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Unread 01-16-2006, 05:31 PM   #1
Rockiholic
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ZJ-TJ Coil Over Conversions

I heard about swapping the front coils from a V8 ZJ into the front of a 2.5 TJ, and then replacing the rear coils with the TJ's front for a cheap lift. Anybody know specifics about this or anything like it?

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Unread 01-16-2006, 08:43 PM   #2
jdelow77
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you cant put some zj v8 coils in the front and some late model ford crown victoria rear springs you will have to bend the pigtails on the bottom to get them in but it will work, i did this the first time i lifted my jeep but it will ride bad but it will clear 33s the front will sag a little if you have a v-6 if you have a 4 it might be level, hope that helps you
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Unread 01-16-2006, 10:23 PM   #3
gumcrew2
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I know that you can put ZJ V8 coils in an XJ and it will give about an inch of lift and ride stiffer. Also, TJ and XJ coils are interchangable, only difference is the spring rate thus meaning a different height. TJ coils are usually 140lb/in, XJ's are about 165lb/in and ZJ V8's are like 190 lb/in. So it can be done but it will ride like crap. ZJ coils give an XJ about 1" of lift, so it'd probably give a TJ 2-2.5" and ride STIIIFFF. If you really need the lift go for it. Don't know anything about the rear though.
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Unread 01-17-2006, 11:58 AM   #4
Rockiholic
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I dont doubt that the ride would be stiffer than my current setup, but how much ride quality do you think I would be sacrificing? My current shocks are doneski so I was looking for a cheap lift as long as I am replacing suspensions parts. Also, my TJ is a little heavier than a stock setup (bumpers, stingers, rockers, winch, etc.), how do you think this would offset the higher spring rate?
P.S.-I think this might be do-able, but then again I'm not very smart...let me know
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Unread 01-17-2006, 12:00 PM   #5
Rockiholic
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For the back, I heard about swapping the TJ front coils (stock) with the rear ones to level out
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Unread 01-27-2006, 02:30 AM   #6
FreemasonJeeper
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I would actually prefer the stiffer ride. I sometimes miss the leaves that were in my YJ. I don't like how my TJ nosedives when I hit the brakes. I'll take stiffer springs any day.
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Unread 11-19-2006, 10:23 PM   #7
FifteenCents
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Cheap 3 inches of lift

To put the stock front springs in the back you will need a spring compressor, (very dangerous) and they will sag because they will be over compressed.

I bought rear springs from a 2000 ford crown vicotria from a local salvage yard for real cheap less than 40 bucks I think. I did a write up on my local site check it out
http://www.the4x4network.com/forum/viewtopic.php?t=1084
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Unread 11-19-2006, 10:25 PM   #8
FifteenCents
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The ride is not "STIFF" though the front springs are a little firm, but that helps on braking. I like the feel of them
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Unread 12-24-2006, 04:52 PM   #9
cj847
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I have ZJ coils in front and 2" BB blocks in rear. Looks good and rides good (the front is a little stiffer than stock which i like). I also used the ZJ shocks as they are an inch or so longer and they were free in my case.
I would not move the front springs to the rear, they are just too different.
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Unread 03-19-2007, 08:03 PM   #10
smartshot
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Quote:
Originally Posted by jdelow77
you cant put some zj v8 coils in the front and some late model ford crown victoria rear springs you will have to bend the pigtails on the bottom to get them in but it will work, i did this the first time i lifted my jeep but it will ride bad but it will clear 33s the front will sag a little if you have a v-6 if you have a 4 it might be level, hope that helps you

I-6 please

and there are many write-up's on this converstion
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Unread 01-15-2009, 06:54 AM   #11
claregina
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Quote:
Originally Posted by cj847 View Post
I have ZJ coils in front and 2" BB blocks in rear. Looks good and rides good (the front is a little stiffer than stock which i like). I also used the ZJ shocks as they are an inch or so longer and they were free in my case.
I would not move the front springs to the rear, they are just too different.
Do you have any pics of this?
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Unread 03-24-2009, 12:59 AM   #12
BucketOKarma
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Quote:
Originally Posted by smartshot View Post
I-6 please

and there are many write-up's on this converstion
....and yet so few of them have the part numbers listed.
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Unread 03-24-2009, 08:34 AM   #13
FifteenCents
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Quote:
Originally Posted by BucketOKarma View Post
....and yet so few of them have the part numbers listed.
The reason for that is most of them are done with used parts from salvage yards.
Buying stuff from the dealer makes it expensive and negates the reason
for doing it this way. If you wanna spend money jsut buy a kit.
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Unread 03-24-2009, 10:55 AM   #14
BucketOKarma
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I never go to a dealership, but Austism-Zone, Advanced Auto, NAPA, and other automotive stores, are all good places to buy cheap replacement parts without the worry of getting something already worn out. My entire lift cost me $220, including shocks. and I bought the rear springs new. My front springs cost me a whopping $5 from someone that was throwing their XJ springs away after they installed their lift. The spring spacers in the front are the only things left from my 2"BB. The crown vic springs part number are either Moog CC865, or Moog CC817. Both will work I'm using the CC865 springs and now that they settled, they are giving me 4" lift in the rear.

Here is a pic of my jeep as it sits now:
Front: 2" coil spacer, XJ front springs, Edelbrock 3" lift shocks
Rear: Crown-Victoria rear springs, Edelbrock 3" lift shocks.
32x11.5" BFG A/Ts


And this is what it looked like before any lift:
Front: Stock springs, Stock shocks
Rear: Stock springs, Stock shocks
31x10.5 BFG A/T
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2000 2.5L 5spd 4.88, HP D30 w/OX, D35 open, 3" "FrAnKeNLiFt" with some stuff... LOOKING FOR Willys Edition TJ rear seat! to match the fronts.

www.MilitaryJeepers.com
http://groups.jeepforum.com/CT_Jeeps
www.SiSOffroad.com
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Unread 09-24-2009, 08:43 PM   #15
LMoscar45
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I got crazy gains with the ZJ coils I got from auto zone. I paid $92 for Moog premium lifetime coils, and it lifted the front 3.5 inches....my factory front rubi coils are out back and are within 1/4 inch of the ZJ fronts...not bad but more lift than I really wanted--I did not expect that much.
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