G,day Mark, we have got two JKs. Both are 6 months old both autos and both petrol pentastars.
One has 2 " DBOR lift & 33"s and the other has the DBOR 4.5"wild kit with all the fruit and 37"s. Both have front, rear bars, winch, sliders etc.
I have had a couple of highly modded Rangie comp trucks and am happy with the JK. I get about 480kms to a tank of fuel on 37"s with standard ratios and it goes/drives the same as the JK we have on 33"s (JK with 33"s is getting about the same km's to a tank city driving).
I guess it depends on what you want to do with your JK as to wether you get a Rubi or Sport. The reason I went with the sport was after doing some research and talking to a lot of people, I wanted to run 37"s and engineer the JK so it was legal with 37''s (is the only legal modded 4WD I have had lol) so the D30 & D44 will be coming out and in will go D60s so couldn't justify the expense for the Rubi seeing I am pulling out the diffs to run D60's.
Also I have heard that the D44 housing isn't any stronger than a D30 housing so after sending heaps of money strengthening Rangie diffs and axles with KAM lockers, Maxi Drive axles, KAM CV's tubing and sleeving housings, KAM C/W & Pinions, machining swivel housings etc I figured D60"s were a better option than spending money strengthening the D44's. After the money saved by not buying the Rubi and then having to strengthening the front D44 diff housing, changing ratios etc D60's work out to the same cost.
Just my opinion.
Cheers and good luck, Im sure you will be happy with your new Jeep.
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