Question about 2002 Jeep Wrangler

1 Answer

Load knoking noise coming from in side midle of dashboard near radio when over 55 mph, no other symptons

No vibration, no change in rpm or speed, intermitent- just load noise in cab

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  • Jeep Master
  • 20,706 Answers

Dash knocks. 2002 wrangler.

that\'s a good one but id do this.

1: kill the whole HVAC system power, (FUSE pulls) under stand how.

if this is not clear, ask or read the FSM page on HVAC.

it might be a berserk damper motor (device)

this car is TJ

using 2 persons to find noise works best and at 55 that big time danger. no? so do that, one drives. other uses a rubber hose to his

ear to find LOCATION, like in real estate, location is every thing, LOL.

its not a bad speedo cable, there is no such ani-mule on this car.

electronic end to end.



before working on any car, 96\' to now, defeat the air bags per FSM

first or get broken neck or worse at 55mph. really... RTM.

DO not ever work on cars with no FSM or find your self, playing harp.



I put my bet on HVAC

and using a real scan tool not autozoned junk, and see if you

have HVAC DTC errors.

i use a Innova 3160 and it shows them all. (so do others)

the $29 code readers are pure junk, on newer cars.

ok on 1996, but not newer cars with CAN buss or advanced electronics like ours.



SCAN IT FIRSTS ! THEN ASK QUESTIONS.

fooling around air bags at 55mph is fool hardy.

Posted on Apr 23, 2014

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Posted on Jan 02, 2017

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SOURCE: loud vibration on 2005 jeep liberty when under load.

Sounds a lot like a wheel balance problem, Does vibration go away over 55? In checking driveshaft joints...If you looked at them with the vehicle in park with the wheels on the ground, the shaft is "loaded" and cannot be correctly checked. To do this properly, vehicle should be in neutral with both rear wheels off the ground. Sometimes a joint can appear to be tight but still be bad. Check for traces of powdered rust around the rubber boots right where the end caps meet the cross on the inside. Any rust there indicates lack of grease and the likelyhood that the joint is frozen.
Check both balance and joints. Good luck.
Don't forget to rate my answer after you find the problem.

Posted on Mar 27, 2009

  • 1857 Answers

SOURCE: There is a very bad vibration on the front driver

get it inspected before it falls of and destroys the front end if you want to be sure.

Posted on Apr 04, 2010

csmock132
  • 4669 Answers

SOURCE: My 2002 Jeep Grand Cherokee has a slight vibration

I'm thinking tires. Have the balance
checked.

Posted on May 14, 2010

  • 6982 Answers

SOURCE: 2003 Jeep Grand Cherokee Quadra

Vibrations usually don't make noise BUT, a bad hub bearing or a differential that is severely worn can.
Bearings generally don't both fail at the same time so if you hear the noise on one side more than the other, likely that one has failed. You should also check the diff fluid level. (low lube level will quickly destroy the gear set) I'd go as far as removing the cover and checking the gears and looking at the lube itself to see if it has any metal in it.
I could tell you much more by driving it but obviously I can't do that!!

Posted on May 07, 2011

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Vibration and noise coming from where?? Front? BAck? During low speed? High speed? While in 4x4? Be more specific for help

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1.) if its a carburetor type engine, You may need to adjust the RPM to increase or lower the Idle. Its commonly called the Ideal screw and adjust the air fuel ratio to stabilize the engine fuel mixture to increase the RPM.. its found on the Carburetor.

2.) ts fuel injected you will need to adjust the throttle body position to archive the same effect.

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  • If the bearing fails and seizes up, the rubber will be torn away from the bearing. The seized bearing can tear away the rubber mount that supports the outside of it allowing the bearing to rotate with the driveshaft. This allows the driveshaft to wobble up and down causing a vibration.
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    NOTE The engine, torque converter and driveshaft change in frequency as rpm changes. A rebuilt torque converter is often the cause of a vibration that is rpm-related.

    To help differentiate a potential drivetrain problem from other common sources of noise or vibration, it is important to note the speed and driving conditions at which the problem occurs. Unfortunately, it is often difficult to accurately pinpoint drivetrain problems with only a road test. Expand the undercar investigation by putting the vehicle up on the lift, where it is possible to get a good view of what is going on underneath.

    • Check the companion flange, carrier bearing, pinion shaft seal, and pinion bearing, transmission's extension housing seal and bushing, and the u-joints.
    • Check the driveshaft for runout, or the amount that a part wobbles up and down or side to side when it is in motion.

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I have 2009 D22 double cab it has done 43 000Km, however I have two concerns. The first is noisy tappets usually only when the vehicle has been standing for a day or two, however it only lasts for a few...


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Also,at the last oil change,has the proper oil viscosity been used?
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