There is with yours, you have x-drive so you can disconnect the actuator on the transfer case.

For the OP, best way would be to take out the transfer case and all associated hardware, and just have RWD. Actually, the best way would be to sell the X5 and buy an E39 touring.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue