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Old 06-29-2010, 12:48 PM   #1
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Tips for installing 4" lift kit

Hey guys, So I picked up some leftover parts from a friend of mine. He had a 4" suspension lift kit with his 1988 yj and went to a 6" with a conversion in the front to coils. I got a 87 yj and he gave me his front and rear leaf springs, U-bolts, shocks and some other misc stuff, I don't know where they belong. I was going to have professionals install it for me but when I realized I was missing parts like the sway bar links, track bar brackets, transfer case lowering kit, and I checked to see if the shocks were good which they weren't I have just decided to go buy the parts i need and install it myself.

I got two questions, is a new pitman arm for the 4" lift needed or can I just use my current pitman arm? Also I need tips and anything else you guys think I might need so I wont have a rough suspension and I get a smooth ride out of this.

-I'll post up some picks of my yj and the parts I got

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Old 06-29-2010, 01:14 PM   #2
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Here are the pics






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Old 06-29-2010, 01:26 PM   #3
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Google for "YJ lift instructions".
First item I saw: http://www.roughcountry.com/install/620S.pdf
Should give an idea of where/how parts are installed. Kits and insructions vary a lot between vendors. The one above shows relocating the rear sway bar while others say "just remove". As to the pitman arm, make sure the finished angle of the drag link matches (parallels) the sway bar in order to avoid bump steer.
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Old 06-29-2010, 08:30 PM   #4
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Get yourself a drop pitman arm (or spend the money and just improve all your steering. Loose the sway bar & track bar (d.o.t. garbage that you dont need and inhibit your off road ability). A good set of leaf springs are self centering (especially lift springs) and if you avoid lift shackles you wont need any of 'em. Make sure and measure, measure, measure when setting your springs on your axles front to back and side to side. Also you may need new U bolts if yours are a booger and you have to cut them off... PS: take the springs off the shackles first THEN the shackles off the frame.
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Old 06-29-2010, 10:19 PM   #5
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In the pic, the top springs go in the rear. The little ramp on them is what gives the proper angle for the drive shaft. I no longer have my front or rear track bars installed, and when I removed them, the ride improved. Depending on how used the springs are, you may also want to replace the rubber bushings. I would replace the u-bolts with new ones regardless of how good they may look. They are holding your Jeep to everything else. It is cheap insurance. When you choose shocks, I recommend hydraulic shocks over the nitrogen shocks. I had the nitro shocks and the ride was a bit rough. Go with the hydros and the ride is better.
I don't think you will ever get a very smooth ride with leaf springs, but it is a Jeep after all. Good luck and show us some pics after the install.

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Old 06-30-2010, 01:03 AM   #6
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Thanks guy's My jeep is an everyday use vehicle not only off-road so are you sure i dont need the track bars and the swar bar links?
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Old 06-30-2010, 11:22 AM   #7
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Just take em off and if you decide you want em back on later, put em back on. The brackets should be cheap, and if nothing else should be easy to make...

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