it will depend on the year/ model of your TJ, the general consensus is though the part numbers are different the spring height is the same for a model year. BUT if you have a 1998 Sahara and install 2006 Rubicon springs or LJ springs there is a small height difference 1/2 - 1" maybe if any. I installed MOOG springs (3227rear/3226front these are MOOG # for a rubi/LJ) on a 1998 Sahara didn't even notice any great lift(my spring were shot and 1" lift I attribute to the older spring sag). if dad did not have these springs laying around we would have use OME heavy duty spring with their shocks. they would account for any after market equipment front or rear.

 

what did OME/Dirk say about lift?

 

LJ coils fit just fine on a TJ. What matters is the sprung weight of the vehicle against the length and rate of the coils to produce the desired ride height. If you know your weights, this can be calculated with a high degree of accuracy.

I ran 949s on my TJ for a couple years. They gave me right around 2" in the rear with my heavy carrier and 33" spare.

 

I've got the 2942 springs on my 2000 TJ. 4 cylinder on 33's with 33" spare, full doors/soft top, and aftermarket bumpers. I love the way it rides.

 

OME 942
160lbs/in
14.96" free

OME 940
190lbs/in
14.96" free

OME 949
216lbs/in
14.57" free

OME 943
230lbs/in
14.57" free

Pick the longest and lightest spring that will give the ride height you want.

 

Thanks for the help everyone. I did not get a chance to talk to Dirk but I am leaning towards the 2949s given that my TJ had a hard top full doors and aftermarket bumper with a tire carrier with a 33 on it


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