Does anybody have the Terra flex 4:1 kit installed behind their AX15? I am also wondering how hard this would be to do myself? Or any other options out there to get a 4:1 or higher T-case ratio that you guys know of? Aside from spending a few grand on an Atlas II.
You can't go above something like 20mph in 4lo with the teralow kit because it starves the planetary gears of oil or something like that. I have been looking for a 241OR transfer case from a Rubicon to swap in. Its a stronger case with 4:1 and a fixed yoke stock.
That you can't drive faster than 20 mph in 4Lo is due to that causing the gears in the planetary to overspin. Which is no big deal since if you can drive that fast, there's no need to be in 4Lo. My best advice is if you're wanting to shift from 2nd to 3rd or higher while in 4Lo, it's time to shift back into 4Hi or 2WD.
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I'm running the Tera low 4:1. And love it. It's great for crawling and can save a lot of wear on your clutch. Install was easy but I did have some experience rebuilding a 231 Tcase and installing an SYE... And as stated above you won't be able to move very fast in 4lo. However what's the need. Go to 2 or 4hi...