A8 Parts Forum  

Go Back   A8 Parts Forum > A8 D2 > D2 - Transmission

D2 - Transmission Gearboxes, diffs, drive shafts.

Reply
 
Thread Tools Display Modes
  #11  
Old 9th December 2019, 08:49 PM
The_Laird's Avatar
The_Laird The_Laird is offline
Senior Member
 
Join Date: Jun 2009
Location: Redmile: Leics, Notts, Lincs border - near Belvoir Castle
Posts: 5,069
Default

Makes good sense to start with the obvious, Brian. I’ll get that checked - thanks
__________________
2002 Final Edition S8. Ebony black with Silver Grey leather and myrtle wood trim.
Current mods: solar sun roof, 20mm rear spacers, 15 mm on front, red brembo callipers, 6k headlights, rear view camera, engine remap, alloy dash dial rings, alloy navi rings, tt/phaeton pedal upgrade, (and custom matching foot rest) dension ipod interface & parrot hands free kit (both fully hidden), av input, tv in motion switched thro' PF switch in blanking plug right of steering column, Audi 'quattro' sill covers, repositioned centre console switches, radio clock, .
Planned mods: auto-dimming rear view mirror, dash cam (as steamship's), fit the ski hatch, refit philips drl's (or maybe not - nope, definitely not - horrible botch!).
Reply With Quote
  #12  
Old 10th December 2019, 08:29 AM
J i m s t e r J i m s t e r is offline
Senior Member
 
Join Date: Apr 2018
Posts: 141
Default

It could be a combo of the new tyres and road surface. I drove a piece of road regularly which had long indentations worn in it, from having queuing trucks stood on it. On the previous tyres, I'd notice the steering tramline and grab as it encountered these surface dips.

Then I got a deal on some new Pirelli P6000s and first time on this road, I too had to pull over and check there wasn't a bulge or a flat. Something about the tread pattern gave a real "brarrp" and vibration that wasn't present with the previous tyres. But only on tramlne-y surfaces like this.

I've avoided Pirelli since (and they were oem on that car, a 9-5 Aero)
Reply With Quote
  #13  
Old 10th December 2019, 08:52 AM
MikkiJayne MikkiJayne is offline
Senior Member
 
Join Date: Jan 2012
Posts: 5,017
Default

Your rear bushes definitely need doing Jim, but I've personally not seen bad ones behave like this. Usually they give a loose feeling at the rear on cornering and really bad ones make the car quite unsettled on turn-in. Interesting that Mark has experienced something similar though.

A thought - is the problem in specific places? On the way back from Germany last year I had to stop in Belgium to make sure all my wheels were still attached! The odd road surface had set up a very unpleasant resonance in my car because of the specific combination of components in it, whereas the other D2s were all fine. Jimster may be on to something with the road surface if it only happens on some roads.

Now Spannerrash has found aftermarket bushes for the rear arms we can look to get yours done some time in 2020 once I've caught up on my backlog.
Reply With Quote
  #14  
Old 10th December 2019, 10:38 AM
The_Laird's Avatar
The_Laird The_Laird is offline
Senior Member
 
Join Date: Jun 2009
Location: Redmile: Leics, Notts, Lincs border - near Belvoir Castle
Posts: 5,069
Default

I really appreciate the input on this guys! But, no, it’s not on specific stretches of road; there was no issue yesterday on roads where it has ‘wobbled’ or ‘juddered’ or whatever previously. But I’ve also fitted Pirelli P Zeros!

But a date to get the rear subframe done would be great Michaela! Just so long as you’re not going to overdo it again!
__________________
2002 Final Edition S8. Ebony black with Silver Grey leather and myrtle wood trim.
Current mods: solar sun roof, 20mm rear spacers, 15 mm on front, red brembo callipers, 6k headlights, rear view camera, engine remap, alloy dash dial rings, alloy navi rings, tt/phaeton pedal upgrade, (and custom matching foot rest) dension ipod interface & parrot hands free kit (both fully hidden), av input, tv in motion switched thro' PF switch in blanking plug right of steering column, Audi 'quattro' sill covers, repositioned centre console switches, radio clock, .
Planned mods: auto-dimming rear view mirror, dash cam (as steamship's), fit the ski hatch, refit philips drl's (or maybe not - nope, definitely not - horrible botch!).
Reply With Quote
  #15  
Old 10th December 2019, 11:35 AM
tc4332's Avatar
tc4332 tc4332 is offline
Senior Member
 
Join Date: May 2014
Location: Wigan, Greater Manchester, UK
Posts: 2,323
Default

Looks like Jim has mislaid his

  1. Shudders,
  2. Wobbles,
  3. Judders.
Could anyone finding any of these please return them to Jim.
__________________
Ray at Wigan Pier

2014 A8L D4 4.0TFSI Gold (Sticker says "Beige") Can't leave you in a black smoke cloud anymore..
In progress, Nothing left to do.



Gone 2004 A8 D3 3.0 TDI. Ebony Pearl Black (with little bits of other colours and glitter)
Reply With Quote
  #16  
Old 10th December 2019, 01:07 PM
steamship's Avatar
steamship steamship is offline
Senior Member
 
Join Date: Jun 2013
Location: Londonderry, Northern Ireland
Posts: 2,931
Default

Quote:
Originally Posted by tc4332 View Post
Looks like Jim has mislaid his

  1. Shudders,
  2. Wobbles,
  3. Judders.
Could anyone finding any of these please return them to Jim.
With the various terms used already to try and explain Jim's plight, I'm reminded of the scene in Airplane II where they're skimming through Roget's thesaurus looking for new words to describe how the shuttle was behaving.

