Thanks for the replies yall. Im getting the true trac with 4.10 gears with bearings and shims and oil. Also new bearings in the hubs with labor for $2,450 at pyle bros in baytown tx. Its seems expensive but its really not that much money for oem parts to be installed by a first rate shop. I know im not going to be listening to gears whine and grind for 3 months and take it back to the shop 3 times for "adjustment". I hope so at least. Ill post when its done. I really like the idea of awesome traction with dually tires. Its a heavy steel flatbed so thatll help it even more.