Gearbox question
Gearbox question
Hello RS6 experts,
Has anybody had the following C5 RS6 gearbox issue? No doubt the local audi garage will just want to replace the whole gearbox, but I'm curious as to what could be wrong before I approach them...
When putting the car into gear for the first time after engine startup, one of two things happens occasionally:
1) The gearbox goes into fail mode, where I'm restricted to one gear and the indicator on the dash lights up all the gear symbols.
2) The car won't change out of first gear when moving forward, although there is no error indication on the dash.
In both cases, turning the engine off and on again restores things to normal.
Any ideas?
Has anybody had the following C5 RS6 gearbox issue? No doubt the local audi garage will just want to replace the whole gearbox, but I'm curious as to what could be wrong before I approach them...
When putting the car into gear for the first time after engine startup, one of two things happens occasionally:
1) The gearbox goes into fail mode, where I'm restricted to one gear and the indicator on the dash lights up all the gear symbols.
2) The car won't change out of first gear when moving forward, although there is no error indication on the dash.
In both cases, turning the engine off and on again restores things to normal.
Any ideas?
Re: Gearbox question
Sounds more like a problem with the F125.
Vagcom will help you diagnose.
http://www.audipages.com/Tech_Articles/ ... place.html
Vagcom will help you diagnose.
http://www.audipages.com/Tech_Articles/ ... place.html
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
Re: Gearbox question
Great info! Thanks!
That it could be something outside the gearbox is promising indeed. I'm sure it will be awkward to get at though.
Right, just need to get hold of Vagcom.
That it could be something outside the gearbox is promising indeed. I'm sure it will be awkward to get at though.

Right, just need to get hold of Vagcom.
Re: Gearbox question
If it's not that, it could be a problem with your gear selector lever. Again, all this can easily be tested with the Vagcom.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
Re: Gearbox question
Thanks again.
To be honest, the last time I used Vagcom a few years ago, I couldn't make much sense of it. With a new gearbox at stake, this time I'll be reading the instructions.
To be honest, the last time I used Vagcom a few years ago, I couldn't make much sense of it. With a new gearbox at stake, this time I'll be reading the instructions.

Re: Gearbox question
It's peasy easy. I'll walk you through it.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
Re: Gearbox question
DRC has to be the most tragic choice for a username on the C5 RS forum... I'd consider changing your username to "Coilover", don't forget to renew your topmounts while you're at it.
No matter where you go, there you are.
Re: Gearbox question
bam_bam wrote:DRC has to be the most tragic choice for a username on the C5 RS forum... I'd consider changing your username to "Coilover", don't forget to renew your topmounts while you're at it.

Daytona Grey (C5) RS6 saloon, but just a little better...
**** SOLD!!!
****
KW V3 suspension
390mm C6 Brakes
Hotchkis ARBs
Viper Tuning (537bhp 604lbft)
Unit 20 TCU remap
Milltek non-res exhaust and downpipes
100 cell sport cats
Aero wipers
Winter wheels
Wagner intercoolers
LED interior lights
Tesla Model S 85D
All the options with the exception of stupid air suspension
Tesla Model X 60D
Silly doors and all!
**** SOLD!!!

KW V3 suspension
390mm C6 Brakes
Hotchkis ARBs
Viper Tuning (537bhp 604lbft)
Unit 20 TCU remap
Milltek non-res exhaust and downpipes
100 cell sport cats
Aero wipers
Winter wheels
Wagner intercoolers
LED interior lights
Tesla Model S 85D
All the options with the exception of stupid air suspension
Tesla Model X 60D
Silly doors and all!
Re: Gearbox question
Well, I couldn't think of a better username at the time, so went for irony.
I had my DRC swapped out with PSS9s back in 2007.
I had my DRC swapped out with PSS9s back in 2007.
Re: Gearbox question
The f125 is a little harder on the rs6 as the down pipe is in the way , It also has a new ' D ' Shape connector on it ..
Unit 20
0151 3366888
The northwest's only dedicated 'RS' repair centre.

http://www.facebook.com/pages/unit-20/104343529619713
0151 3366888
The northwest's only dedicated 'RS' repair centre.

http://www.facebook.com/pages/unit-20/104343529619713
Re: Gearbox question
There you have it then, you might as well gut your cats while you're at it 

Last edited by Shoppinit on Fri Oct 07, 2011 8:43 pm, edited 1 time in total.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
Re: Gearbox question
I believe I've already got one.....
Re: Gearbox question
Go on -bam_bam wrote:DRC has to be the most tragic choice for a username on the C5 RS forum... I'd consider changing your username to "Coilover", don't forget to renew your topmounts while you're at it.
Change your nickname to "Torque converter reliability" just for a laugh!
______________________________________________________
C7 A6 allroad 3.0TDi.
Tiguan 2.0TDi R-line
C7 A6 allroad 3.0TDi.
Tiguan 2.0TDi R-line
Re: Gearbox question
Well, got home, got a Vagcom, connected it up and voila:
1 Fault Found:
17090 - Transmission Range Sensor (F125): Implausible Signal
P0706 - 35-10 - - - Intermittent
Seems I need to replace the F125 with something that sends a more plausible signal.
...anyway, better than replacing the gearbox.
1 Fault Found:
17090 - Transmission Range Sensor (F125): Implausible Signal
P0706 - 35-10 - - - Intermittent
Seems I need to replace the F125 with something that sends a more plausible signal.
...anyway, better than replacing the gearbox.

Re: Gearbox question
That boys goodShoppinit wrote:Sounds more like a problem with the F125.
Vagcom will help you diagnose.
http://www.audipages.com/Tech_Articles/ ... place.html

Avus Avant, RNS-E mk2 with sds and Bluetooth, Milltek, Hotchkis, Bilstein, Forge, ITG, A.C.E, Wagner, FBMFSW, MTM.
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