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superG
Member
Date registered: Apr 2011
Location: Htown, TX
Vehicle(s): LX 570, SQ5
Posts: 37
| Rattle/Clicking Noise underneath G500 (with video)
This rattle/clicking noise started yesterday when I was on my way home from a roadtrip.
At first it felt like a stuck rock but after checking everything, it was still there. Occurs during acceration and freqency speeds up as faster you go.
No issues with shifting or driveability, if noise was not there, I would not think there was anything wrong.
Transfer case? U-Joint.. heat shields?...
It's going to dealership in few days but wanted to see if anyone has ideal of problem..
Part 1
https://www.youtube.com/watch?v=fgbZ6MGmwdA
Part 2
https://www.youtube.com/watch?v=zlzy6aUNATQ |
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leomd
Member
Date registered: Nov 2013
Location: Miami, Florida
Vehicle(s): 2002 G500-Bessie
Posts: 33
| Re: Rattle/Clicking Noise underneath G500 (with video)
From my Range Rover days you always knew when the transfer case was going because upon a sharp turn either a rear wheel would bind up or your would hear some severe grinding/clanking noises not consistent with what you have. Because the front prop travels at different speed than rear upon a turn a bad T-case would usually give itself away fairly quickly.
From the clicking sound I would assume its either a bad u joint with play or something is mechanically hitting the prop shafts that you can not see.
I would put the car/t-case in neutral, get underneath it and spin the prop shaft by hand checking for any play at the ujoints. You may feel play upon turning it to a specific place and only that place, so spinning it is essential. If you discover any play at all in the u-joint...it is most likely your culprit. Another idea would be to lube the u-joints and see if there is a difference or improvement in sound upon your drive. |
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AlanMcR
Expert
Date registered: Apr 2006
Location: US, CA, Los Altos
Vehicle(s): G300DT E300DT 230SL
Posts: 3500
| RE: Rattle/Clicking Noise underneath G500 (with video)
I'd guess that one of the axle CV joints is bad.
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94rover
Veteran
Date registered: Oct 2010
Location: 39.2036° N, 76.8569° W
Vehicle(s): 02 G500
Posts: 240
| Re: Rattle/Clicking Noise underneath G500 (with video)
Catalytic Converter Rattle? |
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superG
Member
Date registered: Apr 2011
Location: Htown, TX
Vehicle(s): LX 570, SQ5
Posts: 37
| Re: Rattle/Clicking Noise underneath G500 (with video)
Thanks for viewing/replies.
leomd - Does testing for prop shaft/u joint spin require G to be jacked up? I did put it in N (engine on) but was not jacked up. Could barely move the prop shalf (1/4" in either direction)
94rover - cat rattle, is that audible if vehicle is stationary and engine reving?
Additional information- Few months ago, I had a knocking noise when turning steering wheels at slow speeds and dealer replaced drag link/steering gear and that problem went away. I also had the TC in neutral issue previously and some module was replaced.
The noise is only in D and occasionally on R (I've only heard it a few times in R during F/R test). Noise also only comes during power. Turning left/right produces no noise unless it's getting power.
Gentle pressing of gas pedal at <10-15mph, I can't hear the noise but harder acc. and anything over those speeds it's noticeable.
I noticed the rattle near White Sands, NM and was worried enough to cut trip short and drove straight back to Houston. If it was a transfer case issue, would I've been able to drive such a distance (800+miles) and at West Texas highway speeds (80mph)? |
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leomd
Member
Date registered: Nov 2013
Location: Miami, Florida
Vehicle(s): 2002 G500-Bessie
Posts: 33
| RE: Rattle/Clicking Noise underneath G500 (with video)
From your videos (great job with the under chasis cam) the clicking seems driveline (torque) related to me. If you had a rattle in the cats you would hear a less distinctive sound upon heavy acceleration without being in gear. Your car also seems too young to have cat rattle - usually after many years the honeycomb of the cat disintegrates and rattles around but causes more of a subtle tinny rattle sound that is increased with throttle not torque.
