Originally Posted by still in school
I'm about to pull the trigger on ordering a set of UD60 for my JKU project and was wondering which gearing was best suited if I'm ultimately planning on an LS swap/6L80 down the line? I'll be running 40's and the factory TC (non-rubi). I was under the impression that the 4:88 was ideal but I've also read of some people with a similar setup, happy with the 5:38 gearing. Thoughts? What are you LS guys running?
Need more information. Which engine? You mention the 6l80 transmission which is a great transmission; however, so now is the 8 speed which requires different gearing.
Where are you driving, sea level in Florida or 8,000 feet in Utah?
Do you crawl or just run trails? Heavy trailer?
The 6.0 and 6.2's require different gearing than the 5.3. The Gen V LT engines are different yet.
My experience is most guys gear too steep and loose mpg, there's nothing wrong dropping into 5th occasionally.
Our online instructions have a gear section for reference.
For general use, off-road and highway:
But again the weight, drag, lift, trailer, altitude.... all come into play.