| Author |
Message |
    
Jason Vance
| | Posted on Thursday, April 11, 2002 - 01:59 pm: | 
|
I looked through the archives and didn't find one like this...have a look and tell me what you think!
At speeds below 30 mph, while coasting, constant speed, or under very slight acceleration, I hear a clunking coming from the front end (no specific side, can hear it from both the driver's and passengers side). It sounds like horses hooves on concrete. The frequency of the sound increases with vehicle speed, however it goes away under even the slightest brake pressure and while turning.
Any ideas? Diff, U-joint, brakes? I have no other brake symptoms (no squealing, grinding, or noticable pulsations due to warped rotors and the like) and there is no other grinding or clunking from the front end going around turns or at high speed, etc. There is, however, the "clunk" that is due to slack in the driveline, where you blip the throttle after coasting and you can feel the drivetrain snap taught.
Anyways, the frequency of the noise is too low to be occurring before the differential (drive shaft, transfer case, etc)...it sounds like it is occurring about once per revolution of the axle. I hope this is enough info to narrow down at least a handful of problems!!! |
Anonymous
| | Posted on Thursday, April 11, 2002 - 08:00 pm: |
|
You describe it as a clunk? Could it sound more like a metalic rattle? |
doug james (Dgj95lwb)
| | Posted on Thursday, April 11, 2002 - 09:09 pm: |
|
CV joints?
Start by tightening the wheel brgs. That would remove 2 noise sources: 1:brg play/oscillation, which causes.....2:brake rotor and pad oscillation noises. Hope this is it and not worn cv which are $$$. |
Jason
| | Posted on Friday, April 12, 2002 - 02:02 am: |
|
Anon,
the sound is a "clop clop clop," about once every revolution of the axle. It sounds like horses' hooves on concrete...you know, like during a parade or something?
I'll check out the wheel bearings Friday afternoon. I would definitely rather it be CV joints than a toasted diff, ring, and pinion, but hopefully it is as simple as the wheel bearings. |
Zinhead
| | Posted on Friday, April 12, 2002 - 10:01 am: |
|
the sound is a "clop clop clop," --
Could be that the tires are cupped. The inside of my rear tires are cupped and thats the sound they make. |
Milan
| | Posted on Friday, April 12, 2002 - 12:07 pm: |
|
Sounds like wheel bearings. I think the CV would be noisy especially when turning. I would not wait to check the bearings though. It's easy to check them and then you'll at least know if it's safe to drive.
Let us know hwat you find out. |
Mike J. (Mudd)
| | Posted on Friday, April 12, 2002 - 01:24 pm: |
|
is it easy or tough to pack the bearings? I need to but first of all I don't have the 2 1/16 hub nut socket. MJmudd |
Anonymous
| | Posted on Friday, April 12, 2002 - 01:54 pm: |
|
I just replaced the motor mounts on my 97 disco 1 for this exact reason. Check them out. I wasted alot of time and unneeded parts trying to find out where that clop, clop noise was commin from.
Did them myself, but needed an extra person there to help.
Dan S |
Milan
| | Posted on Friday, April 12, 2002 - 02:43 pm: |
|
Noises are hard to diagnose, especially over the Internet.  Wouldn't broken/loose engine mount noises be more rpm related rather than driving/rolling related? |
Chris Welch (Asigiam)
| | Posted on Friday, April 12, 2002 - 10:32 pm: |
|
I know this sounds crazy, but mine did that too and it was that front piece of plastic on the bumber loose. It only moved if the wind was pusing it around just right. Ever since I got sandwiched between a Rodeo and Cherokee, the noise has not been back. But you don't have to fix it like that if you don't want to. |
Jason
| | Posted on Saturday, April 13, 2002 - 01:11 am: |
|
LOL!!! I think I figured it out! I pulled the wheel and took a gander at the front hub. No play, nothing bearing or CV related. The noise...was coming from the brake pads and the two shafts that locate them within the calipers! The pads were sliding up the rotor, within the play that the rods allow, and dropping back down creating a "clop" sound that echoes within the wheel and wheel-well.
This is definitely a sigh of relief...however, I also discovered the panhard-rod bushings were worn which is causing the play in the steering (unrelated problem, not causing any noise...yet).
Nonetheless, I've got a Bentley and a Haynes manual on the way, and I'm ready to break out the tools for more fun! |
Milan
| | Posted on Saturday, April 13, 2002 - 11:20 am: |
|
Hehehe. That's good. Funny about the bumper. I was not really questioning any of the suggestions. As I said, noises are sometimes funny to diagnose and especially without hearing them. Mine were the wheel bearings and it sounded like Jason described and they even went quiet when I got on the brakes, so I thought it was the brakes. Until one gave out welding itself to the spindle. I cought the second one before it disintegrated because I alredy new the symptoms. This was on Bronco. |
Jason
| | Posted on Saturday, April 13, 2002 - 01:47 pm: |
|
Thanks for all of the advice. If nothing else, it provides me info for things to check on in the next few thousand miles; preventative maintenance is usually less costly than repairing something that broke!
I rechecked the panhard rod bushing and it appears the bolt just needed to be torqued down. The steering is now in check and the little noise from the wheels is still there at low speeds, and still goes away when the brakes are applied. On the 'to-do' list is a brake job first, then a Polybush kit. Any recommendations on brake kits? I know I need to get some VENTED rotors in the front (what were these guys thinking...).
I can get Powerstop cross-drilled and slotted rotors for $100 per corner; however, is the hi-po kit sold by Atlantic British worth the money (cross-drilled and slotted rotors, pads, seals/gaskets, etc.), or can I do better piecing them out from other discount auto-parts places?
Thanks again, DiscoWeb!!!!! |
|
Closed: New threads not accepted on this page