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Old 02-09-2011, 05:44 PM   #1
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Question Rolling over with a 2.5" Budget Boost / 35" Tires?

My friend has put the fear of death in me. I've told him I'm getting a 2.5" budget boost lift with 35" tires and he is convinced I will roll my jeep and kill myself. He says I wont want to go on the freeway.... and a gust of wind will make me tip. He is sincerely worried I will hurt myself.

He suggested I go with a more complete suspension... even if it costs more... but I haven't been able to find one for my 2007 2 Door JK that only raises 2.5" (I'm only going 2.5" to avoid the costly drivetrain modifications I've been hearing about once raised to 3")

I'm really not sure where to go from here... maybe get the 2.5" budget boost... and then add on additional components to increase the stability/safety?

What else can I add to whats already included in the budget boost:

Front and Rear Coil Spacers
Front and Rear Bump Stops
Front and Rear Shock Adapters
Rear Sway Bar Links
Rear Brake Line Brackets
Rear Track Bar Bracket
Front and Rear Shocks (no boots)

or should I look for a more complete system?

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Old 02-09-2011, 05:53 PM   #2
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Your friend is a dork . . . disregard his nonsensical argument and have fun with your new set up.

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Old 02-09-2011, 05:55 PM   #3
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Your friend is a dork . . . disregard his nonsensical argument and have fun with your new set up.
I would have called him something else, but they don't allow that on here.
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Old 02-09-2011, 05:56 PM   #4
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smack your friend in the head with a tack hammer.
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Old 02-09-2011, 05:56 PM   #5
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Well he was in a jeep rollover and his good friend died in the incident, so the concern is with good intentions.
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Old 02-09-2011, 06:02 PM   #6
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Explain to him that you will be also increasing the track width with the new wider tires which helps the stability.
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Old 02-09-2011, 06:02 PM   #7
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you will be fine with a spacer lift. but a good suspension lift is the teraflex 2.5 in lift. go to quadratec and check it out. im getting one for my 2010 2door rubicon
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Old 02-09-2011, 06:26 PM   #8
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So basically what I've gathered is I should be fine...

If I start to feel flighty, or am really worried about all of this I can add these components:

Front adjustable track bar
Front adjustable control arms
Steering stabilizer


Can anyone link me, or point me in the right direction, to those parts that would work with the TeraFlex 2.5" Budget Boost... or the Rough Country 2.5" Lift (I think they're pretty similar kits, but I haven't decided on which)
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Old 02-09-2011, 06:34 PM   #9
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Your jeep already has a steering stabilizer, and you can get both of the other items from Currie. Honestly you will be fine, I highly doubt that you would even flop your Jeep on the trail with that set-up. Its all about driving habits...
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Old 02-09-2011, 07:38 PM   #10
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A teraflex 2.5" coil lift will lift a 2 door JK 3", and you might have driveline issues at 3" of lift with a short wheelbase 2 door JK. I had vibration issues with my 2010 2 door JK that had this lift on it, adjustable control arms, and aftermarket driveshafts. My 2011 4 door JK has the exact same lift, but stock driveshafts, and is as smooth as silk, with never one vibrations. Go figure.

You may wish to consider a Teraflex "performance leveling kit", which is a coil spring lift that lifts the front by 2" and the rear by 1", for a net lift of 1 1/2"
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Old 02-09-2011, 07:48 PM   #11
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make sure you know the problems that may arise down the road b/f you go with 35's unless you plan on building a mall crawler....your front axle will need some beefing up in order to handle the tires in the long run if you wheel it
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Old 02-09-2011, 08:35 PM   #12
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A teraflex 2.5" coil lift will lift a 2 door JK 3", and you might have driveline issues at 3" of lift with a short wheelbase 2 door JK. I had vibration issues with my 2010 2 door JK that had this lift on it, adjustable control arms, and aftermarket driveshafts. My 2011 4 door JK has the exact same lift, but stock driveshafts, and is as smooth as silk, with never one vibrations. Go figure.

You may wish to consider a Teraflex "performance leveling kit", which is a coil spring lift that lifts the front by 2" and the rear by 1", for a net lift of 1 1/2"
OK You're the only one that has said this so is there anyway I can verify this?
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Old 02-09-2011, 09:10 PM   #13
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OK You're the only one that has said this so is there anyway I can verify this?
Fatal Angle Tom Woods JK Wrangler Driveshafts - Jp Magazine
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Old 02-09-2011, 10:02 PM   #14
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I owned a '59 CJ5 and it was very flippy. It never rolled; but it was on the edge often. I still have driving habits from that rig. My '10 JKU with a 3" lift is completely stable. I would have to do something dumb to roll it in normal driving. And as I live in tornado alley we deal with high winds too. No worries.
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Old 02-09-2011, 10:25 PM   #15
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If the lift is more for the looks then go with the 2 1/2" lift and then a 1" body lift. Not fan of body lifts but it will give you the look of a 3 1/2" lift without the drive train issues because body lift does not effect driveshaft angle. As far as rollover the JK's have a wider stance and with wider tires it really is no issue unless you are driving your Jeep on an unsafe grade to begin with.
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Old 02-10-2011, 12:21 AM   #16
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Its all about driving habits...
So true!!
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Old 02-10-2011, 01:14 PM   #17
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OK You're the only one that has said this so is there anyway I can verify this?
Yeah, I'll verify it for you, LOL. Seriously though, here is what happened. I had a Teraflex 2.5" long arm suspension lift installed on my 2010 JK. At the same time I had 5.38:1 gears installed, and 35" tires. When I got the Jeep back from the shop it had a driveline vibration at 70 to 80 mph.

Took it back to the shop to adjust driveline angles with the adjustable control arms -- made no difference. I had Tom Woods driveshafts on the Jeep, and we sent them back to Tom Wood to have them rebalanced -- made no difference. Had a local driveshaft shop check the shafts -- made no difference. Rebalanced 35" tires -- made no difference. Changed to a different set of 35" tires -- made no difference. Removed the front driveshaft and drove with just the rear driveshaft -- significantly better, but still vibrated. Removed the rear driveshaft and drove with just the front driveshaft -- better, but still vibrated. Had a new front driveshaft built -- made no difference. Removed both driveshafts and got towed down the freeway at 80 mph -- smooth as silk. Replaced both aftermarket driveshafts with the stock driveshafts again -- vibration gone.

This was a several month process, and the angles on the pinion / driveshaft had been adjusted literally hundreds of times trying to get the vibration to go away, and never got it to resolve. It did not appear to ba an angle problem. I think it may have been a yoke problem. The stock driveshaft yokes are "hub centric", and aftermarket yokes are not.

I can't say why the aftermarket shafts caused so much vibration. I do know that the stock R Zeppa style CV joints are better at preventing vibration than the CV joint style used on aftermarket shafts; that is why Jeep uses them. But, they do not tolerate extreme angles. AEV has also had problems with aftermarket driveshafts causing driveline vibrations, and they now retain the stock shafts with lifts up to 4".

You need to be aware that you might have vibration issues if you start modifying your Jeep. Most don't, but some do. My current Jeep doesn't have any problems, and it has the same Teraflex 2.5" springs as my last Jeep, but short control arms this time, so I could do the installation myself. I have done every single mod myself this time, and so far it has been perfect.

I recommend keeping suspension lift to just 2 1/2", and retaining the stock driveshafts. 2 1/2" of lift is enough for 35" tires with the stock flares, or 37" tires with flat fenders, and most people don't need more than a 37" tire.

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