An Axle CV is very possible but usually you get more of a clicking sound upon turns...but not always. You basically have 3 drive shafts, one from the tansmission to the t-case with cv-joints and then the two prop shafts with ujoints going from the tcase to the axles. Standard cv-joints are designed to last to 100k miles but can go sooner or later. I would start by looking at all three of these shafts moving them laterally to see if any play exists.
You will need to put the t-case and car in neutral to effectively spin the prop shafts.
http://www.benzworld.org/forums/g-class/174677-2002-g500-shifting-t...
Dont forget to do this on flat ground and put your e-brake on as your car will roll like crazy.
Good luck and let us know how it goes.
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Floobydust
Veteran
Date registered: Mar 2014
Location: Massachusetts, USA
Vehicle(s): 1995 E320 Cabrio, 2003 G500, 2000 SL500, 1980 TR8
Posts: 284
| RE: Rattle/Clicking Noise underneath G500 (with video)
For what it's worth, the inconsistency, the frequency spectrum of the sound itself, as well as the repetition rate don't seem like a CV or a Cat rattle to me. The repetition rate seems higher than axle speed and maybe as fast as drive shaft speed. The high frequency content of the sound seems to imply a small metal object hitting another one as the source. Have you cycled your lockers? Can you find some place soft and drive the truck with the lockers on to see if that changes things?
Keep in mind, this is coming from someone who can;t find the source of a vibration in his own truck. 
Nice job with the Go Pro - I may have to try one in my search.
- FD
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superG
Member
Date registered: Apr 2011
Location: Htown, TX
Vehicle(s): LX 570, SQ5
Posts: 37
| Re: Rattle/Clicking Noise underneath G500 (with video)
I'm taking it in first thing Tuesday. Have not tested lockers, last time I used the lockers in Arkansas (2 years ago) it wouldn't unlock so crawled 30 mins out of Buffalo River and flat bed to Little Rock where they had to clean out the line? Ever since that time, I haven't gone anywhere far offroad that required usage and the fear of another stuck lockers has kept me from testing again BUT I "should" cycle thru them every once in a while.
The recording was done on a Lecia D-Lux 5 camera which I taped to the frame. Wife wasn't happy that I used her camera. At least it wasn't my Sony A7R.
Fingers cross that it wont be an expensive repair bill as it just came out of warranty few months ago. |
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djdinaz
Extreme Veteran
Date registered: Jun 2007
Location: Arizona
Vehicle(s): 03 G55
Posts: 439
| RE: Rattle/Clicking Noise underneath G500 (with video)
crawl under your truck and look at your front u-joint. A pic from the first video (I tried a frame grab) @ around 00:28. It looks cracked.
 (ujoint.jpg)
 (ujoint2.jpg)
Attachments
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 ujoint.jpg (23KB - 1 downloads)
ujoint2.jpg (10KB - 2 downloads)
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Floobydust
Veteran
Date registered: Mar 2014
Location: Massachusetts, USA
Vehicle(s): 1995 E320 Cabrio, 2003 G500, 2000 SL500, 1980 TR8
Posts: 284
| RE: Rattle/Clicking Noise underneath G500 (with video)
Nice catch! You can also see where the U-joint end cap appears to have pulled away from the yoke at the bottom of the photo. A crack in the U-joint yoke fits with the sound track quite nicely.
Edited by Floobydust 11/9/2014 8:24 PM
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superG
Member
Date registered: Apr 2011
Location: Htown, TX
Vehicle(s): LX 570, SQ5
Posts: 37
| RE: Rattle/Clicking Noise underneath G500 (with video)
Wasn't able to find any cracks
 (1.jpg)
 (2.jpg)
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Attachments
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1.jpg (224KB - 2 downloads)
2.jpg (198KB - 2 downloads)
3.jpg (293KB - 1 downloads)
4.jpg (263KB - 2 downloads)
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Gilamonster
Veteran
Date registered: Sep 2013
Location: New Mexico
Vehicle(s): G #1 (mix of a 460, 461 & 463), #2 is a 2000 G500
Posts: 151
| RE: Rattle/Clicking Noise underneath G500 (with video)
I recently had a similar "click, click, click" noise coming from the transfer case area of my recently purchased 2000 G500.
