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Old 02-07-2015, 10:18 PM
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Noise after lift

I got my 2014 jkur lifted about two weeks ago. I noticed a few days after that accelerating from a dead stop or slow speeds that it sounds like something is flipping or rolling over underneath near the driver seat. I brought it back to the guys that installed the lift and they said it was the exhaust heating up. They then said that they moved it away and it was perfect except a couple days later the sound started happening again. It's especially loud the times I put it in 4lo just to see if I could hear it. It seems to happen when it's cold or damp or both. Any input would be great thanks.

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Old 02-07-2015, 10:28 PM   #2
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The exhaust heating up is a poor excuse. So your shop is telling you that getting a mild lift changes the physics of your exhaust? If it has anything to do with the exhaust it is possible that they didn't tighten it up properly.

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Old 02-08-2015, 07:00 AM   #3
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Getting a mild lift wouldn't affect the exhaust unless you got an extension bracket on it during install. This still shouldn't casue any noise, I'm thinking something else.
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Old 02-08-2015, 07:15 AM   #4
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Find a new shop to go to.
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Old 02-08-2015, 07:34 AM   #5
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We need more info. What type of lift name, brand etc and pictures of undercarriage and noise areas would help too.
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Old 02-08-2015, 07:40 AM   #6
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Not sure I would describe it as a flipping sound, but on my Rubicon, there was a fairly worthless "skid" (aka maybe 2 inch wide metal bar) that the exhaust goes over pretty much right where you are describing. I clunked mine on a trail and it would make noise on accelerating. It could be the exhaust rattling against that bar when you accelerate. Have you ever gone offroad that you may have clunked that piece? (It is small and thin so doesnt take a lot to crunch it.) Do you have aftermarket skid plates?

When I had my skids installed, they removed that piece - I dont think it fits under aftermarket skids, and the skids are stronger than that flimsey piece of factory metal.
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Old 02-08-2015, 09:54 AM
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I'll get some pics when i can. But it's a rock krawler 3.5 in flex kit. It did have the teraflex exhaust extension put on too. I havnt had time to take it offroad yet since it's only been on a couple of weeks. But I also want everything to be straightened out before it leaves the pavement so I don't have any issues when I'm out there. Havnt gotten any skid plates either, but trust me they're in the plan
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Old 02-08-2015, 10:11 AM   #8
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Any parts contacting in the rear ? Swaybar links, bump stops, track bar bracket, shocks. If the rear arms were set too long .. This could happen.

I had a rear CA bolt loosen, it sounded like it was coming from the front.

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