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Discussion Starter #1
Hi just broke down and bought the wrangler conversion kit from trail tough looks like a pretty awsome kit. Now I am in the market for my springs. I want to run 33in tires on 15 in rim in the spring over setup. dont want to cut the fenders either. what brand and size lifted spring have you found to be the best, looking for smooth ride, no rubbing thinking of going with 10.50 or 12.50 tire? Also trying to keep cost low. Also noticing do i need yj front springs on front of sammy and yj rear on rear off sammy or does it matter?
Thanks anything will help\\
Colton
 

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first thing I would do is search on some forums that are more geared towards this type of mod such as zuwharrie and zukikrawlers.
this forum is great for really simple questions and such but once you get into the bigger mods this forum isn't going to offer alot of answers.

Front and rear YJ springs are the same size just different number of leaf springs in the pack. Fronts a 4 pack and the rears are 5 pack. Depending on the weight of the vehicle you have you may want to run 5 pack on all four corners or even make your own combo of spring leafs to get you the height and ride that you are looking for.

lifted springs usually will not offer a "smooth" ride but I guess it is all in what you compare it too. I used stock springs to get a lifted spring and still have a "smooth" ride.

I am running heavy zuki with engine swap, heavy bumpers, winch, ect... so I was going with the 5 pack springs on all four corners but it didn't give me enough lift so I called Brent at Trail Tough and he suggested that I make my own 6-pack springs and those gave me another 1"+ of lift but still almost as soft as the regular 5 pack springs.

I found my YJ springs on craigslist for $60 a vehicle set. I ended up buying 8 springs or two car sets for $120 and then I had extras to make my own combo of leafs to get the ride and height that I wanted.

attached is a pic of mine on 31 -12.50 x 15 tires. I plan on swapping to 33 once these wear out and I have plenty of room for them. Also be sure to add some good frame mounted bumpstops, don't rely on the shock mounted ones. Some pictures are floating around of holes ripped in the frame because of the shock mounted bumpstops...
 

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YJ springs come in 3 flavors.
4 leaf - usually on front axle of factory soft tops
5 leaf - usually on rear axle of factory hard tops and front axle of factory soft tops
6 leaf - usually on rear axle of factory hard tops

I would also suggest 6 leaf packs for your 33's with bumpers and a winch.
I am running that setup with 6 leaf lifted springs (2") because of the spares I carry on the trail and it is smooth as glass in the rough stuff as long as you are aired down properly.
And if you don't want to run offset wheels or spacers stick with the 10.5" wide tires.
The problem with the shock bumpstops only happens when there is too little spring and too little up travel and shocks that are not valved correctly for the weight of the vehicle... - personal experiance, BTDT.

Oh... there are folks here with a bit of experiance that do more than the 'simple' answers...
 

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Discussion Starter #5
Talked to trail tough I was wanting to run 2 in lifted springs but they told me i would have driveline issues and to go 5 leaf all four corners and should have plenty of room for 33's however i believe i talked to you before about the kit and if i remember didnt you say that you had rubbing issues and had to do a body lift of something with stock arched leaf springs?
 

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I use taller than stock front spacers at the front of the hood to raise the hood a little for the 1.6ltr but I don't use any kind of full body lift. I went to lifted springs when I had too much articulation and had some rubbing at the fenders. That is with 33x12.50's

Anything taller than a 3" lift will have driveline issues. I don't recommend stock drivelines on any trail vehicle that might see a rock or drive under the influence of a heavy foot... ;)
 

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Discussion Starter #7
so with the trail tough wrangler conversion kit the $1300 one and 2in lifted leafs all the way around i will not have any issues? no rubbing of tire on anything and enough driveline spacing with the two spacers provided as well as the extended yoke? Also will the shocks they supplied with the kit have enough travel
 

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so with the trail tough wrangler conversion kit the $1300 one and 2in lifted leafs all the way around i will not have any issues? no rubbing of tire on anything and enough driveline spacing with the two spacers provided as well as the extended yoke? Also will the shocks they supplied with the kit have enough travel
Call Trail Tough... they designed the kit and know exactly how it works as far as what spacers are needed, ect... The kit was designed for stock YJ springs NOT lifted springs, so it may need some other parts to make it complete. I would call and ask.
They are always super friendly and always eager to answer your questions. They have never been pushy to sell parts and always nice on the phone.

With 60+ views and only two people responding, I will stand with my original statement about the majority people on this forum not being able to answer anything other than simple questions.... Billjohn and ACK are the exception to this rule ;)
 

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considering there's 8 posts in this topic and people check up on it every time it updates... I know I do. That means you have 8 people watching this topic, 4 of them have posted in this topic. That doesn't account for people who hit this topic from a search engine that links when they search for Samurai YJ spring conversion...

There's really not a whole lot more to add that you and Bill havn't covered already. Going to those other sites you're a lot more apt to get 4 or 5 conflicting responses from people who havn't done the lift but have an opinion on it, or people who set it up wrong, or someone who's running a completely hybrid suspension and trying to compare his Yota's with 38" mudders to someone with a stocker on 33's.

