 | Home > Puma (Tdci) > Diagnose this noise! Transfer case or gearbox whir/whine? |
 
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| carpdvl Member Since: 30 Jul 2018 Location: Sydney Posts: 4   
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Hi all,
So I have done fairly extensive investigations on a noise that began in my driveline about 3 months ago on a trip to the snow (well... it at least became very apparent then). Initially I thought it was front diff but have since narrowed it down based on a bunch of tests. The car is a 2011 Puma 2.4 that has done 96k. Frustratingly, I dropped it to a well known independent locally to fix the noise and install a new clutch. Ended up spending just shy of 3k having the TC and gearbox pulled apart (note that also includes fitting a new clutch in labour costs). Importantly, same indie did a full TC rebuild (seals, bearings etc) a year prior so the cost did not include cost covered by the warranty on the labour and parts on the TC... The full work supposedly uncovered the following: Gearbox was fine (incl. all bearings), needed new detent springs and obviously seals Transfer case intermediate shaft bearing was kaput after a year (wish had looked at this prior to gearbox...) And that's about the extent of it... Within about 5 minutes of getting it back and overcoming the joy of having my toy back dread filled me as I realised I could still hear this whine. Took it back in immediately and was told "that is weird" and "that doesn't sound like a bearing" and "drive it a while and see if it goes away - if not bring it back in" In the interest of getting a further opinion: Can anyone get closer to an accurate diagnosis? Here are the symptoms (with my assumptions): Whining noise that increases with road speed (does not vary with RPM - rules out input shaft in gearbox) The noise is present when the TC is in neutral and rowing through the gears (rules out output shaft in TC, diffs, handbrake etc. - so now we have output shaft in gearbox, input shaft in TC and intermediate shaft) Noise is not present if both gearboxes are in neutral and I roll it up to 60kph+ down a hill (again disqualifies diffs and output shaft in TC + handbrake etc) Noise increases significantly when in low range - almost to the point when getting up to 50kph or so in 6th it sounds like a carnival ride Noise seems to become more "whirring" when the clutch is engaged (i.e. when I let go of clutch and it is in gear) but still whines when clutch is stomped in On which basis it seems like it is most likely transfer case related but still doesn't isolate the output shaft on the gearbox I guess... I have uploaded some videos from tonight driving in low range. The noise is a high pitched whining noise almost spinning-top like: https://www.youtube.com/watch?v=jTzPtlgSCgA From 10 seconds you can hear it in this one like its trying to take off. https://www.youtube.com/watch?v=sOUB7hTclnk Can hear in this one decelerating at 9 secs in https://www.youtube.com/watch?v=SgFl6po-ZSA Can hear from when I grind the gears briefly at about 10 seconds in Any help please! Would be great to have in mind what I want done when I take it back to be fixed properly... Cheers in advance carpdvl |
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16th Sep 2019 1:11pm |
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| Grenadier Member Since: 23 Jul 2014 Location: The foot of Mont Blanc... Posts: 5829  
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I get that noise, or used to. Loosened the hand brake drum where it is connected to transfer box. Seems to have stopped it. Think it is nothing more than the drum ‘scuffing’ the opposing face. Try loosening it a bit and see what happens. Also, the drum seems to ‘wind itself on’ during long drives (noticeable with a tighter handbrake lever) which makes it worse. Conversely, I could make it stop when it was whirring by shaking the lever, side to side, up and down and trying to release some tension/add some slack. Seemed to work. Mind you, could be a placebo effect.
Loosen off the drum a tad and see what happens....  Monsieur Le Grenadier
I've not been everywhere, but it's on my list..... 2011 Puma 110DC - Corris Grey |
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16th Sep 2019 1:17pm |
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| deaallen Member Since: 15 Feb 2016 Location: Basingstoke Posts: 264  
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edit: nm, I was wrong and mine is very different from those in the videos
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16th Sep 2019 1:36pm |
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| carpdvl Member Since: 30 Jul 2018 Location: Sydney Posts: 4
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Thanks Grenadier - I was thinking that myself but then it doesn't explain it happening when stopped and the transfer case is in neutral, or when letting the car coast with both gearboxes in neutral! It has me stumped - short of assuming that the shop missed something  |
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16th Sep 2019 1:49pm |
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| carpdvl Member Since: 30 Jul 2018 Location: Sydney Posts: 4
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Thanks DG. They've been on for just shy of 9 or 10,000 metric units... so what's that... 6,000 or so imperials? Also unfortunately doesn't explain the whine when stationary and running through gears with the TC in neutral  |
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16th Sep 2019 1:50pm |
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| PAT303 Member Since: 25 Feb 2013 Location: Australia Posts: 125
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Both my Defenders have a whine in neutral, the Tdi has been doing it for 20 years.
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18th Sep 2019 11:29pm |
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| PAT303 Member Since: 25 Feb 2013 Location: Australia Posts: 125
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Just remember that defenders have no sound proofing, they make all types of strange noises because you can hear everything working.
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18th Sep 2019 11:32pm |
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| carpdvl Member Since: 30 Jul 2018 Location: Sydney Posts: 4
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 Yep something I have had to get used to. The perfectionist in me cringes at every new sound though am usually able to discount when they are fairly innocuous.
This noise though has developed over the last 3 months (no problems since owning car for the 18 months prior) and its loud enough in low/highway cruising speeds it concerns me. Last thing I want is to be remote and one of the transmissions to give up the ghost due to a bad bearing or something similar... Guess what I would like is some expert opinions if anyone has had something similar as to what they think it is so I have some theories with the mechanic when I take it back! |
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19th Sep 2019 5:53am |
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| jst Member Since: 14 Jan 2008 Location: Taunton Posts: 8050  
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It makes the noise when stopped? If so its engine related. Handbrake noise as above described by gren would be present when ever the vehicle is moving regardless of gears selected. Haven't listened to clips yet , will do in due course. Cheers James 110 2012 XS Utility 130 2011 M57 bespoke Camper 90 2010 Hardtop 90 M57 1988 Hardtop |
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19th Sep 2019 6:49am |
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