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Old 10-15-2010, 02:48 AM   #1
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4" suspension lift, tires, and ride quality

Have a new JK. Love the ride, very smooth.
Thinking of a 4" suspension lift - anyone have experience with just a 4" mopar lift? How does the ride change? If the ride is to bad should I look at a 2.5" lift instead (doesn't seem like much).

Also my tires are 32x10 goodyear wranglers - I was thinking of just keeping them for now (why throw out 5 tires that have 1,000 miles on them). Is this ok (everyone is trying to sell me tires+wheels along with the lift)?

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Old 10-15-2010, 06:24 AM   #2
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Your Jeep is goiing to look silly with a 4" lift and 32" tires. You can easily sell them for $400 to $500. Many things will change with a 4" lift especially your CG. Ride quality will depend upon components used. You will also need to replacement your driveshaft with a 4" lift. Maybe not right away, but eventually the boot will rub and tear.

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Old 10-15-2010, 06:39 AM   #3
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The 4" Mopar lift is also a long-arm kit. That's a fairly hardcore option, requiring cutting and welding. NOT for a casual driver, but more for a hardcore off-roader. Do a search, learn up on what lift kits are for and what they do, and then see what makes more sense for you- Mark W.
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Old 10-15-2010, 07:41 AM   #4
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Sonny, these are the kind of things I mentioned that you need to look at. Do lots of research on here and bounce ideas off these guys. They know what they are talking 'bout!

It's easy to get excited about this stuff since you went wheeling last week and got a fix! (I am guilty myself) Don't jump too fast until you are positive about something this major and have all your questions answered. Once you get it narrowed down, I'd be glad to hook you up with my jeep mechanic to help with your final decision. But kudos on getting the bug!!!
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Old 10-15-2010, 07:44 AM   #5
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Yeah, but you're a girl. It sounds much better when a guy says the same thing!
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Old 10-15-2010, 08:00 AM   #6
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Yeah, but you're a girl. It sounds much better when a guy says the same thing!
That was not nice. I was trying to brag that you were one to bounce it off of!

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Old 10-15-2010, 08:03 AM   #7
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1. It sounds as if you have very little offroading experience.
2. You have a large investment in your Jeep.
3. You already have a Jeep that has far and away more offroad ability than you have skills to handle.
Why would you want to risk that investment to look cool?(Your in a Jeep you already look cool) Spend the money on underbody armor, tow hooks, tow strap, winch, and maybe a very small suspension lift (just to enable armor). Add tires and other mods as your skills call for them. In the process you can learn more about your Jeep and come to enjoy doing the mods yourself. At this point you have already spent the money to have a better time than 97% of the people who own vehicles.
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Old 10-15-2010, 08:26 AM   #8
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You don't need a lift to "enable" armor. My advice is if you are going to get a lift, do it right from the start. If you want 4" get it and everything that you need. Suspension is not something to "cheap" out on. Your life and the life of others could depend on it. If you can't afford tires right away, so be it. Once you get the lift I can pretty much guarantee you'll find a way to get the tires you want.

For what it's worth, 4" is pretty extreme for a JK. Unlike TJ's, you can fit 35's with only a 2.5" lift.
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Old 10-15-2010, 08:37 AM   #9
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As far as enable try a tummy tuck without one. As for the lift that's why we all have opinions. But, raising the CofG with with no idea what the Jeep can do won't endanger anything? I'm glad that's cleared up for me.
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Old 10-15-2010, 08:41 AM   #10
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You can fit 35's under a tj with 2.5 inches of lift.....just have to get a lot of extra parts and do some extra work I think theres a guy on here that has 35's on his jk with a 1.5 inch leveling kit and trimmed flares though.
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Old 10-15-2010, 08:43 AM   #11
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You can fit 35's under a tj with 2.5 inches of lift.....just have to get a lot of extra parts and do some extra work I think theres a guy on here that has 35's on his jk with a 1.5 inch leveling kit and trimmed flares though.
I know what my TJ looked like with 35" tires on a 4" lift...I bet there is no turning radius on that one...flares or not.
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Old 10-15-2010, 08:46 AM   #12
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Rokmen.com they got a LJ with 2.5 lift and 40's under it. Hiline fenders and cutting open the rear wheel wells with some crazy backspacing goes a long way. Rokmen specializes in high ground clearance with low center of gravity. If I get the LJ that I want after basic thats the route ill be taking.
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Old 10-15-2010, 08:49 AM   #13
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For what it's worth, 4" is pretty extreme for a JK. Unlike TJ's, you can fit 35's with only a 2.5" lift.
Agree, if it's a daily driver, 2.5 wiill handle 35s with the right wheels, and out perform a TJ with a 4 inch lift. If you install quick disconnects in the front, you will get some rubbing when fully flexed, but flat fenders will enable you to handle all the flex with the 35s and no cuting. I went with the 2.5, and skidded everything out. I have to tip tow over the big rocks (7s), but my belly is protected if I fall off one, and it still has good manners on the road. Once you start down this path... lift, tires, wheels, gearing, lockers, skids/sliders, flashpac... Just Empty Every Pocket 6 grand common cost to get it done.

