Why is there a grinding sound when I turn over my 94 ford ranger?

Just recently I started to notice my truck would make a terrible grinding sound when I turn over the key. After it turns on it runs perfectly fine. I haven't noticed anything else but that. I don't know what the problem could be.

Take the starter off and check the gear. You may be able to repair the starter if you do it now otherwise a ring gear may be in order which will cost plenty with installation.

Ok thanks!