So I keep having to replace my starter, engine is a 454... I take it in and its proven to be a bad starter. What can cause a starter to go bad? I got it from autozone(those guys sure do know alot about cars ) and its a remade one, but I'm going on my 3rd starter tomorrow thanks to the warranty I'm not paying too much. But the first time I put it in and it failed on me, 2nd I had a mechanic drop it in lasted about 2wks and since sunday I have to wack it with a hammer to get it going but it still grins and hurts my ears... Any suggestions when I drop my 3rd one in tomorrow? thanks for the time reading this hope u can help me out.