Member Since: 20 Nov 2011
Location: chicago
Posts: 24
Clunk changing into 1st
hi all
i have a V8 2005 D3 (auto)
ive just noticed a symptom, when i decelerate (with brakes), when im just about stopped, when the car switches into 1st gear, it seems to clunk into 1st. its not huge, but definately noticible.
it also does it when you manually force it into 1st.
any suggestions on what this coule be?
7th Nov 2012 12:25 am
mattgreen
Member Since: 15 Sep 2009
Location: Worksop
Posts: 211
Is the clunk accompanied by physical movement of the vehicle like it's trying to move (against the brakes)?
Does it do it every time or is it only in certain situations?
I notice a slight clunk & movement when in low range and moving between Low 1, 2 or 3. I've always assumed this was just free play in the drive train being taken up by when selecting very hi-torque gears. I could be wrong so I'll give it a bit more consideration next time I'm out in the D3.
7th Nov 2012 11:51 am
maplecottage
Member Since: 01 Feb 2011
Location: Norfolk
Posts: 3171
Common fault - IMO 3 things need doing, all need a FaultMate or similar.
1. Update the autobox software with the 'Bump Fix' patch
2. Recalibrate the Transfer Box
3. Reset the gearbox adaptations.
7th Nov 2012 12:20 pm
Jimjamm
Member Since: 20 Nov 2011
Location: chicago
Posts: 24
thanks very much!
very helpful.
is this something my local mechanic will be aware of? the 'bump fix?"
the indy i use has auto logic. will he be right do you think?
7th Nov 2012 11:11 pm
aljo
Member Since: 20 May 2007
Location: west sussex
Posts: 804
maplecottage wrote:
Common fault - IMO 3 things need doing, all need a FaultMate or similar.
1. Update the autobox software with the 'Bump Fix' patch
2. Recalibrate the Transfer Box
3. Reset the gearbox adaptations.
I've tried the bump fix etc but throws up errors ! Is this bump fix only for a certain year model ? I have a 07 hse autoLast night I lay in bed looking up at the stars in the sky and I thought to myself, where,s the f**king ceiling!!
8th Nov 2012 7:40 am
patrickD3
Member Since: 25 Dec 2011
Location: Cape Town
Posts: 22
Has the clunk always been there and you just started noticing it or has it got worse?
I have the clunk too. Been told it's normal for a small clunk. I've done a gearbox flush to fix a slight shudder and the clunk is still there. Have it on my list to do the transmission software flash.
What confuses me is that it seems to have got worse over the last year. Then how can it be a software issue Unless it's the adaptations that are causing it Or I'm just paying more attention to it
8th Nov 2012 9:05 am
aljo
Member Since: 20 May 2007
Location: west sussex
Posts: 804
My clunk is every now and then , have always had a slight vibration felt through the steering wheel and body around 1500rpm ,have previously reflashed the gearbox and transfer box and gearbox is smooth as silk and no vibration ! But always seems to go back to vibration after approx 40 miles ? Last night I lay in bed looking up at the stars in the sky and I thought to myself, where,s the f**king ceiling!!
8th Nov 2012 10:00 am
maplecottage
Member Since: 01 Feb 2011
Location: Norfolk
Posts: 3171
ATF overheat can be the cause if it gives vibes after running a few miles. There are a couple of posts on here but can't think of who the author was just now
8th Nov 2012 7:04 pm
maplecottage
Member Since: 01 Feb 2011
Location: Norfolk
Posts: 3171
Bump fix patch needs the accompanying base software to be at the correct version - it doesn't work with all releases. IIRC there are 2 versions - you need to use the one matched to your current software.
8th Nov 2012 7:06 pm
aljo
Member Since: 20 May 2007
Location: west sussex
Posts: 804
maplecottage wrote:
ATF overheat can be the cause if it gives vibes after running a few miles. There are a couple of posts on here but can't think of who the author was just now
It vibrates when cold so can rule the atf overheat out , It does feels slightly smoother after approx 30 odd miles though , but as i said previously after a gearbox and transfer box reflash the vibration dissapears for about 30 odd miles
Quote:
Bump fix patch needs the accompanying base software to be at the correct version - it doesn't work with all releases. IIRC there are 2 versions - you need to use the one matched to your current software.
I only have the one bump fix in my faultmate files ! you say there should be 2 ?
Im not convinced the right software has been put on the car for my gearbox , how would i find out what was on the car originally Last night I lay in bed looking up at the stars in the sky and I thought to myself, where,s the f**king ceiling!!
8th Nov 2012 7:18 pm
Jimjamm
Member Since: 20 Nov 2011
Location: chicago
Posts: 24
I have been trying to fix this problem to no avil.
I had the software upgraded which apparently included the bump fix patch, cleared adaptions and reset transfer.
Still have the problem. The mechanic said it could be a result of big tires which I put on every now and then to go off road.
Can someone plz help. Wanna get this sorted and my mechanic doesn't seem to have the answer.
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Unless it's the adaptations that are causing it 
Or I'm just paying more attention to it 
