So I have no idea what is going on with my 97 A8 Quattro. When I first start the car it isn't in limp mode, but when I put it in drive it doesn't feel like it goes into gear and when I push on the accelerator, as soon as it hits 1200rpm there is a small thud and it goes into limp mode. No matter how quickly or slowly I do this, as soon as it hits 1200rpm it does it. Everytime I turn the car off and back on it will no longer be in limp mode. It doesn't do it in reverse though. I can get the rpm's over 1200 in reverse and it's fine. I just got done replacing the Transmission Range Switch (F125) but I didn't clear the codes yet because I just haven't been able to get it done yet.Would clearing the codes matter? I'm thinking the next thing I'll do is replace the ATF fluid and filter and see what happens. I have no idea what to do after that though. Any help is appreciated.

 

Definately erase the fault codes. Changing the fluid and filter is a very good idea, and try not to drive it too much until that is done.

 

Yea, I'm not driving it at all right now because I don't like the stress the engine is under when starting from a stop in 4th gear. Does anybody know of a good place to get the gaskets and filter for the ATF change other than the dealership?

 

I believe you can get all that stuff at www.ecstuning.com

 

Is five liters of tranny fluid enough for an A8? I just got this kit: http://www.blauparts.com/proddetail....od=F2A1005%2DAand they only supply five liters but say it should be adequate

 

don't waste your money get the codes ( you say its in limp mode before its in gear ) that's an engine fault? what mods have been done? ATF fluid change and filter is a good thing on high mileage

 

I got the codes awhile back:

Original Codes ECU[/b]

Sunday,23,September,2007,20:12:09:01947
VAG-COM Version: Release 704.1

Address 01: Engine
Control Module Part Number: 4D0 907 557 D
Component and/or Version: 4.2L V8/4V MOTR AT D05
Software Coding: 01273
Work Shop Code: WSC 00214
9 Faults Found:

18010 - Power Supply Terminal 30: Voltage too Low
P1602 - 35-10 - - - Intermittent
18098 - Malfunction Indication Light (K83): Electrical Malfunction
P1690 - 35-00 - -
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-10 - - - Intermittent
16685 - Cylinder 1: Misfire Detected
P0301 - 35-10 - - - Intermittent
17546 - Fuel Trim: Bank 2 (Add): System too Lean
P1138 - 35-10 - - - Intermittent
17544 - Fuel Trim: Bank 1 (Add): System too Lean
P1136 - 35-00 - -
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-10 - - - Intermittent
16685 - Cylinder 1: Misfire Detected
P0301 - 35-10 - - - Intermittent
18032 - MIL Request Signal Active (Check TCM for errors too!)
P1624 - 35-00 - -

Readiness: N/A

Original Codes TCM[/b]
[/b]
Sunday,23,September,2007,20:13:33:01947
VAG-COM Version: Release 704.1

Address 02: Auto Trans
Control Module Part Number: 4D0 927 156 K
Component and/or Version: AG5 01L 4.2l4V USA D29
Software Coding: 00002
Work Shop Code: WSC 02314
5 Faults Found:

17090 - Transmission Range Sensor (F125): Implausible Signal
P0706 - 35-10 - - - Intermittent
17114 - Gear Ratio Monitoring: Incorrect Gear Ratio
P0730 - 35-00 - -
17114 - Gear Ratio Monitoring: Incorrect Gear Ratio
P0730 - 35-00 - -
17114 - Gear Ratio Monitoring: Incorrect Gear Ratio
P0730 - 35-00 - -
18169 - Shift Lock Solenoid (N110): Short to Ground
P1761 - 35-10 - - - Intermittent

Recurring ECU Codes:[/b]

Sunday,23,September,2007,20:20:48:01947
VAG-COM Version: Release 704.1

Address 01: Engine
Control Module Part Number: 4D0 907 557 D
Component and/or Version: 4.2L V8/4V MOTR AT D05
Software Coding: 01273
Work Shop Code: WSC 00214
1 Fault Found:

18098 - Malfunction Indication Light (K83): Electrical Malfunction
P1690 - 35-00 - -

Readiness: N/A

This original'sarewhat was pulled and the recurring are what came up after clearing them

 

Oh, and it goes into limp mode only after hitting 1200rpm when in gear, when i first start the car it isn't in limp mode.

 

Hi! I had the same problem with my -97 A8 and since Audi themselves donĀ“t repair the gearboxes, I took it to a garage specializing in Audi, VW, BMW, Mercedes in Tallinn. With my car they had to change some hydraulic valve for 2nd and 3rd gear. The guy said that itĀ“s a usual problem with Tiptronic when they get older. My car mileage is 220000 km.