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Old 10-15-2010, 09:21 AM   #14
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Quote:
Originally Posted by s1234 View Post
Have a new JK. Love the ride, very smooth.
Thinking of a 4" suspension lift - anyone have experience with just a 4" mopar lift? How does the ride change? If the ride is to bad should I look at a 2.5" lift instead (doesn't seem like much).

Also my tires are 32x10 goodyear wranglers - I was thinking of just keeping them for now (why throw out 5 tires that have 1,000 miles on them). Is this ok (everyone is trying to sell me tires+wheels along with the lift)?
I have a 4" lift on mine with 35" tires. It rides good on a smooth road but like crap on a rough road. If you're worried about ride quality, skip the 4" lift. Also, the 325/65x18 BFG tires I have are 10 ply. Very stiff sidewall
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Old 10-15-2010, 11:19 AM   #15
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I have the Rancho lift 4" and it rides so much better than stock or the 2"BDS lift I used to have.
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Old 10-15-2010, 12:19 PM   #16
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I have a 4" lift on mine with 35" tires. It rides good on a smooth road but like crap on a rough road. If you're worried about ride quality, skip the 4" lift. Also, the 325/65x18 BFG tires I have are 10 ply. Very stiff sidewall
Have you tried letting some air out?
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Old 10-15-2010, 05:15 PM   #17
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Have you tried letting some air out?
I'm running 35 psi. They recommend 45 psi, but thats impossible. The good thing about the tires, is that they don't have any vibration at all. Even at high speeds.
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Old 10-15-2010, 05:34 PM   #18
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I'm running 35 psi. They recommend 45 psi, but thats impossible. The good thing about the tires, is that they don't have any vibration at all. Even at high speeds.
Don't go by what the tire says on the inside of your drivers door there should be a sticker that tells you the exact amount of pressure there should be in the front tires and the exact amount of pressure in the rear tires. Go by that.
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Old 10-15-2010, 05:48 PM   #19
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Don't go by what the tire says on the inside of your drivers door there should be a sticker that tells you the exact amount of pressure there should be in the front tires and the exact amount of pressure in the rear tires. Go by that.
Only if you're running stock sized tires..... The person I replied to is running larger than stock tires, therefore the psi on the door is NOT appropriate for his application.



Jetmech, that's probably still too high. Do a chalk test on them and see what the contact patch looks like. If you're only making contact on the center treads let out some more air, till you are around an inch from the outer treads. Your ride quality should improve. And of course if you are offroad, air them down a lot.....

I assume the 45psi is on the sidewall? If so, then yjkid is correct in that, that is the MAX psi.... always too high for any tire on anything.... Jeeps are much lighter than the typical vehicle 35" tires are used on, so the recommended psi for a big quad cab Sierra is gonna be a lot different than a Wrangler...
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Old 10-15-2010, 07:06 PM   #20
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Only if you're running stock sized tires..... The person I replied to is running larger than stock tires, therefore the psi on the door is NOT appropriate for his application.



Jetmech, that's probably still too high. Do a chalk test on them and see what the contact patch looks like. If you're only making contact on the center treads let out some more air, till you are around an inch from the outer treads. Your ride quality should improve. And of course if you are offroad, air them down a lot.....

I assume the 45psi is on the sidewall? If so, then yjkid is correct in that, that is the MAX psi.... always too high for any tire on anything.... Jeeps are much lighter than the typical vehicle 35" tires are used on, so the recommended psi for a big quad cab Sierra is gonna be a lot different than a Wrangler...
It's a 10 ply tire. The sidewall actually says 60 psi. Tire Barn recommended 45psi. I recommended 35 psi Might drop it down to 30 psi
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Old 10-15-2010, 09:32 PM   #21
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Thanks to all, great for a newbie like me.

Jerry Bransford, Daggo66 and everybody - all I want is to do moderate trails without whacking my skids everywhere (there is a local place here called Uwharrie, I took my stock and kept hitting the skids).

