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Old 07-08-2014, 09:05 AM   #1
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Vibration after Budget Boost

Hey Guys.
So I installed a TF 2.5 Budget Boost on my 14 JKU Sahara.
After the install I feel a vibration through the floor around 45-55mph.
In the back I got the full 2" of lift and for the front I installed 1.5" puck instead of the supplied 2.5" puck as I wanted to keep the rake.
I installed the rear track bar bracket and had all control arms etc loose then torqued to spec when on the ground.
It does ride a little more stiff but not too bad.
Any help would be appreciated.

Cheers
Paul

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Old 07-08-2014, 10:11 AM   #2
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Maybe try getting it aligned. That could be the reason.

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Old 07-08-2014, 10:57 AM   #3
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I didn't get an alignment because the steering wheel didn't need any adjustment and it doesn't pull or wander when on the road.
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Old 07-08-2014, 02:55 PM   #4
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Quote:
Originally Posted by paulyp View Post
Hey Guys.
So I installed a TF 2.5 Budget Boost on my 14 JKU Sahara.
After the install I feel a vibration through the floor around 45-55mph.
In the back I got the full 2" of lift and for the front I installed 1.5" puck instead of the supplied 2.5" puck as I wanted to keep the rake.
I installed the rear track bar bracket and had all control arms etc loose then torqued to spec when on the ground.
It does ride a little more stiff but not too bad.
Any help would be appreciated.

Cheers
Paul
Did you change out the tires?
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Old 07-08-2014, 03:52 PM   #5
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Quote:
Originally Posted by ERAUGrad04 View Post
Did you change out the tires?
This was my first thought. Second is are you POSITIVE that you tightened everything? Just adding spacers should cause a vibration.
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Old 07-08-2014, 05:58 PM   #6
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Did you loosen all suspension bolts and tighten at the new ride height ??
Bushing bind can have the bushings tweaked messing with alignment.
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Old 07-08-2014, 08:41 PM   #7
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They are still the stock tires.
I have triple checked all the bolts.
Yes I loosened everything then tightened everything at the new ride height.
I might remove the lift this weekend and see if it goes away.
I know stock it was very smooth.
Do you guys think my driveline angles are pushed past the safe threshold with the 2" of lift?
Not sure maybe just grasping at straws.

Cheers
Paul
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Old 07-08-2014, 08:44 PM   #8
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Possible but I doubt it.
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Old 07-08-2014, 08:55 PM   #9
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I'm sorry that I can't help, but I'm interested in your findings. I'm contemplating this same lift.
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Old 07-08-2014, 09:22 PM   #10
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There is nothing in the lift that rotates, hence cause a vibration. However, The lift may have, brought to light, some other issue you have that was not noticeable at stock height.

I suggest start with the easy thing first by rotating tires once again to see if that makes a difference. You may just have one tire a little bit out.
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Old 07-09-2014, 05:57 AM   #11
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Originally Posted by JTPhoto JK View Post
There is nothing in the lift that rotates, hence cause a vibration. However, The lift may have, brought to light, some other issue you have that was not noticeable at stock height. I suggest start with the easy thing first by rotating tires once again to see if that makes a difference. You may just have one tire a little bit out.
I agree.. Start with one side. Sometimes you hear of people with slight vibes after their tires were rotated and/or balanced until they wear in.
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Old 07-09-2014, 07:16 AM   #12
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The thing is the Jeep is still new with only 2500 miles on it.
I haven't rotated the tires as the mileage is so low.
It rode great stock, very smooth.
I do notice the suspension is very stiff, it feels every bump in the road.
My springs are 17 front and 58 rear.
Maybe its vibration from the road surface as you can feel every bump now?
Thanks guys for trying to help me on this. This forum is great.
I will remove the lift this weekend then report back.
Maybe I have to jump up to some nice riding progressive coil springs for the lift?

Cheers
Paul
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Old 07-09-2014, 09:41 AM   #13
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Originally Posted by paulyp View Post
The thing is the Jeep is still new with only 2500 miles on it. I haven't rotated the tires as the mileage is so low. It rode great stock, very smooth. I do notice the suspension is very stiff, it feels every bump in the road. My springs are 17 front and 58 rear. Maybe its vibration from the road surface as you can feel every bump now? Thanks guys for trying to help me on this. This forum is great. I will remove the lift this weekend then report back. Maybe I have to jump up to some nice riding progressive coil springs for the lift? Cheers Paul
Ok first off the ride quality should be exactly the same as it was stock. Only the handling characteristics change slightly. You have not changed springs or shocks which are the only 2 components that affect the ride. So that leads me to believe something may have been installed wrong.
- Check that the rear bump stops are installed pointy end (nose) pointed forward. If they are turned the wrong way they will hit the rear Trackbar and produce the effect that you feel.
- Also check that the rear extended swaybar links are mounted inboard and the bolts are pointed in a fashion as not to make contact with frame and brake lines.
- Check front swaybar links that they are clear.
- Check tire pressures.
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Old 07-09-2014, 09:46 AM   #14
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I just reread you original post where you state that you only installed a 1.5" spacer upfront. Did you instal the front bumpstops? If so you have effectively lost 1" of suspension travel. Those bumps are the correct length for a 2.5" lift or bigger.
As far as ride goes the whole reason people suggest a Budget Boost is because it doesn't change the ride, only the ride height. If you decide to to get a full on lift with new springs it will no longer ride like stock. Aftermarket springs are designed to carry the extra weight of bumper and winches so unless those things are on your list as well you may have a very harsh ride.
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Old 07-09-2014, 01:03 PM   #15
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Thanks Jeff.
No I didn't install the extended bump stops as it was only 1.5" spacer I used. Also never installed the front shock extensions or the longer sway bar links.
I am running the rear sway bar links on the outside as they lined up better that way, I am running wheel spacers so I have no contact issues.

