 | Home > Technical > Transmission "clunk" - 2011 Defender 90 hardtop - |
 
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| shropshiredefender Member Since: 05 Jun 2017 Location: Shropshire Posts: 834   
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I'd take a look at the rear drive shaft flanges, if they have not been greased as part of the service routine the splines will be worn. Just because you're offended doesn't mean you're right.
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8th Aug 2021 12:35pm |
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| Tractorman Member Since: 08 Jul 2016 Location: Inverclyde Posts: 41  
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Many thanks for your reply - UJs have always been greased at service intervals - excuse my ignorance but where are the rear drive shaft flanges?
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8th Aug 2021 1:46pm |
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| shropshiredefender Member Since: 05 Jun 2017 Location: Shropshire Posts: 834
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Lots of threads on the subject - take a look here for pics - https://www.defender2.net/forum/topic76634...ive+flange
They live in the centre of each wheel and are held in by 5 bolts. Remove the rubber cap to see the half shaft splines, they should be well greased. If they are dry and rusty they will "clunk" and eventually the splines will wear away. Just because you're offended doesn't mean you're right. |
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8th Aug 2021 2:11pm |
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| Tractorman Member Since: 08 Jul 2016 Location: Inverclyde Posts: 41
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Many thanks Shropshiredefender - that is extremely helpful and much appreciated! Before I rule out the propshaft would you think it is normal for a slight amount of play when rotating by hand - I guess it is between 1/4" & 1/2" both ways - it certainly is not rock solid.
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8th Aug 2021 4:00pm |
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| shropshiredefender Member Since: 05 Jun 2017 Location: Shropshire Posts: 834
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If rotational play and the transfer box and diff flanges are also rotating as if it's all one unit then probably O.K.(handbrake off).
Handbrake on there should be no rotational movement. If you can move the propshaft up or down at either end (handbrake on) then the universal joint needs replacing. Just because you're offended doesn't mean you're right. |
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8th Aug 2021 4:23pm |
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| Mo Murphy Member Since: 01 Jun 2008 Location: Letchworth Garden City, Herts Posts: 2244  
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It's pretty hard to properly assess a UJ without removing the propshaft.
Mo The Land Rover 90 - Many are called, few are chosen. 50 Shades of Pennine Grey |
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8th Aug 2021 4:54pm |
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| Gasket Member Since: 30 May 2020 Location: Manchester Posts: 629 |
I had exactly this issue on a 50k mile 90. A distinct thunk when taking up drive when changing gear.
Went through everything to be sure (clutch, output shaft, propshaft UJs and diff pinions). In the end it was exactly as per the above - wear in the rear drive flanges: the shafts could move a few degrees in the flanges due to wear. I learned from the site that high torque plus a less than amazing grade of steel mean these parts wear quite fast. Land Rover solved this issue with 2012 (?) onwards vehicles by switching to one piece halfshafts. We did this and the issue was instantly fixed. It’s not an expensive or difficult job - the LOF/Britpart rear shafts are actually good quality and very reasonable. |
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9th Aug 2021 2:29am |
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| diesel_jim Member Since: 13 Oct 2008 Location: hiding Posts: 6093 
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A frame balljoint make a huge difference too; just changed the one on my 110 and it's become soo much smoother and less clunky.
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10th Aug 2021 5:07am |
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| LR90XS2011 Member Since: 05 Apr 2011 Location: bickenhill Posts: 3643 
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if you want a pretty much car like transmission without clunks
1/ replace rear 1/2 shafts with 1 peice (lots of options or just buy some off a scrapped Discovery 300 tdi) 2/ replace the gearbox to transfere box shaft with Ashcroft or LOF alternatives 3/ replace the clutch for one without crap springs in the middle 4/ check and if required replace rear A frame bush 5/ replace the front diff for an upgraded one (the ones in 2011 90s are known to fail, play is the first symtom) 6/ replace the rear diff for an upgraded one 7/ check and if required replace prop shaft ujs use search on here loads of info on all these issues DEFENDER 90 TDCI XS, I hope everyone is well and your land rovers make you happy |
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10th Aug 2021 6:00am |
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| Co1 Member Since: 19 Aug 2018 Location: North Yorkshire Posts: 3678 
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Deleted. Wrong post!
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10th Aug 2021 5:24pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17441 
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^^^ There, I have fixed your post for you!  |
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10th Aug 2021 6:17pm |
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| Co1 Member Since: 19 Aug 2018 Location: North Yorkshire Posts: 3678
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10th Aug 2021 6:22pm |
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| Tractorman Member Since: 08 Jul 2016 Location: Inverclyde Posts: 41
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My "clunk" from underneath has got worse (I was unable to investigate further due to recent major operation - now on the mend) - I took the Landy out today and suddenly there was a loud noise and I lost all drive ability - had to be towed home. I thought at first that a half shaft had broken but when I jack up the rear end both wheels rotate the prop shaft. However if I put it in gear the rear wheels still rotate the prop shaft with no resistance. Could it be the transfer box? The Landy has only done 57k miles of easy driving - no off road and very limited towing.
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7th Sep 2021 10:08am |
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| LandRoverAnorak Member Since: 17 Jul 2011 Location: Surrey Posts: 11324
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It's very likely the adapter shaft between the gearbox and transfer box. This is a splined connection that has been shown to wear on many (but not all) vehicles. The solution is to replace with an Ashcroft shaft that provides for automatic lubrication of the joint or a LOF single piece shaft that doesn't have the joint at all. There are pro's and con's for each and fans of both. The latter is a more radical solution in that it's a completely different design but it hasn't been around long enough to demonstrate if it's ok in the longer term. Darren
110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak "You came in that thing? You're braver than I thought!" - Princess Leia |
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7th Sep 2021 10:18am |
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