My front differential is make noise because of a leak. I have been watching videos how to disengage the front differential and make it a 2 wheel rear wheel drive only ( I don't need 4 wheel drive). Have anyone done this or any reason it should not work? I have a 2006 Trailblazer LT Sport Utility 4-Door 4.2L 256Cu. In. Any help will be greatly appreciated.