If you have a 42RLE transmission you can install an Advanced Adapters RubiCrawler unit.
Which costs more than regearing both axles does. . . .
True, but talk to anyone who has one and I don't think they regret installing one
I would regret installing one if my axles were not geared properly first. Not to mention I don't really see the benefit to the Rubicrawler when it's behind an automatic that inherently allows any ultra-low crawl speed that is desired. All the way down to stopped and any speed above that.
In that case, how are . . . [you Rubi-Crawler owners] . . . enjoying (or not enjoying) that Rubi-Crawler. . . ?
Re: Advance Adapers Rubi-Crawler
My '06 LJR is equipped with 42RLE, Rubi-Crawler underdrive, NV241OR 4:1 transfer case, 5.38 axle gears, and 35" tires.
My observations:
1. A Rubi-Crawler requires a 42RLE transmission. Those with Millennial Anti-Theft Devices (manual transmissions) need not apply.
2. Unlike mating a Rubi-Crawler with a 241OR transfer case which results in low ranges of 2.72:1, 4.0:1 and 10:88:1, mating a Rubi-Crawler with a 231 transfer case results in low ranges of 2.72:1 and 7.40:1.
3. It is not a question of gears
or Rubi-Crawler or even which is installed first. They address entirely different issues.
4. The greatest benefit from a Rubi-Crawler is providing a 2.72 "middle" range in addition to the 241OR 4.0:1 low range. Except for technical rock crawling and other extreme circumstances, for most jeepers there will be little utility to the 7.40:1 and 10.88:1 ultra low ranges.
5. The 2.72:1 low range ratio is better suited than 4.0:1 to sand, snow and other environments that require greater wheel speed. It is also better suited to most forest service roads and BLM jeep trails.
6. There are also many situations where a 4.0:1 low range ratio works better, e.g., rock crawling.
7. I enjoy having both 2.72:1 and 4.0:1 low ranges. I use both on almost every trip. As noted above, it isn't a question of gears or underdrive.
8. Two features I like are being able to shift from 2.72:1 2WD to 2.72 4WD on the fly and that the factory lockers and dash indicators work in all three low ranges.
9. It wasn't cheap, but I'm worth it.