I have a 1999 3/4 ton 4x4 ext cab. There is a grinding niose in the rear axle could be inner bearings. I'm towing a 14,000 lb camper and would like to have the 1 ton axle. Do i have to swap out the front also? Is this something i can do without spending a million to do it? Will the brakes be compatable with my master cylinder? Can i keep my axle and improve the guts? HELP the BLUE OX is down for the count any info would be great.