I believe the Rubicon is always worth it, unless the end goal is a rebuilt rock crawler with a new multi speed transfer case, D60 or bigger axles..., ultimately a trailer queen.
For the TJ/LJ's you get aluminum 16" wheels, a 4:1 Xcase, D44 front and rear, 4.10 gears, rear limited slip and front and rear air lockers in the TJ/LJ, rear disks in lieu of drums for some years (?)
For JK's the differences are 17" aluminum wheels, 4:1 Xcase, D44 front (all have D44 rears,) 4.10 gears, electricly controled sway bar disconnect - manual or electric disconnects are essential for rock crawling but also great for off road ride, and electric lockers front and rear.
JK's ride a hell of a lot better than TJ/LJ's due to suspension design, accomodate larger tires stock or with any given lift height, are easier to lift...
A TJ with 4.10's and 35" tires is going to be a dog. My LJ Rubicon with 33's and 4.10's could use re-gearing because of its roof rack and added skid weight, it'd be fine without the added skids or roof rack. 35's really require re-gearing to 4.56's or 4.88's to maintain reasonable highway performance. I believe that 33"X10" or so tires are about optimal for TJ/LJ's anyway. The 255/85X16" BFG KM2 MT's would be a fine tires at about 33"x10".
I would inspect every candidate and crawl under, looking for the tell tales of lots of offroading, like scratches, dents and gravel or mud on top of the skids - and then steer clear of a candidate that shows more than a few signs of having been off road.
When weeding out candidates don't forget to test the 4wd, both high and low ranges, and the lockers too.
I would try to find a soccer mom driven, mall crawling JK four door Rubicon, it would be the perfect candidate.
JPK
For the TJ/LJ's you get aluminum 16" wheels, a 4:1 Xcase, D44 front and rear, 4.10 gears, rear limited slip and front and rear air lockers in the TJ/LJ, rear disks in lieu of drums for some years (?)
For JK's the differences are 17" aluminum wheels, 4:1 Xcase, D44 front (all have D44 rears,) 4.10 gears, electricly controled sway bar disconnect - manual or electric disconnects are essential for rock crawling but also great for off road ride, and electric lockers front and rear.
JK's ride a hell of a lot better than TJ/LJ's due to suspension design, accomodate larger tires stock or with any given lift height, are easier to lift...
A TJ with 4.10's and 35" tires is going to be a dog. My LJ Rubicon with 33's and 4.10's could use re-gearing because of its roof rack and added skid weight, it'd be fine without the added skids or roof rack. 35's really require re-gearing to 4.56's or 4.88's to maintain reasonable highway performance. I believe that 33"X10" or so tires are about optimal for TJ/LJ's anyway. The 255/85X16" BFG KM2 MT's would be a fine tires at about 33"x10".
I would inspect every candidate and crawl under, looking for the tell tales of lots of offroading, like scratches, dents and gravel or mud on top of the skids - and then steer clear of a candidate that shows more than a few signs of having been off road.
When weeding out candidates don't forget to test the 4wd, both high and low ranges, and the lockers too.
I would try to find a soccer mom driven, mall crawling JK four door Rubicon, it would be the perfect candidate.
JPK
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