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#1
20th March 2010, 09:24 PM
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Lost all drive
My S8 had been parked up for 13 or so days without starting the engine, then I went on a 500 mile round trip journey. Today started the car, and was driving down the Fosse way. Came to a roundabout and started to speed up again. The revs suddenly went to 7k and the speed didn't increase. It was like I was pressing the accelerator in neutral. Happened again a few times then PRND432 all lit up in red, and the car went into limp mode. It struggled to drive down my girlfriends driveway and then I turned it off, started the car again, put it in D to drive forward and a big thud and the cars rolled back slightly, all box lights on again. Didn't have my Vag Com on me so can't test. I'm waiting for AVP to open on Monday so I can sort something out with Ben or get him to come out then get it flat bedded to him to see if its something simple such as a drive shaft/maf. He's the only person whos judgement I really trust. Fingers crossed but doubt its a maf, drive shaft is possible. I have an AA warranty which covers me upto £500 which should help out, just a bit.
Could someone point out my options for me please? Comments will be very much appreciated. 
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2009 Audi RS 6 Saloon V10 - 420mm Ceramics, Keyless, Soft Close, Adaptive Cruise, Glass Sunroof, Blinds, Twin Pane & UV, Freeview & DAB, High Beam Assist, MTM bits, Audi Exclusive Bits, MRC, Milltek, GYEF1 ASY2's, Bluetooth streaming music to AMI mod - 753 PS/1021 NM 2016 Audi S3 Saloon, Sepang, S-Tronic - B&O, Tech Pack etc... Company Car 1995 Audi A8 4.2 V8 quattro Sport - Bose, Solar, Blinds 
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#2
20th March 2010, 09:27 PM
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I don't like the sound of this Amar, as it could be the dreaded transmission....
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Present: S4 B8 avant, fully loaded, MRC Stage2, Milltek non-res, KW springs Past: S8 D2 FL, S2 ABY coupe, RS6 C5 saloon, RS4 B7 saloon, S4 B5 saloon, S4 B6 avant, all gone but not forgotten 
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#3
20th March 2010, 09:33 PM
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Yep Clive, I think it is but I did have an A8 that lost all drive and it was a driveshaft. What happened in that was it just went bam, a lot of noise and no drive, it revved loads in D similair to this without going anywhere. Its strange but even if one driveshaft goes the whole car doesn't move. Being a quattro I thought I'd still have 3 wheel drive
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2009 Audi RS 6 Saloon V10 - 420mm Ceramics, Keyless, Soft Close, Adaptive Cruise, Glass Sunroof, Blinds, Twin Pane & UV, Freeview & DAB, High Beam Assist, MTM bits, Audi Exclusive Bits, MRC, Milltek, GYEF1 ASY2's, Bluetooth streaming music to AMI mod - 753 PS/1021 NM 2016 Audi S3 Saloon, Sepang, S-Tronic - B&O, Tech Pack etc... Company Car 1995 Audi A8 4.2 V8 quattro Sport - Bose, Solar, Blinds
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#4
20th March 2010, 09:41 PM
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Drive shaft going shouldnt cause the gearbox lights to light up - Thats coming from the TCU, which in turn is either a TCU or a gearbox problem.
The big thuds might be the box slamming itself into 3rd gear (limp mode) which is 'normal' when something isnt right, if that makes sense... Vagcom wont tell you a great deal either as the gearbox is one big dumb lump of metal with only 2 sensors on it from memory, so as soon as the output shaft isnt spinning at the speed it should be for the speed of the input shaft, it kind of gets upset and goes into limp mode... Thats my basic understanding anyway. This could happen if it fails to select the correct gear which could be anything from low fluid through to a failed clutch assembly... Im sad to say, but it doesnt sound like a simple fix this one, but I would be happy to be proven wrong....
