I've owned this rzr for 8 years and have done regular fluid maintenance. Built the transmission, front transfer case, upgraded the axles, custom roll cage, solid doors, beadlock wheels, upgraded seats, exhaust, stereo, 4-point harnesses, winch, and high clearance arms. Probably other upgrades as well. Spent a lot of time in Moab. No sand dunes. 3700 miles. Nice machine and reliable.