Hi, I have replaced starter 3 times, with the last one being the new heavy duty starter and idler gear. Was working great for 500 miles, now the gear did not break, it broke the case and outer cover now. Has anybody figured out a repair for this? It will cost $1400.00 for parts only. What I am afraid of, is this going to be a normal problem. Appears the heavy duty replacement parts worked but the case did not hold up. HELP?