Member Since: 28 Aug 2006
Location: Mid-sussex
Posts: 2021
Transmission "Knock" at Slow Speed
I have been a member for a few days - great site. Finding out that I was not just an old worry guts, there were problems, and still are. How about this one - when driving slowly in a queue of traffic, it is really hard to get the drive to take up smoothly - tend to get a "knock". Last time I had this was in my 10 year old Vauxhall Viva, back in '83. Dealer dismissed it.
31st Aug 2006 8:59 pm
DG Site Moderator
Member Since: 12 Dec 2005
Location: The Gaff
Posts: 50979
So tell us a bit about the motor first Barn1e ...model, transmision etc21 year LR veteran > D2 GS 2003 > D3 S 2006 > D3 HSE 2009 > D4 HSE 2013 > D4 HSE 2015 > D5 HSE 2018 > DS HSE R-Dynamic P300e 2021
31st Aug 2006 9:02 pm
norto
Member Since: 10 Apr 2006
Location: batemans bay
Posts: 1605
Barn1e
Welcome
Is yours an automatic
it sounds like dvive line backlash
mine does it too, im not sure if it can be fixed
31st Aug 2006 9:19 pm
DG Site Moderator
Member Since: 12 Dec 2005
Location: The Gaff
Posts: 50979
If you do have an auto then as the motor slows (say <10mph) the torque convertor releases .....and then as you begin to accelerate it re-engages ....sometimes this process can give a clunk or knock. There's absolutely nothing wrong with it .....though I guess that some may experience more of a clunk than others ...ands especially if you have noticed it you will tend to be listening all the time 21 year LR veteran > D2 GS 2003 > D3 S 2006 > D3 HSE 2009 > D4 HSE 2013 > D4 HSE 2015 > D5 HSE 2018 > DS HSE R-Dynamic P300e 2021
Last edited by DG on 31st Aug 2006 9:42 pm. Edited 1 time in total
I think there may be a TSB relating to this, I'll check.....The End
31st Aug 2006 9:37 pm
SN
Member Since: 03 Jan 2006
Location: Romiley
Posts: 13710
Hovering my mouse pointer over Barn1e's D3 logo reveals he has a Tonga Green Auto 8)Steve N | 21MY Defender | 08MY Discovery 3 (history) | 06MY Discovery 3 (ancient history)
31st Aug 2006 9:40 pm
DG Site Moderator
Member Since: 12 Dec 2005
Location: The Gaff
Posts: 50979
Why are you hoovering....isn't that a womens job 21 year LR veteran > D2 GS 2003 > D3 S 2006 > D3 HSE 2009 > D4 HSE 2013 > D4 HSE 2015 > D5 HSE 2018 > DS HSE R-Dynamic P300e 2021
31st Aug 2006 9:44 pm
SN
Member Since: 03 Jan 2006
Location: Romiley
Posts: 13710
Hovering mate, hovering!
Hoovering is actually a task for the cleaner, not the missus! 8)Steve N | 21MY Defender | 08MY Discovery 3 (history) | 06MY Discovery 3 (ancient history)
31st Aug 2006 9:45 pm
DG Site Moderator
Member Since: 12 Dec 2005
Location: The Gaff
Posts: 50979
'Hovering' is worse....thats what George Michael does in the toilets isn't it 21 year LR veteran > D2 GS 2003 > D3 S 2006 > D3 HSE 2009 > D4 HSE 2013 > D4 HSE 2015 > D5 HSE 2018 > DS HSE R-Dynamic P300e 2021
'ere ya go.... This actually refers to the V8 but AFAIK it's the same gearbox so could/should be applicable to the TDV6 too Probably at least worth talking to your dealer about it
Technical Service Bulletin No. LA307-003
Subject/Concern: Discovery 3/LR3 - Harsh 2 to 1 Transmission Downshift
Summary:
A customer may report a concern that when the throttle is re-applied following deceleration in traffic and the vehicle is almost coming to a stop, the gearshift is harsh and results in a thump or bump when the transmission shifts from second to first gear. The problem can be intermittent and can vary depending upon the amount of throttle that is re-applied.
Cause: An automatic transmission software calibration issue is the cause of the above complaint.
Action: Should a customer express concern regarding the above, refer to the Service Procedure detailed in this bulletin to update the control module software.
I'll see if there's anything else relevant...The End
31st Aug 2006 9:56 pm
Barn1e D3 Decade
Member Since: 28 Aug 2006
Location: Mid-sussex
Posts: 2021
Thank you for your thoughts. Yes, I have the auto and sorry I did not show my profile info (how do I get that onto my postings?) The change down to first makes sense now - at slow speeds I am probably in second gear, as I apply load to move a bit faster, if shifts down, hence the knock. I had the last sw upgrade last July, but no noticeable difference. Will keep an eye on it and mention the known problem when it goes back to dealer.
If M25 gets any slower, it wont be a problem anyway!
and posting my car details......? (going in search of online help - unless someone gets to me first)
1st Sep 2006 8:35 am
Barn1e D3 Decade
Member Since: 28 Aug 2006
Location: Mid-sussex
Posts: 2021
Found it, so with luck it will appear below this message..2005, TDV6 S, Auto, 190k miles, owned from new, V8 Brake Upgrade, Nancom Evo, RLD protector, BAS EGR blanking & Remap, separate ATF cooler, changing all the fluids ahead of time.
1st Sep 2006 8:40 am
catweasel
Member Since: 05 May 2006
Location: Bundaleer
Posts: 4805
it seems you have luck on your side
1st Sep 2006 8:48 am
simon
Member Since: 11 Jan 2005
Location: Shropshire
Posts: 18296
qzdcg8 wrote:
Hovering my mouse pointer over Barn1e's D3 logo reveals he has a Tonga Green Auto 8)
huh... never knew you could do that nice one martin
1st Sep 2006 9:47 am
DG Site Moderator
Member Since: 12 Dec 2005
Location: The Gaff
Posts: 50979
or Steve even 21 year LR veteran > D2 GS 2003 > D3 S 2006 > D3 HSE 2009 > D4 HSE 2013 > D4 HSE 2015 > D5 HSE 2018 > DS HSE R-Dynamic P300e 2021
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there may be a TSB relating to this, I'll check.....
| 08MY Discovery 3 (history) 
nice one martin
