A8 Parts Forum  

Go Back   A8 Parts Forum > A8 D4 > D4 - Transmission

D4 - Transmission Gearboxes, diffs, drive shafts.

Reply
 
Thread Tools Display Modes
  #1  
Old 14th August 2016, 06:45 PM
damtom85 damtom85 is offline
Member
 
Join Date: May 2015
Posts: 35
Default D4 owners, feedback about transmission needed

hi

I'm wondering if any of you noticed any issues with transmission when engine cold. I find gear changes quite rough while engine is still cold. When it reaches normal working temperature it gets smooth. l know that when transmission oil is cold it can cause higher friction. I have 8hp55a gearbox in my car and I found thread on BMW forum regarding 8hp55(letter 'a' in 8HP55a indicates use only for Audi as it has quattro feature). BMW owners have the same views about that gearbox, harsh when cold.

what are your view about this?
__________________
Audi A8 D4 4H 2012 3.0tdi Quattro 8spd ZF 8HP55a
Reply With Quote
  #2  
Old 14th August 2016, 07:11 PM
paulrstaylor paulrstaylor is offline
Senior Member
 
Join Date: Jul 2010
Location: Manchester
Posts: 1,161
Default

Not an issue that I have noticed on mine......it does seem to hold gears longer when cold, presumably to aid warm up?
Reply With Quote
  #3  
Old 16th August 2016, 07:18 PM
Joe2.0E Joe2.0E is offline
Senior Member
 
Join Date: Feb 2012
Location: Ireland
Posts: 410
Default

My 2011 3.0TDI can be quite rough when cold, most noticeable when selecting reverse. I have had the ATF changed and it didnt make any difference.
By comparison my old 6 speed D3 was smoother when cold but nothing as "Clever" in terms of seamless/fast changes you get on the D4.
Reply With Quote
  #4  
Old 16th August 2016, 08:24 PM
tonupkid's Avatar
tonupkid tonupkid is offline
Senior Member
 
Join Date: Feb 2009
Location: Inhabiting a house in a village, rural with lots of lovely roads
Posts: 2,006
Default

If its a DSG box, there's your answer.
__________________
A journey of a thousand+ (epic) miles, begins with a single step, (to the door of an 8). Lau Tzu
Reply With Quote
  #5  
Old 16th August 2016, 08:52 PM
paulrstaylor paulrstaylor is offline
Senior Member
 
Join Date: Jul 2010
Location: Manchester
Posts: 1,161
Default

Quote:
Originally Posted by tonupkid View Post
If its a DSG box, there's your answer.
It isn't a DSG box.
Reply With Quote
  #6  
Old 18th August 2016, 05:36 PM
pete-p's Avatar
pete-p pete-p is offline
Senior Member
 
Join Date: Feb 2016
Location: Bristol
Posts: 506
Default

The 2014 3.0tdi I'm using at the moment is perfectly smooth when cold, same as when warm.
__________________
Cars...
'93 Audi Coupe 2.0 Alpine White (sold)
'99 Audi S4 Merlin Purple - K04 upgrade to 412hp (sold)
'00 Audi S8 Agate Grey

Reply With Quote
  #7  
Old 19th August 2016, 11:43 AM
IT's Avatar
IT IT is offline
Administrator
 
Join Date: Jan 2009
Location: Harrogate, North Yorkshire
Posts: 5,942
Default

Mines silky smooth, if it didn't have the gear numbers on the dash I probably would have to keep a close eye on the revs to see changes, not that the revs ever build up to much....
__________________
For parts enquiries and Forum User Administration please contact customer services directly, not me - enquiry@a8parts.co.uk, www.a8parts.co.uk, or call 01642 783537

The Family Wagon - 2012 Q7 4.2 Tdi Sline +. White, Titanium 21" wheels, Black styling pack, Tinted pan roof, Carbon inlays, Comfort Pack (Keyless, Memory seats, mirrors and steering column), Load Pack (Tow bar, Net partiton, load securing rails, Reversible mat), DAB Radio, Digital TV, Bang and Olufsen, Quad Zone climate, Homelink, Rear blinds, 4 x Heated seats, Twin pane glass, High Beam assist, TPM, 6 comfort seat option with rear center console

The Family Project Wagon - 2006 Q7 4.2 FSi Sline. Black. Full leather, Tech Pack (Sat Nav, MMI High, CD Changer, Audi Parking System plus, Auto Boot, Colour DIS), Load Pack (Tow bar, Securing Rails, Luggage Mat, Net Partition), Phone Prep Low, Bose, DAB, TV Tuner, Front seat memory, Seat heating x 4, Side Assist, Auto Dim mirrors, Double Glazing, Privacy Glass, Rear Side Airbags, Xenon Plus, Electric Steering column, Folding tables, Panoramic Sunroof, Running Boards, Alcantara Headlining, Quad Zone, Leather armrests

