Yep the six speed came out in 05. The 3.07 is standard with the 3.73 optional. Mine is an 05 with the six speed and 3.73 trac loc.jeepthis said:I thought some X's have the 6 speed. If it's the 6 speed, he has the 3.07 gears. I'm pretty sure that the 6 speeds came out in 05. Anyways, that's too big of meats on those axles. I would try and find a rear 44 with some better gears.