4 1/2" Rubicon Lift

Thanks Bill, that link looks to be very helpful, given the instructions given with the lift. Not too complicated, but still tryin to figure if I need to use the degree shims for the front axle, and how that all works. Big end in rear or front, etc..

mine is a 89 YJ.....

mine is a 89 YJ.....

You have to keep the faces of the U-joint yokes parallel in the back and point the front diff one directly at the t-case because the front driveshaft has a double cardan joint. So likely you have to tip the back of the front up.

The rear ones want to be parallel or say =| |= or =/ /=. Folks use an angle finder to get them right.

Mike

86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's

"Robb S via CarKB.com" wrote:

thats funny...LOL

Robb, I see Rubicon's instructions for the 4.5" kit haven't impreoved! :-)

The "Big" end of the springs, that is, the military wrap, mounts to the spring hangers on the frame, the smaller end goes to the shackle end. Both ends have the same size bushings. Rubicon doesn't make this clear at all in their instructions, but I clarified it with them over the phone when I installed this kit on my '94 a few years ago.

The 2.5 degree shims are to go on both the front and the rear, however I'd never use an aluminum shim to begin with, particularly on the front end. You should be able to get 2 - 3 degree steel shims from a local alignment shop. If not, you can for sure get them from Poison Spyder Customs in Denver. Because of the 1" longer shackles that come with this kit, the front caster will be shot to hell and it will handle like $#!t unless you add the caster back in.

If you haven't done so yet, this is a good time to install an SYE kit in your xfer case, with a CV rear driveshaft. Rather than fool with the shims have your spring perches cut loose and align the pinion properly. You can then toss the xfer case drop pucks in the trash.

This is a superb, flexy kit and the springs hold up very well. FWIW, I tossed the Rubicon shackles and installed Mountain Off Road's versions, which are much stouter.

yeah, not by much though. Mine are 4" Shims as well. Just so you know, they did change the directions and tell you (pic too) which end for the springs now...I put the thick part in the front of the axle. Bills link was excellent. The way I see it on mine, is that I do Not have the cv driveline, (YET) and putting the wedge in the rear, tilts the pinion up. Putting it in the front keeps it level with the transfer case. At least on mine thats what it appears to be.... Thanks everyone..... Robb