Daily 2019 Tesla Model 3, Midnight Silver Metallic, Full Performance with AWD and Long Range

Standard Kit (In Audi Speak): Quattro, PDC with Reversing camera, (Completely) Keyless entry/start, Electric memory seats Steering wheel and Mirrors with easy entry, Adaptive Cruise Control, Traffic Jam Assist, D3 Bose Equivalent Audio (imo), Fixed Panoramic sunroof, Auto dim heated memory folding dipping mirrors, Hi beam assist, LED headlights, 20" Alloys, Coming home lights, Auxiliary heating (and cooling), remote boot release (front and back), DAB radio, side assist, lane assist, heated seats x 5, dual zone climate control, tyre pressure monitoring, red brake calipers

Buy yours here and get us both 1000 free supercharger miles: Tesla.com

Octopus Energy. Use the Agile tariff for seriously cheap overnight EV charging, or other things.... At times, the cost goes negative - and you get paid to fill up ! Sign up with this link and we get 50 each


The First 20 Audis:

2001 D2 4.2 QS Silver, 1997 D2 S8 Silver, 1999 D2 4.2 Silver, 2002 D2 S8 Dolphin Grey,
2003 C5 RS6 Blue, 1998 D2 S8 Black, 2000 D2 4.2 QS/S8 Ming Blue, 2003 D3 4.2 Ming Blue,
2005 B7 S4 Blue, 2006 D3 3.0 Tdi Black, 1999 D2 4.2 Silver, 2003 D3 4.2 LPG Crystal Blue,
2000 D2 S8 Silver, 2007 3.0 Tdi Q7 Black, 2009 B8 S4 Black, 1998 D2 S8 Agate Grey,
2006 D3 4.2 Tdi Blue, 2006 D3 S8, 2007 Q7 3.0 Tdi, 2006 C6 S6,

The Second 20 Audis:

2011 A7 Sline, 2001 A2 1.4 Tdi Black, 2002 A2 1.4 Tdi Silver, 2006 A8 4.2 Tdi Blue,
2007 4.2 Tdi Q7, 2006 S4 Cab Silver, 2010 RS6 Saloon Black , 2007 TT Roadster,
2010 A8 D4 4.2 Silver, 2006 C6 A6 2.7 Tdi Quattro, 2000 D2 4.2 QS/S8 Ming Blue (again), 2008 Q7 4.2 Black,
2009 C6 RS6 Saloon Daytona Grey, 2001 Fully Loaded A2 Tdi, 2006 Avant S6 Black, 2007 VW Caravelle Exec Black (almost an Audi)
2009 TT Roadster Daytona, 2015 Q7 4.2 tdi lava grey, 2002 GmbH D2 demonstrator, 2006 D3 A8 LWB 4.2 Tdi Black

Most Recent Audis:

2001 A2 1.4 Tdi Black, 2007 4.2 FSi Q7 ABT Blue, 2016 S5 Coupe Launch model, 2004 S4 B6 Cabriolet, 2016 Q7 Sline White
Reply With Quote
  #8  
Old 19th August 2016, 03:24 PM
tonupkid's Avatar
tonupkid tonupkid is offline
Senior Member
 
Join Date: Feb 2009
Location: Inhabiting a house in a village, rural with lots of lovely roads
Posts: 2,006
Default

Quote:
Originally Posted by paulrstaylor View Post
It isn't a DSG box.
So what kind of box is it? Does is pre-select the gears?
__________________
A journey of a thousand+ (epic) miles, begins with a single step, (to the door of an 8). Lau Tzu
Reply With Quote
  #9  
Old 19th August 2016, 06:26 PM
paulrstaylor paulrstaylor is offline
Senior Member
 
Join Date: Jul 2010
Location: Manchester
Posts: 1,161
Default

It's an eight-speed auto, believe it is a ZF-8HP box.

https://en.wikipedia.org/wiki/ZF_8HP_transmission
Reply With Quote
  #10  
Old 19th August 2016, 06:29 PM
paulrstaylor paulrstaylor is offline
Senior Member
 
Join Date: Jul 2010
Location: Manchester
Posts: 1,161
Default

I should add, although it a slush box, it is very intuitive and smooth and never seems to be in the wrong gear of have a pause for kick-down.

Perhaps partly due to the additional ratios over the older 6 speed, but also likely due to the integration with the navigation system, meaning it can change down as you approach a bend for example!?
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 04:19 PM.


Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.