Cheers
Paul
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Old 07-09-2014, 01:36 PM   #16
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Quote:
Originally Posted by paulyp View Post
Thanks Jeff. No I didn't install the extended bump stops as it was only 1.5" spacer I used. Also never installed the front shock extensions or the longer sway bar links. I am running the rear sway bar links on the outside as they lined up better that way, I am running wheel spacers so I have no contact issues. Cheers Paul
So you're feeling vibrations, no handling issues ?

Things like not extending swaybar links, loose parts are going to affect overall handling. Not produce vibes.

I'm going with tires. Remove and reseat on the hub. Make sure the rotor clips are removed from the factory too.
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Old 07-09-2014, 02:30 PM   #17
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Correct no handling issues at all. Steers perfect, wheel is straight, doesn't wander.
I think I will try the tires first then.
All clips are off as the spacers were the first thing I installed when I first got the Jeep and there were no issues.
Its definetly driving me crazy as I really like the look of it lifted but hate the ride.
Thanks guys for bearing with me on this, very frustrating indeed.

Cheers
Paul
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Old 07-09-2014, 03:54 PM   #18
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Ok so first off the ride quality is still not a product of the budget boost. Did you check those rear bumpstops?
The vibration can be caused only by a very few things.
- Exhaust harmonic vibration
- Bad wheel bearings
- Wheel out of balance
- Bad wheel spacer
- Driveshaft bent or bad joint.
- Torque Converter.
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Old 07-09-2014, 05:37 PM   #19
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Just a point of clarification. You stated in a post earlier that you tightened everything at the new ride height. It needs to be clarified that means to tighten everything with the Jeep on the wheels sitting on the ground. Tightening the bolt with the suspension hanging on jack stands will cause a harsher ride, which you mentioned after the installation.
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Old 07-09-2014, 06:41 PM   #20
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I never installed the rear bump stops.
Yes everything was tightened when the Jeep was on the ground.
I actually took it for a quick spin with everything loose then torqued every bolt to spec while on the ground.
I got that information from this forum so I was sure to do it that way.

Cheers
Paul
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Old 07-09-2014, 06:44 PM   #21
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Maybe a stupid theory but my 1.5" spacer up front is a Teraflex stack of their 1" puck plus their .5" puck.
The .5" puck is a very rigid plastic while the 1" puck is a softer rubber?
Would that transmit harshness from the road?
Hopefully you guys don't flame me too much.

Paul
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Old 07-09-2014, 06:53 PM   #22
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Quote:
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Maybe a stupid theory but my 1.5" spacer up front is a Teraflex stack of their 1" puck plus their .5" puck. The .5" puck is a very rigid plastic while the 1" puck is a softer rubber? Would that transmit harshness from the road? Hopefully you guys don't flame me too much. Paul
Did you still use the factory soft rubber isolators front and rear. If the soft isolators are in place as they are suppose to be, there is no change in feel.
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Old 07-09-2014, 06:55 PM   #23
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Check for debri in the rims (pebbles and mud) maybe even a missing weight. Seems to be a very common problem. Especially with those stupid alloy rims.
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Old 07-09-2014, 08:41 PM   #24
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Here is a shot of my front driveshaft at the transfer case.
Does this angle look too severe?
The boot on the driveshaft is about 3/4"-1" away from the exhaust.
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Old 07-09-2014, 08:42 PM   #25
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No.. The stock shafts are not prone to vibe unless damaged or missing a weight.
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Old 07-10-2014, 07:16 AM   #26
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Ok guys I solved the problem. I can't believe it was so simple.
I was under the Jeep last night and as I slid under from the front I noticed my front air dam was loose. I tightened it up went for a spin and what do you know.... no more vibes.
I am not sure how it happened maybe I bumped it doing the lift. It has those plastic push in pins and one was hanging out.
Thanks for all your help guys
I feel like a complete ass.

Cheers
paul
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Old 07-10-2014, 08:29 AM   #27
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Hahaha wow. I love/hate simple solutions. Love them because they're cheap and easy. Hate them because they're so easily overlooked. Glad to hear you're rolling smoothly again!
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Old 07-10-2014, 08:57 AM   #28
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So this was only something you heard not felt ?
Odd but glad you figured it out.
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Old 07-10-2014, 09:21 AM   #29
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No I felt the vibration through the floor.
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Old 07-10-2014, 09:27 AM   #30
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Actually .. Now that you mentioned it. My flares/liners a trimmed and not secured. I feel the liners smacking around under my feet sometimes,

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