 | Home > Technical (L322) > Range Rover 2003 Torque Converter |
 
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| mattstevenson2005 Member Since: 01 Jan 2011 Location: Manchester, UK Posts: 737   
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Sounds like it could be a torque converter lock up clutch issue, does the judder happen at certain speeds? The lockup clutch is disabled when in sports mode which helps with this theory.
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5th Oct 2016 9:52pm |
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| miggit Member Since: 12 Jul 2014 Location: Milton Keynes Posts: 3661
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Have you considered a miss-fire? Thought I had a knackered TC, turned out to be 1.5 dead injectors |
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5th Oct 2016 10:54pm |
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| Buff Rio Member Since: 29 Dec 2012 Location: Banstead Posts: 36 
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Hi Matt
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6th Oct 2016 6:11am |
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| Haylands Member Since: 04 Mar 2014 Location: East Yorkshire Posts: 8447  
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Miggit, he's got a proper one with a petrol engine, they don't get misfires... |
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6th Oct 2016 1:55pm |
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| Buff Rio Member Since: 29 Dec 2012 Location: Banstead Posts: 36
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6th Oct 2016 2:32pm |
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| miggit Member Since: 12 Jul 2014 Location: Milton Keynes Posts: 3661
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6th Oct 2016 2:38pm |
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Get a fault light even from a dodgy spark plug, that's more than impressive 
, it really did feel like the TC clutch was well on it's way out, the second that I drove it having cleaned / rebuilt the injectors, the car was silky smooth 
| Buff Rio Member Since: 29 Dec 2012 Location: Banstead Posts: 36
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Thanks Miggit, I did have that on my diesel one but don't think this is the same 2006 3.0 TD6 Vogue Black - sold
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6th Oct 2016 2:46pm |
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| RRPhil Member Since: 22 Aug 2011 Location: Blackburn, Lancashire Posts: 993
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I�m not a fan of fluid additives (friction modifiers) because of the risk that they may trash all of the controller�s adaptive learning but � if you already have Dexron in there - for the sake of �12 you could temporarily �shudder fixx� your fluid just to prove the LUC is at fault and then remove all trace of it when you replace the torque converter (as you�d be doing a full transmission refill with the correct fluid).
Phil Admin note: this post has had its images recovered from a money grabbing photo hosting site and reinstated 
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6th Oct 2016 2:47pm |
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| mattstevenson2005 Member Since: 01 Jan 2011 Location: Manchester, UK Posts: 737
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This additive looks very interesting to see if it solves his issue
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6th Oct 2016 4:42pm |
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| Buff Rio Member Since: 29 Dec 2012 Location: Banstead Posts: 36
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Thanks Phil, but I tried this before I had the gearbox oil changed and it didn't stop it. Some fluid came out when I was putting it in and that was red like normal ATF so maybe it is the wrong ATF ? 2006 3.0 TD6 Vogue Black - sold
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7th Oct 2016 4:49am |
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| RRPhil Member Since: 22 Aug 2011 Location: Blackburn, Lancashire Posts: 993
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There are a couple of issues with the torque converter lock-up clutch on the 5HP24 :
I have stripped a number of 5HP24s that had been filled with Dexron, for example, and seen the consequences. Wear � The 5HP24 LUC uses a captive clutch (i.e. the LUC piston spring retainer is friction welded into position on the centre tower) where the total piston movement is only around 1mm.
It therefore takes relatively little wear of the friction plate to upset the return spring preload and this seems to typically happen soon after the 100k miles mark is reached. Once the friction plate wears you start to hear the �cattle grid� noise. I replaced mine at 107k miles and when I stripped the TC I found that there was still material left on the LUC friction plate but no oil grooves.
Another forum member (ghur) hadn�t caught his soon enough :
Because of the welded �captive clutch� design it�s very important that, if you have one of these TCs re-manufactured, you send it to someone who has a lot of experience - and the necessary kit - to re-weld the retainer plate accurately back into position after the friction plate has been replaced. Do you have any paperwork that says who re-manufactured your TC 18 months ago? Assuming that the TC re-manufacturer did replace the LUC friction plate it would seem most likely that your LUC shudder will be due to the fluid (friction coefficient). Your dilemma is that it will be quite expensive to do at least three drain & refills with the correct fluid to get the bulk of the old stuff out of the system. Phil Admin note: this post has had its images recovered from a money grabbing photo hosting site and reinstated
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7th Oct 2016 9:11am |
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| miggit Member Since: 12 Jul 2014 Location: Milton Keynes Posts: 3661
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Is it not possible to power flush the gearbox? like you can on the TD6, keep adding fluid at the filler and removing it at the cooler return?
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7th Oct 2016 9:39am |
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| Buff Rio Member Since: 29 Dec 2012 Location: Banstead Posts: 36
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Thanks Phil
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7th Oct 2016 9:40am |
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| Haylands Member Since: 04 Mar 2014 Location: East Yorkshire Posts: 8447
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Miggit's idea is good, otherwise you have to do at least three oil changes....
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7th Oct 2016 11:50am |
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