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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 783537The Daily Town Car - 2023 Tesla Model Y Performance. Black with Black. Giant ipad screen, huge sunroof, 4 wheel drive, Tow bar, lots of ooomph and made in China, so actually built properly unlike the Californian ones. The Family Wagon - 2018 Tesla Model X. Black, 7 Seats, Towbar, Homelink, Enhanced Auto pilot with Summon and self park, Heated front seats, CCS Charger upgrade, MCU2 Upgrade, Falconwing Doors, Self opening / closing doors, Netflix, Spotify, toys, Air suspension, alcantara roof + lots of other stuff...... The 17 year old Driver Wagon 2015 Skoda Citigo Monte Carlo. Alloys, Power steering, Aircon, Leccy windows, Sat Nav, bluetooth, central locking, cup holders, 59 whole bhp. Million times better than my first car. Well jealous..... 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, 2006 Q7 4.2 FSi Black, 2012 Q7 Sline+ 4.2Tdi White, 2008 Blue Audi S8 Everything Else 1989 Subaru Justy, 1986 Vauxhall Cartlton 2.0 GL, 1985 Vauxhall Carlton 2.2 CDi, 1987 Ford Sierra XR4x4, 1983 Vauxhall Senator, 1985 Vauxhall Senator 3.0i, 1997 Polo Saloon, 1997 Peugeot 306 1.9 TDi, Ford Sierra Sapphire 2000E, 1990 Subaru Justy, 2000 Subaru Impreza, 2000 Subaru Impreza RB5, 1993 Range Rover LSE, 2005 VW Bora, 2003 Skoda Superb, 2003 VW Passat V6 4 Motion, 1996 Peugeot 106, 2000 Range Rover 4.0, 2019 Tesla Model 3 Performance
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#5
20th March 2010, 09:47 PM
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Thanks for your thoughts Ian, I agree with everything you have said. I think it only really makes sense to go for a reconditioned gearbox, or a low miler one if I can find it, would you know what type/part number I need Ian so I can search on Ebay.de. A manual conversion could be nice, will have to see what Ben thinks...
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2009 Audi RS 6 Saloon V10 - 420mm Ceramics, Keyless, Soft Close, Adaptive Cruise, Glass Sunroof, Blinds, Twin Pane & UV, Freeview & DAB, High Beam Assist, MTM bits, Audi Exclusive Bits, MRC, Milltek, GYEF1 ASY2's, Bluetooth streaming music to AMI mod - 753 PS/1021 NM 2016 Audi S3 Saloon, Sepang, S-Tronic - B&O, Tech Pack etc... Company Car 1995 Audi A8 4.2 V8 quattro Sport - Bose, Solar, Blinds
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#6
21st March 2010, 09:01 AM
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Does it still pick up reverse? That would rule out the driveshaft.
From memory, there are a number of 'clutch basket' failures on QuattroWorld which sound like similar symptoms - TozoM8 is your gearbox man, might be worth getting his opinion. From the sounds of it, he's been in more '8 gearboxes than I've had hot dinners and he's converted his to manual.
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#7
21st March 2010, 10:50 AM
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Thanks Psyche, I am speaking with Tozo already. He reckons its the clutch which is a 220 Euro part from Audi, but its inside the gearbox so it will need to come out for a rebuild... I was able to select reverse so yeah its probably the clutch. I will have to see what Ben thinks on Monday/Tuesday and will keep all updated.
Lets hope its a TCU, never heard of a TCU failing though? But I hear there a ten min job to swap over. Would the TCU show up on VAG COM? 
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2009 Audi RS 6 Saloon V10 - 420mm Ceramics, Keyless, Soft Close, Adaptive Cruise, Glass Sunroof, Blinds, Twin Pane & UV, Freeview & DAB, High Beam Assist, MTM bits, Audi Exclusive Bits, MRC, Milltek, GYEF1 ASY2's, Bluetooth streaming music to AMI mod - 753 PS/1021 NM 2016 Audi S3 Saloon, Sepang, S-Tronic - B&O, Tech Pack etc... Company Car 1995 Audi A8 4.2 V8 quattro Sport - Bose, Solar, Blinds Last edited by Singh; 21st March 2010 at 11:10 AM.
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#8
21st March 2010, 11:07 AM
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Hope it's an easy fix Amar, but if not don't forgot the guys at Chester Autos, they know these boxes inside out
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Present: S4 B8 avant, fully loaded, MRC Stage2, Milltek non-res, KW springs Past: S8 D2 FL, S2 ABY coupe, RS6 C5 saloon, RS4 B7 saloon, S4 B5 saloon, S4 B6 avant, all gone but not forgotten
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#10
21st March 2010, 11:17 AM
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Well when I tested the reverse gear, the drive gear was working too. Its only after I started it again after I had parked it up for 15 or so mins it didn't go forward but then again it is a very steep drive, I didn't test reverse for the second time after it had been parked up. It may still work in Drive actually but when I heard the thud I got scared and turned it off.
I reckon if I disconnect the battery for a while that will take it out of limp mode, but limp mode is there for a reason I suppose. The cars 12 miles away so I can't go out and test again.
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2009 Audi RS 6 Saloon V10 - 420mm Ceramics, Keyless, Soft Close, Adaptive Cruise, Glass Sunroof, Blinds, Twin Pane & UV, Freeview & DAB, High Beam Assist, MTM bits, Audi Exclusive Bits, MRC, Milltek, GYEF1 ASY2's, Bluetooth streaming music to AMI mod - 753 PS/1021 NM 2016 Audi S3 Saloon, Sepang, S-Tronic - B&O, Tech Pack etc... Company Car 1995 Audi A8 4.2 V8 quattro Sport - Bose, Solar, Blinds
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Linear Mode
