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Old 08-04-2014, 10:08 PM   #1
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Rough country 2.5/4" lift kit questions

Have a 92 yj islander that I am looking to lift but don't know whether to go 2.5 or 4". From my small knowledge I believe I can put a 2.5" lift on without having to replace much of anything. If I put a 4" lift on is there going to be a lot of stuff that needs replaced in the suspension/other workings of the car? I believe that I will be getting 31" tires on 15" wheels if that makes any difference. My brother who owns a 98 Cherokee said that if I get aftermarket shackles It will add another inch or so to the lift. Is that true for the yj aswell? Thanks
Jack

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Old 08-04-2014, 10:17 PM   #2
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You've got a good idea on your plan. I just did a 2" lift and ended up having to order a transfer case drop kit due to driveline vibrations. I run 31's and it is the perfect amount of lift and good look for those tires in my opinion. You can order longer shackles as well as your brother said to lift the jeep higher but like you said you will get into more work. Drop pitman arm for steering and possibly needing an SYE.

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Old 08-05-2014, 07:17 AM   #3
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Where is that mark when you have to start worrying about SYE and the pitman arm?
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Old 08-05-2014, 07:23 AM   #4
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Every Jeep is different on how it reacts to its lift kit but a general rule of thumb is anything 4 inches and up needs these items. You can get away with a transfer case drop at 4 inches sometimes, but like I said every Jeep is different. Pitman arm is a for sure thing though, it comes with 4 inch kits. I would also suggest a replacement of the steering stabilizer regardless of the lift height.
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Old 08-05-2014, 08:37 AM   #5
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I did the 2.5 RC lift and found, after install, that the brake lines were kinda tight, but I could still drive it. So, my next mod was extended brake lines. I also had a slight vibration, so, the next mod was a drop kit for the transfer case. (All the while, it is still drive-able, but I wouldn't want to take it wheelin').
I also notice that I will probably need to address my steering issue in the future. Next mod may be a drop pitman arm.
YJ Sean is right, each application varies, but the basic kit, allowing for 31" tires, will get you started. Just be aware, there may be more to do, maybe not. But that's the fun of it!
And don't forget the Jeep moto: Just Empty Every Pocket!
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Old 08-08-2014, 11:01 AM   #6
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Just did the 4" lift on my 95YJ a few weeks ago. The kit came with the T-case drop and pitman arm drop. Broke two Pitman arm pullers before i took it to a shop and paid $40 for them to change it out, well worth the money considering i spent about three hours trying to remove the old one. Went with the 4" to be able to put on 33" tires. Drives great now (springs were pretty much inverted before the lift), no drive line or shifting issues. Also did brakes, sway bar disconnects, removed trac bars, extended brake lines, and steering stabilizer. Pretty convenient to make all those changes at one time. Make sure you have access to an angle grinder, breaker bar, and a BFH. PB blast the hell out of everything the week leading up to the lift. Good luck and happy lifting
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Old 08-14-2014, 11:05 PM   #7
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Just did a RC 4" lift. Broke 5 of the 6 crossmember bolts off. The crossmember itself was shot.Ended up making my own dropped crossmember. I still have the RC 1" drop bars and all the bolts. Anyone interested in it, PM me.
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Old 08-15-2014, 03:54 AM   #8
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Did a 4" RC myself. If the spring hanger bolts are frozen a 4" grinder with a cutoff wheel is your friend. Sean made a great point. Every Jeep will respond differently to being lifted. I had to cut 1" off the tub after installing the TC drop. 2,4, & reverse were not usable. I have some bad driveline vibes even with the TC drop.

No worries. I have a 1" BL, 1"MML, belly up, SYE & CV shaft to fix that issue.

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