ill add my help if i can , i have 14k miles on my 2012 teryx4 which is similar.
you said you run 4wd mostly, so does all 4 tires stop spinning when this bang happens or only front tires disengage?
answer a few questions and i might have the issue fixed for you, ill try at least. little experience of my own
2012 T4 LE HL 2" LIFT 26.5 X 12 SKINNY/WIDE COMBO PITBULL ROCKER XOR UBER ROCKER TIRES ON STEEL OEM WHEELS, KAWI HALF WINDSHIELD, FULL 1/2" FACTORY UTV UHMW SKIDS, SUPERWINCH TERRA 45 WINCH, VISION X LIGHTS, GARAGE PRODUCTS FULL BUSHING KIT KAWI REAR BOX, KAWI A ARM GUARDS,KAWI REAR BUMPER, DAYSTAR JEEP SWITCH PANEL WITH UTV INC SWITCHES