 | Home > Puma (Tdci) > “Thud” on gearchange. |
 
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| Angus_Beef Member Since: 30 Apr 2015 Location: Oslo Posts: 434   
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Welcome to the joys of defender ownership. If I am understanding you coprrectly, that "clunk" is all the slop in the drivetrain being taken up too quickly. It takes finess to drive one sloothly. And that "thud" can be bad for the splines in your gearbox...
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22nd Jun 2020 2:44pm |
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| andydef90 Member Since: 09 Feb 2015 Location: yorkshire Posts: 617  
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try driving it gently however if its under warranty no reason to go to dealer and see what they say
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22nd Jun 2020 4:05pm |
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| Wild Card 90 Member Since: 03 Dec 2014 Location: Gerlingen Posts: 1060  
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Welcome to D2net, and congrats on your new car!
What you describe sounds like what happens when the clutch pedal sensor plays up. A minor issue that makes it remarkably difficult to drive smoothly and change gear without hearing a clonk or two. The revs will tend to "hang" more than normal, but as you´ve only just got into ownership, you won´t yet know what normal is. The defender is a somewhat eccentric drive, but shouldn´t be clonking on changes. The sensor (which simply tells the engine management that the clutch is pressed, and disengages a throttle control programme) is accessible at the rear right corner of the engine compartment. Often it suffers simply from an iffy or dry connector, and only needs unplugging and reconnecting to get it to respond (or you go down the dealership and point them in that direction). If it is not the sensor, there a re one or two other (mechanical) possibilities, but lets start with the easy one.... 1998 Tdi 90 SW, 2008 Td4 90 SW, 2012 2.2 90 SW, 2" raised Trailmaster/Terrafirma Heavy Track Raids, 255 MTs, Recaro CSs, anorak, wellingtons |
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22nd Jun 2020 4:29pm |
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| Badger110 Member Since: 06 Feb 2018 Location: South hams Posts: 1027 
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Drivetrain slack somewhere in the several dozen places the crankshaft from the engine to the driven wheels decides it doesn't want to be nice.
As has been said, it's worth having the dealer look at it if it's under warranty but you can't drive a Landy like a normal car, it does take a little slip of the clutch to get the clunk to disappear on normal use. |
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22nd Jun 2020 8:15pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 16892 
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I'd be checking for the Puma clutch rattle of death first, then for driveline slop.
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22nd Jun 2020 9:11pm |
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| Gasket Member Since: 30 May 2020 Location: Manchester Posts: 629 |
Thank you very much. I’ll start working through the list of suggestions: I’m not 100% convinced it isn’t normal noise yet - I can change gear without feeling it, it just takes a lot more patience. Will keep you informed.
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24th Jun 2020 5:50pm |
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| TheShrink Member Since: 25 Apr 2019 Location: Somerset Posts: 47
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My advice would be to listen to Blackwolf - his knowledge of Defenders is encyclopaedic.
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24th Jun 2020 10:19pm |
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| NinetyTD4 Member Since: 22 Apr 2011 Location: North Posts: 397  
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With only a couple of days into acute DEFEND-20 from infectious Defenderitis I advice to drive to somebody transformed into chronic Defendor stage 3 (III: breathes at least rust) and let this guy have a hear whether the 'thud' is the ordinary 'clunk' and will go away or is another thing broken. Never forget: cars have owner, Landrover have field service personnel.
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25th Jun 2020 8:11am |
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| lonewolf Member Since: 23 Oct 2013 Location: North East England Posts: 206 
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I experienced something similar when I first got mine, you can’t do swift changes like you can in some cars. (Some might say otherwise, who knows?) I found taking it slowly and not rushing the change helped immensely. There are quite a few joints that make up the drivetrain after all.
I’d recommend changing gear in what I’d call a sympathetic way for starters......costs nothing after all. Last edited by lonewolf on 7th Jul 2020 9:48am. Edited 1 time in total |
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6th Jul 2020 4:52pm |
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| AMBxx Member Since: 24 Jul 2016 Location: York Posts: 986 
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I've always found that changing gear in a Defender is a two stage process - one movement out of gear, then a definite 2nd movement to put it into the next. Very unlike a 'normal' car where you just shift from one gear to the next as quickly as you like.
Are there any other Manchester residents on here who could help out the OP by taking a drive (socially distanced of course!). |
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7th Jul 2020 7:50am |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 16892
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I would have thought that Manchester was packed with people who would be delighted to take his Defender for a drive and would be quite happy if he stayed home for safety, some would even be flexible enough to do it at night!
No offence intended to the honest people of Manchester. |
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7th Jul 2020 8:44am |
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| lonewolf Member Since: 23 Oct 2013 Location: North East England Posts: 206
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7th Jul 2020 9:47am |
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| Gasket Member Since: 30 May 2020 Location: Manchester Posts: 629 |
Ha ha - thanks guys.
I hit the works in the end. Had the clutch swapped for a Clutchfix unit, the output shaft replaced with the ashcroft kit and replaced the 2-piece halfshafts with 1-piece britpart shafts. It was the latter that was causing the think, which has now completely gone away. The hubs and shafts could rotate about 5-minutes due to fretting on the splines. Doesn’t sound like much but the effect was dramatic. If anyone comes across this thread with a similar issue, my suggestion would be to swap the half shafts first - it’s a quick, relatively inexpensive upgrade and eliminates a key wear point. Thank you all for your help. |
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3rd Oct 2020 10:29pm |
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| Dinnu Member Since: 24 Dec 2019 Location: Lija Posts: 3213  
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Family member, Puma 2.4, has a similar 'thud', or 'clonk' not sure what is best to describe.
Had changed to Britpart one piece half shafts, but the 'thud / clonk' did not really go away. A frame ball joint does not show wear. I have already an Ashcroft adaptor shaft in hand, but waiting for clutch kit to arrive to replace in one go. I can hear a faint rattle on idle, and clutch pedal released (gbox in neutral), which goes away when the clutch pedal is depressed. I hope the adaptor shaft and clutch solves his problem because I made him spend a few bucks  1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black |
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4th Oct 2020 7:00am |
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