I recently acquired a 2003 John Deere X475. I'm using it with a snow blower this winter in my business to remove snow. I put about 5 hours on it every storm. Problem is that I have now broke 2 detent caps. last one i lost the entire cap. To make things worse the cap is only available as part of a repair kit AM132338 at a cost of $93. I just bought the second one in 2 weeks. I need to know what is breaking the cap? is it a lac of lube or is the detent shaft too long?