Here is the link that I used.

Crawler Gears

sometimes you have to support the people who do make the upgrades for our monteros or you might not even have that if they don't sell.

my brother and I both got them from this website a while back.

Mine in 2007, Mark in 2009.

oh and by the way, these t-case gears are almost required for off roading if you don't want to overheat your transmission, especially if running 33s or larger and carry a lot of weight. I have 35s and the truck weighed in at 7600 lbs and not once did my AT light come on during the summer heat in Moab.

4.90 R&P are easy to find and don't have to be custom made.......t-case gears are custom made and could eventually not be available in the future.

the 4.90s are in the gen III monteros as well as some of the montero sport models.......junk yards have them all over the place.