help with speedo

[boatpuller]

my speedometer has made noise on and off for years.i pull the cable squirt some lube in there,and it's o.k for awhile.i haven't had to do it in a long time.i was getting a loud screeching sound.now after reinstall .i'm getting a horrible snap and pop.bad enough to where you need to totaly unhook it.i can't rememeber if you have to push the upper speedo clip in to insert in the back or not.mine just snaps in without pushing the clip in.but,you gotta push the clip to remove it.about ready to leave it unhooked since it's way off anyway due to tire size.any ideas?