OK. I know everyone seems to have a question about what gear they should run and I do to, but mine is a little different. I have a 2009 GMC 1500 that I am running 40x14.50s on with a 22x12 rim (lift and tires will be on late next week). The issue that is different with mine is that my truck has the new allison 6 speed transmission with the 6.2L gas motor in it. I need to know what the proper gear is for someone that will do no more then 5k miles a year driving mostly in town or on the highway. I was told by one "expert" that a 4:56 with my combo will be 200 rpm's more at 60 mph then what stock is. Does this sound about right? I know a few people on this forum have mentioned 5.11 and 4.88 but I am not really sure if they were throwing out random numbers that wd work on older GMC's with the 5.3 and the other tranny. If anyone has seen or knows of anyone with the same motor/tranny combo as me that has changed their gears then I would love to know what they done. Any help is appreciated.