wears with the outer housing, bits of both will get into the lube and create a gummy mess. Sometimes you're lucky and it has no effect. Other times it will lead to the needle bouncing because the gummy mess is trying to grab the spinning cable inside the housing. Graphite is all I use for that reason.