Roadsafe 4wd Diff Drop Kit for Nissan Navara D22!!! FREE FREIGHT !!! Diff Drop Kit Nissan Navara D22 When lifting IFS vehicles, the Constant Velocity or CV joints are put on an increased angle. This increased angle of the CV joint during operation can accelerate the wear on the joint, as well as putting additional stress on the CV boots leading to splitting & eventually premature failure of the CV. This wear is accelerated further if larger wider wheels & tyres are fitted. The Roadsafe Navara D22