2015 Sportsman 1000 gear problems

I bought a brand new 2015 Sportsman 1000. Before I even put a mile on it I put 28 inch tires on it with a clutch kit rated for 29.5’s. I added a 2 inch lift, snorkels and relocated the radiator. The first day I rode it I broke the front two axles. I got those fixed and the next week while going through some thick mud, I heard something pop. I thought it was another axle but all four tires were still turning. Then I realized that I had no reverse. My gear selector would not move. I attempted to winch myself out and that freed my gear selector to where I could shift it into low. Now my high and low works just fine but I still don’t have reverse. Any idea what this could be??

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