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v8 ZJ coils on TJ

18K views 24 replies 12 participants last post by  ggrote1 
#1 ·
been thinking about searching some of the yards up here for a set of V8 ZJ coils. What years and things should I look for? I know it depends on mileage etc.. on how much lift they give but on average what should I expect from a decent pair 3" or so? Any year v8 or what's my best bet? Thanks!

I'm thinking ZJ coils up front and my front TJ coils in back, Ive read that works, any suggestions?
 
#2 ·
I don't think it will give much lift in the front maybe 1" or so.. I can go measure mine compressed if you want to give you a better idea. also how do you plan to hold the tj front springs in place in the rear as they are a different size?
 
#3 ·
go look in the tj lift review section. one or two people there did it.
looks like it might be closer to 2-3 inches based on what i read there. apparently you can balance it out with the rear coils from a ex police crown vic.

as far as which zj, i think i read some where that its 93-98 years.
 
#6 ·
I have read many instances where people have done this swap and there isn't really anything that says it road like crap. The springs are the same size just different rates, it will be much stiffer I realize that but I think with a good pair of shocks it will ride just fine.
 
#9 ·
I have ZJ lift springs. And I know all to well about spring rates. :p

Of course the ride will differ and that is the just of what I was stating. I know several ppl who run the ZJ springs. Nothing wrong with it at all. The jeeps that rode like crap were 4cyl TJ's with V8 zj springs with no added weight. Very stiff ride. Also most people who do a ZJ spring swap do it because they are on a little or no budget. Just like alot of us. But most all reviews are bias, If all someone knows is stock or modded with ZJ spring how can they truly give a accurate review of it compared to other lifts?

Junkyard springs are going to be broken in whether you get them from the 6cyl or 8cyl will be determine the spring rate...also there was the factory upcountry ZJ spring with an even stiffer coil rate and net almost 1'' more lift.

I don't know what is on your jeep I was simple letting you know a few facts. To help you out. Not steer you away from doing the swap.

Anything else bud let us know. :wavey:
 
#7 ·
ADK I mean what is the worst that can happen you get the springs for 25 bucks at the junkyard you toss them in in about 25 mins, then you don't like them you take them back out. It is not hard just swapping springs go for it and see.
 
#10 ·
Thanks distorted I appreciate the advice especially since you know first hand. I think I'm going to give it a try (i have nothing better to do :) ) worst case scenario I hate it and I'm out $20 and an hour of my time.

What springs are you running in the back distorted?
 
#13 ·
Yep you can always take them back out. Shock will help out some and on a small budget I recommend Skyjacker Hydro shocks...can get them in almost any size for $36 each through jegs or summitracing quickly. DO NOT get the Nitro shocks. And with the ZJ springs in your 4 banger...you will need to change the shocks to accomidate the new lift height. Shoot for 3'' lift shocks. Most shock you can get for 2.5 to 5'' of lift and will work fine.

All my info should be in my jeep profile but I run OME LJ lift springs in the rear.
Both my OME ZJ and LJ springs lift springs and not stock coil rates. Both Netting me 3.5 inches of lift from stock. I chose these specific springs for my appication due to there spring rate and factored in weight of my modifications and future/sitting in the garage mods that will be added to my jeep. Such as tub fenders and full corner armour etc. If you'd like the part numbers for the springs let me know.

:wavey:
 
#11 ·
I have a pair of ome springs front for a zj. I think there 1 or 2 in lift so it should make about 3-4 in lift on a tj. I got them to do the same but I think im am going with a whole new ome lift kit thats complete. shoot me a line if you want them for what i paid on ebay for them. they still have tags on them even though they were on for a short time.
 
#14 ·
zj springs

actually hop on napa and you will see that free height there is a difference a 2inch difference between the springs and 3 more coils. there is a 4 inch difference in load height as well. so yes they will be stiffer but not that much stiffer. my last tj had cv police interceptor variable rate springs in the rear, 25$ at the junkyard, and v8 zj coils up front with stacked isolators. i had 4.5 inches up front and 3.75 in the rear. keep in mind that was on a 4 cylinder
 
#18 ·
TJ LJ lift with Moog Springs. ZJ and more

Maybe bring this old thread back to life. I just purchased a 2004 LJ and was looking into options for the lift. I like to go cheap and tinker with it so I decided on Moog CC784 springs for the front and CC801 for the rear. Purchased at Advance auto with internet discount coupons and got all four for $133 including shipping. I'll post how it works out in case anyone wants to try it. I've heard different things about the CC784 ZJ springs but never seen anyone use the CC801 that was used on the Ford Torino. I'll know if it fits over the weekend.
 

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#19 ·
Moog Springs Done on the LJ

Finished the lift today with the MOOG CC784 in the front and CC801 in the rear. Worked out good but I do wish I had gained more. Both front and rear came up 2.5 inches. Rides good. I put some red JK shocks on and I think they may be a little worn so I'm not real impressed with the shocks. I also added bump stops and longer sway bar links. All in all for the value I would rate it very good.
 

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#20 ·
Finished the lift today with the MOOG CC784 in the front and CC801 in the rear. Worked out good but I do wish I had gained more. Both front and rear came up 2.5 inches. Rides good. I put some red JK shocks on and I think they may be a little worn so I'm not real impressed with the shocks. I also added bump stops and longer sway bar links. All in all for the value I would rate it very good.
Looks good.:thumb:
 
#21 ·
Nice. I used the zj coils in the front. I was going to put spacers in the rear, because I had them, but ended up getting bds +2" rear coils. For shocks I got the rancho 5000x, which I really like the feel of.
 
#23 ·
My front shocks, CC784 settled in over a day of driving and lost 1/2 inch so I only gained 2 in the front. I'm going to add a spacer to level it out. All in all still good. Just didn't get the lift in the front I needed to keep up wit the rear.
 
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