I have a stock 2001 Dakota 9.25 rear axle with factory 3.55 gears. I need to swap to 4.56 so I can actually use 5th gear. I have never done a gear swap. I have been reading as much as I can but still unsure if there is a brand I should stay away from. I see there is some price differences shopping around but not much to compare as to why? can anyone shed some light on this? Also I have read that some people putting the 9.25 back together are using a GM pinion nut as it locks down better. Im having trouble nailing down what the part number is. Any help would be appreciated.