On here no one assumes you should know anything, and there are quite a few knowledgeable members who will give you the information you need without a load of crap to make you feel stupid. If they can't answer the questions they can point you to where you can get answers, but I havn't seen many questions on here that couldn't be answered by our members.
 

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Discussion Starter #10
thanks yall have been a lot of help, I found a set of springs they are 4 leaf fronts and 5 leaf rear started installing the kit this weekend.

only problems I see with the kit so far are the shock towers, They seem a little too tall and the bottom angled part of the tower needs a little more bend to it, what can I expect though its ford parts lol.

When Its done will post some pictures in this listing and let yall know how it turned out

Thanks,
Colton
 

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the way I have my shock towers posistioned had them a little bit too tall as well. I just put them as high into the fenderwell that I could and then trimmed off the bottom edge that was hanging down past the frame.

I didn't have any issues with the bends so not sure what to tell you there.

Good luck and be sure to post up some pics.
 

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Discussion Starter #12
You mentioned bump stops now with the kit i had to cut off the factory bumpstops where and what did you use to place them on your samurai. Pics would be nice if availible? Ive got the front all bolted up and went fairly easy, did what you said on the the shock towers they fit nice now. Thanks, Iam moving to the rear tomorrow anything i need to watch out for?
 

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You mentioned bump stops now with the kit i had to cut off the factory bumpstops where and what did you use to place them on your samurai. Pics would be nice if availible? Ive got the front all bolted up and went fairly easy, did what you said on the the shock towers they fit nice now. Thanks, Iam moving to the rear tomorrow anything i need to watch out for?
I positioned my shock towers right behind the front bump stops. So I still have the factory bumpstop but it doesn't line up since the YJ springs move the axle forward. I had weld on a piece to move the rubber bumpstop forward to meet the spring u-bolt plate. I can add pics if you need but my setup will be a little bit different than yours.
I have seen where people just take a piece of square tube and run it perpendicaular to the frame right above the u-bolt spring plate and then add the bumpstop to that.

The rear was pretty easy to figure out. I did have to cut off my exhaust tip because it routed out the driver's side and was in the way. Now I have it routed straight out the back with a turn-down at the tip. The rear factory frame mounted bumpstop still lines up with the axle u-bolt spring plate.

Good luck and be sure to post up some pics
 

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Yeah Pics would be great if possible
thanks
These pics are from when I had 2" lift Bonz-Eye springs. They way they are setup now with the YJ springs are exactly the same except the steel square tube that is welded to the top of the u-bolt plate is a different size. The size tube you need will vary depending on your setup (tires, body lift, ect...).
 

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Discussion Starter #16 (Edited)
Rough Ride out of the tt yj kit

After a month or so of driving and putting some rubber underneath my 89 samurai ive come to be somewhat disapointed in the ride quality both on and off road. I noticed somewhat of a difference with the bigger tires but hitting just small bumps are incredibly harsh. Its almost as if the suspension is bottoming out but that is not the case. I recently drove a buddies sammy with the exact same setup and there is a very noticible ride quality difference, his also sets up a little taller then mine as well which is making me believe that my springs are possibly shot. Could sagged springs cause my rough ride? I have tons of articulation but with all four wheels on the ground there is very little movement in up travel on the shocks. let me know what you guys think


heres a youtube video with the kit installed at a local park with a couple of buddies
 

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After a month or so of driving and putting some rubber underneath my 89 samurai ive come to be somewhat disapointed in the ride quality both on and off road. I noticed somewhat of a difference with the bigger tires but hitting just small bumps are incredibly harsh.
How much air are you runing in the tires?
If it is more that 20 psi then you have your answer. Check the on the side of the dashboard and it will say that you should be running at 20 psi (because of the weight, or lack of it - for that chassis).
Depending on the tire, you may still be high at 20...
When I ran 32/10.50/15 Swamper SX's I had to stay at 14 for the road to have a perfect tread footprint. Anything higher would only wear the center of the tread. It would also feel like I was running old wooden wheel stagecoach wheels...
 

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exactly what BillJohn said....
play with the tire pressure, it will make a HUGE difference. If you don't have onboard air you can pick up a small 12v pump that should work fine.

I am running 16psi on the road and 8-10psi off road on my 31x12.50-15 ProComp Xterrains tires. AND I am running heavy with my tintop weighing in at 3180lbs......
 

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looking at the video, both the white and green samurais have plenty of suspension travel over the slow course and neither seem to be sagging noticeably. If you are noticing harsh response on smaller bumps at speed, it may be that your shocks are too stiff. What shocks are you running, and is yours the white rig or the green one?
 

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Just went through the video (couldn't stream it at work).

Look closely at the tires... Almost no deflection whatsoever. I would bet that they were all at street pressure (or more for the Zooks). Dropping the tire pressure for the trail should be second nature. Not only does it give a smoother ride, but it allows the tires to grip (more like envelope) the rocks to gain more traction and spin less.

Driving those on the street at full pressure would feel like driving a paint shaker.
 
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