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-   -   Old Man EMU 2.5" YJ to CJ Suspension Install (http://www.jeepforum.com/forum/f8/old-man-emu-2-5-yj-cj-suspension-install-1245523/)

Matt1981CJ7 07-28-2011 06:33 AM

Old Man EMU 2.5" YJ to CJ Suspension Install
 
1 Attachment(s)
Hey gang,

I'll be tackling this install on my 1981 CJ7 258, today, and would appreciate any tips I can get. I got it from 4WD.com

It appears the rear end is pretty simple....space the brake line and bolt everything on.

The fronts are more involved, since I have to do some grinding to install new shackle hangers, but I've got a fair handle on that.

I'm most concerned about drivability issues, afterwards. I went with the 2.5" package because I wanted to avoid castor and driveshaft problems. I know shimming to create the correct angles isn't difficult, but it seems kinda band-aid-ish to me.

Anyway, I'd love to hear from any of you with experience with this kit.

Matt

ErikEastman 07-28-2011 07:12 AM

I didn't use the conversion kit, I parted it out myself. Install is straightforward like any other leaf suspension. Taking old stuff off is the difficult part. Soak everything with PB blaster a couple days before you start.

The only thing that isn't bolt-on would be the front shackle hangers, which involve removing the front cross member rivets and using the holes to relocate the new hangers forward of the stock locations.

Ride height is perfect imo, and it looks like you got 4 of the rear heavy springs. I have the medium front springs and the rear heavy, so on my CJ the rears sits slightly higher than the front(maybe 3/4")so with it loaded up it will sit level.

The difference in ride and handling is profound, I also did not want so much lift that my various steering and alignment angles etc would be negatively affected, and this setup does not. YMMV.

Good Luck, post pictures of your progress if you have time. This is a terrific upgrade.

Matt1981CJ7 07-28-2011 07:19 AM

Hey thanks, Erik!!

Yeah, Les at 4WD recommended the 4 heavy rears because I run a heavy winch, hard doors, and a hard top in the winter.

So you had plenty of castor, afterwards, without shimming? And no vibrations in the driveshaft?

Also, will the stock dropped Pitman arm work with this setup?

Thanks,

Matt

ErikEastman 07-28-2011 07:59 AM

I haven't had an alignment done to know exactly what I ended up with, but I have no vibrations or wandering etc. Rides perfectly. I think this lift is just toeing the line where it's mild enough to not cause any issues. Again your mileage may vary though, every rig is a little different.

I went from a 4" Rough Country which was horrible and had all kinds of handling issues, down to this, which has been perfect.

I went back to a stock pitman arm and it's fine. I actually have greater turning radius now.

Here's a pic of what I ended up with, just the right amount of lift imo:

http://img600.imageshack.us/img600/9056/dsc02483f.jpg

geochaf1 07-28-2011 08:25 AM

What are you going to do for shackles? I used the following when I installed the OME lift on my Jeep.

http://www.quadratec.com/products/16090_8009.htm


By the way, below is a good thread on an OME lift install.

http://www.jeepforum.com/forum/f8/ol...t-kit-1075038/


Cheers,
Chris

batmn77 07-28-2011 08:30 AM

http://img600.imageshack.us/img600/9056/dsc02483f.jpg[/QUOTE]


I love your jeep bro!

Matt1981CJ7 07-28-2011 08:35 AM

3 Attachment(s)
Erik,

Dang, that's a fine looking ride!! I hope mine has a similar stance, afterwards. Are those 33s?

Chris, you may have hit on my only snag. The salesman told me I could use the existing hangers once I replaced the old frame mounts with the wider ones. Was he mistaken?

Here are a few "before" pictures of the ol' girl. I'm going to tackle the body, when I complete the suspension.

Matt

geochaf1 07-28-2011 08:52 AM

My understanding is that you need YJ shackles due to the front springs now being 2.5" instead of 2" wide.

ErikEastman 07-28-2011 09:56 AM

No you can use CJ shackles. Might need new bolts though.

ErikEastman 07-28-2011 09:59 AM

Quote:

Originally Posted by batmn77 (Post 11929487)


I love your jeep bro!

Thanks, looks a little different now, I put family style bars on it and a safari top.

ErikEastman 07-28-2011 10:00 AM

Quote:

Originally Posted by Matt1881CJ7 (Post 11929512)
Erik,

Dang, that's a fine looking ride!! I hope mine has a similar stance, afterwards. Are those 33s?

Chris, you may have hit on my only snag. The salesman told me I could use the existing hangers once I replaced the old frame mounts with the wider ones. Was he mistaken?

Here are a few "before" pictures of the ol' girl. I'm going to tackle the body, when I complete the suspension.

Matt

Yes I have 33's. No rubbing, but I don't do much heavy wheeling.

batmn77 07-28-2011 03:41 PM

Quote:

Originally Posted by ErikEastman (Post 11929921)
Thanks, looks a little different now, I put family style bars on it and a safari top.

pics or i dont believe you! ;)

CJFF29 07-28-2011 04:02 PM

If you don't mind me askin what did the setup run you from 4wd? I will be trying to put together a lift with YJ springs soon and was wondering how much begging I will have to do to get the funds from the wife. I plan on using the hangers made by Jim.
http://www.crabtreetool.com/

Matt1981CJ7 07-28-2011 06:45 PM

3 Attachment(s)
CJFF29, expect on about $1500.

Well, I didn't get as far as I wanted to (no surprise :mad:):

The old rear springs and shocks came off easily. Unfortunately, one of the bolts holding a rear shackle mount snapped, causing a lengthy drill-punch-tap remedy.

The CJ rear shackles and bolts worked fine with the YJ springs. Of course, I couldn't re-use the shackles without giving them a little touch-up paint.

The rear springs are on.

Unfortunately, I'm dead in the water. My buddy, Les, at 4WD, assured me the shocks he was sending me were correct. Unless I'm missing something, it appears Les f**ked up.

Matt

mrgimble 07-28-2011 06:58 PM

Yes Les did.


The time now is 06:41 AM.

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