Would a 2.5" skyjacker lift do the trick (dealer installs this for around $1,100)?

Should I still change my stock good wrangler 32" tires to 33" or 35" tires, or should I keep them (I'd only get 0.5" more clearance with 33's right)? Would I need to regear if I change tires?

Thanks again for all the help.
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Old 10-16-2010, 11:12 AM   #22
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You can do the lift without the tires, but it will look a little funny. I did a 2.5" lift, 1.25" body lift on my TJ and waited a month or 2 before i bought 33s. I'm sure you can find a better shop than the dealer that will also be cheaper. Many times its best to buy wheels at the same time you buy tires so that you can get less backspacing.

I'm going to run 35s on my LJ with 2.5" SL, 1" BL and cut up fenders. My rear fender lift gave me 2.75" min extra clearance all the way around. So i could go from 31s to "36.5s" without any additional rubbing.
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Old 10-16-2010, 11:45 AM   #23
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Thanks everybody!

Consensus seems to be (mainly for a daily driver, who wants to do some serious offroading):
Lift - stay <= 3".
Tires - move up to 35" ATV's from my stock 32's highways.

Only other questions I have:
Will my front axle dana 30 be fine with 35" tires?
Any tire brand or wheel brand/size recommendations?
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Old 10-16-2010, 12:54 PM   #24
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Yes the front 30 will be fine.
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Old 10-16-2010, 01:13 PM   #25
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Originally Posted by s1234 View Post
Thanks to all, great for a newbie like me.

Jerry Bransford, Daggo66 and everybody - all I want is to do moderate trails without whacking my skids everywhere (there is a local place here called Uwharrie, I took my stock and kept hitting the skids).

Would a 2.5" skyjacker lift do the trick (dealer installs this for around $1,100)?

Should I still change my stock good wrangler 32" tires to 33" or 35" tires, or should I keep them (I'd only get 0.5" more clearance with 33's right)? Would I need to regear if I change tires?

Thanks again for all the help.
Sonny...don't book with the dealer until you talk to my mechanic. Might change depending on what exactly you need, but he had told me he would install a 4" lift on a TJ for another WF guy for $300. (you providing the kit separately, of course)

The difference would definitely offset the cost of your tire upgrade, which he could do too.
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Old 10-16-2010, 01:24 PM   #26
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Adding a lift isn't going to give you any more ground clearance. You're going to need larger tires if that is your goal. The purpose of the lift is to allow for larger tires, thereby raising the vehicle higher from the ground.

Scraping your skids is what they are there for. What you don't want to do is whack your differentials. Driving skill plays a big part in this as well. You need to put your tires on the obstacles and be aware of your angles on them as you go from one to the next.
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Old 10-17-2010, 12:12 AM   #27
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Thanks everyone.
A few other questions - do I need to regear my JK if I go to 35" atv tires (stock tires are goodyear wrangler 32"x10)? When regearing is it only the rear axle, or does the front axle get regeared also.
Daggo66 - initially my main reason for lifting was to get a better breakover angle (when I did some offroading my diffs were not hitting, but my skids were, on the big bumps). I'm mostly a highway driver, but I want the capability to do some moderate/serious offroading.
Shell - thanks a bunch!
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Old 10-17-2010, 01:50 PM   #28
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To keep my new JK powertrain warrany intact it says "that only mopar parts installed by an authorized jeep dealer" qualify. If I get an old man emu or some other high quality lift installed by a great jeep mechanic I'm out of luck right?

Also old man emu only shows a 2" lift for the JK, so who would you recommend if I decide to go for 4"?

After all my research it seems the safe thing to do (less driveline and other problems and good ride quality) is:
2-3.5" lift
33" atv tires

What I really want (I think):
4" lift
35" atv tires
the problem with this being drive line modifications, regearing, spare tire holder problems, ride quality problems (a little gun shy for these reasons).

Any more opinions and sage suggestions appreciated.
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Old 10-17-2010, 01:58 PM   #29
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How hardcore do you plan on getting exactly? I am betting the first setup will be all you need. But, you can decide a little more after you ride in mine. Won't be a true judge, but will help somewhat I bet.

I would probably get the dealer to install if you are concerned about warranty issues. See what the rest of the gang here thinks.
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Old 10-17-2010, 02:12 PM   #30
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Just looking to do the Uwharrie trails Shell (easy, moderate, maybe a bit of the harder ones). Several people have told me the warranty issue may not be an issue (depends on the specific dealership for non-mopar parts).

Let me know about timing for the meeting with your mechanic :-)

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