While tracking it down I found that both rubber boots on the homeokinetic shaft were cracked. I pumped some grease into the boot and the clicking ceased immediately. That was 2 -3 months ago and it has yet to return. A new shaft goes in the week after next.
I'm not sure what mechanics are behind the boot. When I get it off I'll explore further to see what it could have been.
This is the shaft between the transmission and the transfer case. It might be worth a look.
Edited by Gilamonster 11/10/2014 1:18 AM
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superG
Member
Date registered: Apr 2011
Location: Htown, TX
Vehicle(s): LX 570, SQ5
Posts: 37
| Re: Rattle/Clicking Noise underneath G500 (with video)
Dealer ended up replacing both transmission and transfer case mounts. Anxiously waiting for flatbed to deliver it. |
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Gilamonster
Veteran
Date registered: Sep 2013
Location: New Mexico
Vehicle(s): G #1 (mix of a 460, 461 & 463), #2 is a 2000 G500
Posts: 151
| Re: Rattle/Clicking Noise underneath G500 (with video)
superG - 11/14/2014 11:22 AM
Dealer ended up replacing both transmission and transfer case mounts. Anxiously waiting for flatbed to deliver it.
Did that solve the clicking? |
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superG
Member
Date registered: Apr 2011
Location: Htown, TX
Vehicle(s): LX 570, SQ5
Posts: 37
| Re: Rattle/Clicking Noise underneath G500 (with video)
At first it seemed to be fixed but I was only driving short distances (8 miles) in normal city driving. Today I did a 50mile RT for groceries and rattle came back. This was at freeway speeds. At first it was barely noticeable but level of rattle increased. Appears as vehicle/metal heats up, the rattle comes back. Driving back home at 20-30mph, rattle is now noticeable.
Back to dealership soon. |
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Gilamonster
Veteran
Date registered: Sep 2013
Location: New Mexico
Vehicle(s): G #1 (mix of a 460, 461 & 463), #2 is a 2000 G500
Posts: 151
| RE: Rattle/Clicking Noise underneath G500 (with video)
Bummer.sorry to hear that. Maybe the exhaust? |
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Gilamonster
Veteran
Date registered: Sep 2013
Location: New Mexico
Vehicle(s): G #1 (mix of a 460, 461 & 463), #2 is a 2000 G500
Posts: 151
| RE: Rattle/Clicking Noise underneath G500 (with video)
Gilamonster - 11/18/2014 8:50 PM
Bummer.sorry to hear that. Maybe the exhaust?
Sorry, I watched the video again and definitely not the exhaust. |
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4x4abc
Date registered: Apr 2006
Location: La Paz, Baja California, Mexico
Vehicle(s): 02 G500
| RE: Rattle/Clicking Noise underneath G500 (with video)
sounds like a drive shaft related bearing (pinions, transfer case)
drain fluids and check for metal flakes
I would start with the transfer case
if none of the three - maybe the center drive shaft CVs |
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chris505
Date registered: May 2007
Location: San Francisco
Vehicle(s): '79 280E/'80 280GE/'00 G500
| RE: Rattle/Clicking Noise underneath G500 (with video)
Check the operation of all 3 diff locks, if one of them does not work as intended you may have the culprit.
If the diff locks were ever abused, broken off pieces of the diff lock teeth could ruin expensive moving parts inside the axles or tcase. |
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superG
Member
Date registered: Apr 2011
Location: Htown, TX
Vehicle(s): LX 570, SQ5
Posts: 37
| Re: Rattle/Clicking Noise underneath G500 (with video)
Checked the drive shaft CV and noticed the rear CV has some grease splatter (no idea how long it's been there). Not able to feel any cracks in the rubber.
Video Part 3
https://www.youtube.com/watch?v=rs_uMLSLoPs |
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