JEEP wrangler help cant find the problem - JeepForum.com

 
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post #1 of 13 Old 09-30-2015, 07:51 AM Thread Starter
MyToyWifesJeep
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JEEP wrangler help cant find the problem

Please Help!!!! I'm sure this is out there some where but I have searched and searched and no luck. I have a 98 tj 4"Unknown lift 1' coil spacer in front, and stock control arms.
new built 8.8 with teraflex sye and cv shaft in rear. gears are new 4.10s.

The problem is when I accelerate only from a slow roll like 5 or 10mph I get a rattling popping noise, like if you ran your knuckles across a sheet of bumpy metal or dropped a marble in a plastic bowl and it bounced. it sounds like its under me. "I think its the same noise" i hear while its in drive at a stop, only once in a blue moon but its not as loud. doesn't do it at cruising speeds. I can baby it and it does make the noise. I can also step on it like pedal to the floor and it wont make the noise. it only does it like a mild take off.

I replace the tranny mnt about a year go still looks good. the motor mnts look good also.

my first thought was my front d/s so I pulled it out and drove it. the noise is still their. also my sway bar links are new and tight. my exhaust feels tight no metal to metal. I wouldn't think my control arms would make this noise. would it? I feel like I have checked everything.

I do have slight play in my front axle u-joints but very little any possibility? Please help.

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post #2 of 13 Old 09-30-2015, 07:57 AM Thread Starter
MyToyWifesJeep
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jeep

It's my wife's dd so I want to make sure its safe
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post #3 of 13 Old 09-30-2015, 07:59 AM
bbradUSMC
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Pull the rear shafts and see if the noise is still there.
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post #4 of 13 Old 09-30-2015, 08:12 AM Thread Starter
MyToyWifesJeep
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not the rear d/s

its not the rear d/s it did it when I had the d35 and old d/s in
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post #5 of 13 Old 09-30-2015, 02:47 PM
BayouRunner
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One of my control arms would pop and drove me crazy for months because I couldn't figure out where it was coming from. Would only make noise at low speed, when shifting from reverse and into drive. It was only a single pop though. Nothing was loose enough where it could move by hand. But I did have one bolt that was not torqued enough. I went ahead and checked them all. Not sure if this is your problem but it sure took me a while to figure it out
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post #6 of 13 Old 09-30-2015, 02:58 PM
MDTJ
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Do you have a lunchbox locker in our d30? They "ratchet" when you turn which is easier to hear at slow speeds.

My control arms only pop once per weight shift (forward, back typically). Then I torqued them correctly and it stopped.

Great resources I put here so I can find 'em when I need 'em.

TJ Boot Camp
STOCK TJ SPECS
TJ FAQ
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post #7 of 13 Old 09-30-2015, 03:07 PM
J03_TJ
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Wondering if it at low rpm when the engine is lugging? Like if you were trying to move from a stop uphill like a steep driveway? Could it be your engine making a dieseling noise kind of like pre-detination? I've read plenty of jeep engines make this noise, especially when the engine is lugged.
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post #8 of 13 Old 09-30-2015, 03:40 PM
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Shoot me a PM, I have friends in Savannah that can help you out. Check FB for Low Country Mud Rats.
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post #9 of 13 Old 09-30-2015, 04:30 PM Thread Starter
MyToyWifesJeep
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No locker up front and a control arm would make more of a one loud pop
at Jo3 tj its around 2k rpms give or take
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post #10 of 13 Old 09-30-2015, 04:37 PM Thread Starter
MyToyWifesJeep
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to jo3 tj about Wondering if it at low rpm when the engine is lugging?

the jeep doesnt lug with the 4.10s and the 3spd auto and here in savannah its all flat ground





my jeep before the 35s
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post #11 of 13 Old 09-30-2015, 05:11 PM
J03_TJ
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Quote:
Originally Posted by MyToyWifesJeep
to jo3 tj about Wondering if it at low rpm when the engine is lugging? the jeep doesnt lug with the 4.10s and the 3spd auto and here in savannah its all flat ground my jeep before the 35s
Okay, was just seeing if maybe it was an engine noise at low 1000 rpm range. No clue what it is just thougt I'd mention that.
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post #12 of 13 Old 09-30-2015, 06:27 PM Thread Starter
MyToyWifesJeep
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correction just drove to the store and it makes the noises at 1,400 rpms and about 15mph
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post #13 of 13 Old 10-02-2015, 08:11 AM Thread Starter
MyToyWifesJeep
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so after replacing my axle u-joints yesterday i took it for a drive and guess what the noise was still there. so for about 2 hours i search the whole jeep again and I FOUND it , It is my transfer case shifter linkage where it goes into the bracket that bolts to the driver side floor. the rubber part had dry rotted and vanished.
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