Hopefully he can sort it out before we all run out of synonyms.
__________________
2001 A8 D2 FL 3.7 Q - LPG Conversion, Engine: AKC, Gearbox:FBB, Colour:LY5X Aqua Blue pearl effect, Interior:WJ light beige/dark beige valcona leather with burr walnut inserts

My DIY jobs - Replaced alarm horn, Replaced Coolant Temp sensor, Updated RNS-D firmware, Installed Reversing Camera and Digital TV, Dashcam Installation, Retrofitted Rear Blinds, Auto-Dimming Rear View Mirror, Chrome Boot Struts

Sold! 2008 S8 D3 5.2 V10 - Engine: BSM, Gearbox:KLW, Colour:LY7F Suzuka Grey Pearl Effect, Interior:Black/Black with Silver/Black valcona leather with carbon atlas inserts, Bang & Olufsen, Heated windscreen, Soft-close doors, TV, DAB, AMI, Quad Zone, Auto Boot, Auto dim Mirrors, Keyless entry, PDC with rearview camera, AFS II Headlights

My DIY jobs - Fan Jet Windscreen Washers, Retrofitted Electric Side Blinds
Reply With Quote
  #17  
Old 10th December 2019, 01:33 PM
The_Laird's Avatar
The_Laird The_Laird is offline
Senior Member
 
Join Date: Jun 2009
Location: Redmile: Leics, Notts, Lincs border - near Belvoir Castle
Posts: 5,069
Default

As some of you, those of a certain age, will understand, shudders, wobbles and judders, as well as shakes and various other unsteady descriptions, are not restricted to our cars!
__________________
2002 Final Edition S8. Ebony black with Silver Grey leather and myrtle wood trim.
Current mods: solar sun roof, 20mm rear spacers, 15 mm on front, red brembo callipers, 6k headlights, rear view camera, engine remap, alloy dash dial rings, alloy navi rings, tt/phaeton pedal upgrade, (and custom matching foot rest) dension ipod interface & parrot hands free kit (both fully hidden), av input, tv in motion switched thro' PF switch in blanking plug right of steering column, Audi 'quattro' sill covers, repositioned centre console switches, radio clock, .
Planned mods: auto-dimming rear view mirror, dash cam (as steamship's), fit the ski hatch, refit philips drl's (or maybe not - nope, definitely not - horrible botch!).
Reply With Quote
  #18  
Old 21st December 2019, 12:57 AM
RRPhil RRPhil is offline
Junior Member
 
Join Date: Nov 2013
Posts: 14
Default

Another possibility (if you have the 5HP24A transmission). The torque converter lock-up clutch is susceptible to wear once the transmission exceeds 100k miles. The LUC was designed without torsional vibration springs/dampers to save on installation length and instead relies on software control at low speeds to allow it to slip at around 3% to absorb torsional vibration. It only locks solid at higher engine speeds where TV isn’t an issue. The total LUC piston movement is only 1mm, so wear in the friction plate means the controlled-slip mode becomes harder for the control system to manage and the result is a vibration at lower engine speeds that sounds a bit like driving over a cattle grid. If you look closely at the rev. counter you can see the engine speed wavering slightly (usually only by a couple of hundred rpm) in sympathy with the noise.

Phil
Reply With Quote
  #19  
Old 21st December 2019, 09:14 PM
briang9's Avatar
briang9 briang9 is offline
Senior Member
 
Join Date: Jan 2011
Location: Scotland
Posts: 2,817
Default

Did you ever get to the bottom of this Jim?
__________________



Audi S8 2002, Black (even the chrome bits)
Audi RS6 Avant 2008, Daytona Grey
Maserati Granturismo 2008, Metallic Nero Carbonio
Audi S8 2015, Daytona Grey
Reply With Quote
  #20  
Old 22nd December 2019, 11:41 AM
The_Laird's Avatar
The_Laird The_Laird is offline
Senior Member
 
Join Date: Jun 2009
Location: Redmile: Leics, Notts, Lincs border - near Belvoir Castle
Posts: 5,069
Default

It’s still happening, and I’ll try to check the rev counter next time it happens. But it happens quite rarely and only for a couple of seconds, so it’s hard to check what else might be going on. Hopefully, I’ll be fit enough in the New Year to start investigating, but I’ve still not slept through the night since the op at the end of September, so I’m permanently knackered!
__________________
2002 Final Edition S8. Ebony black with Silver Grey leather and myrtle wood trim.
Current mods: solar sun roof, 20mm rear spacers, 15 mm on front, red brembo callipers, 6k headlights, rear view camera, engine remap, alloy dash dial rings, alloy navi rings, tt/phaeton pedal upgrade, (and custom matching foot rest) dension ipod interface & parrot hands free kit (both fully hidden), av input, tv in motion switched thro' PF switch in blanking plug right of steering column, Audi 'quattro' sill covers, repositioned centre console switches, radio clock, .
Planned mods: auto-dimming rear view mirror, dash cam (as steamship's), fit the ski hatch, refit philips drl's (or maybe not - nope, definitely not - horrible botch!).
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 08:26 AM.


Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.