Gearbox issue.

4.2 V8 40v biturbo - 450 bhp
4.2 V8 40v biturbo - 480 bhp (plus)
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Gav66
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Gearbox issue.

Post by Gav66 » Wed Nov 04, 2020 8:44 pm

So problem with the box, this has been happening more and more since the weather getting cooler.
The gear selector on the dash goes through all drive selected except D, all the rest no problem, you can see the D flickering when trying to select it.
Drives OK in S and manual.
Box was serviced 6k a go.
When I try and move it back into D after manual all go red.
20201104_184150.jpg
So after looking through old posts I'm guessing the first 2 are the harness and the other one is a solenoid.
Anyone know audi part numbers for these ?
Any help very much appreciated.

Ps when you click on the pic it straightens up.

Gav.
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Shoppinit
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Re: Gearbox issue.

Post by Shoppinit » Wed Nov 04, 2020 9:01 pm

I’d start by changing the F125.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
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Jayjay101
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Re: Gearbox issue.

Post by Jayjay101 » Wed Nov 04, 2020 9:33 pm

Shoppinit wrote:I’d start by changing the F125.
What Shop says!-I had something like this that ended up being a bare wire going into the f125 so check the loom


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Shoppinit
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Re: Gearbox issue.

Post by Shoppinit » Wed Nov 04, 2020 9:49 pm

:sekret: Yeah, if you spot a wire out of place just cut it, innit.
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."
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Jayjay101
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Re: Gearbox issue.

Post by Jayjay101 » Wed Nov 04, 2020 10:05 pm

Shoppinit wrote::sekret: Yeah, if you spot a wire out of place just cut it, innit.
I deserve that!ImageImage


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c5 rs6 owner thats been known to cut the wrong wire.............
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Gav66
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Re: Gearbox issue.

Post by Gav66 » Wed Nov 04, 2020 10:31 pm

Thanks lads, just had a look at shopp's write up on this looks like i could try it myself but then again garage would probably do it in a couple of hours...decisions...decisions.
Going to see if I can get the switch fom Audi or are these freely available?
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Gav66
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Re: Gearbox issue.

Post by Gav66 » Wed Nov 04, 2020 10:43 pm

Auto doc £232 ?
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Gav66
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Re: Gearbox issue.

Post by Gav66 » Wed Nov 04, 2020 10:47 pm

Thats for an 8 pin I think ours is 10 ??.
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Jayjay101
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Re: Gearbox issue.

Post by Jayjay101 » Wed Nov 04, 2020 10:48 pm

Gav66 wrote:Thanks lads, just had a look at shopp's write up on this looks like i could try it myself but then again garage would probably do it in a couple of hours...decisions...decisions.
Going to see if I can get the switch fom Audi or are these freely available?
Get it from audi mate it’s about £150 so it’s cheap for a rs6 part


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Gav66
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Re: Gearbox issue.

Post by Gav66 » Thu Nov 05, 2020 12:03 am

Thanks Jay very much appreciated.
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Gav66
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Re: Gearbox issue.

Post by Gav66 » Thu Nov 05, 2020 4:42 pm

So contacted Audi today and was looking for the part 01L919821B which he said was transmission range sensor but also said thats not the F125 switch which is part number 4bz927156fb gearbox control unit.
He described the 01l919821b as a plate with a cable on it which I think is what is the f125 swith could someone clarify this for me pls before I order it.

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Shoppinit
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Re: Gearbox issue.

Post by Shoppinit » Thu Nov 05, 2020 5:05 pm

https://audi.7zap.com/en/rdw/audi+rs6+r ... -927090/#7

Number 7
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."
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Shoppinit
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Re: Gearbox issue.

Post by Shoppinit » Thu Nov 05, 2020 5:06 pm

Shock horror Audi dealer doesn’t know anything about Audis.
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."
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Gav66
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Re: Gearbox issue.

Post by Gav66 » Thu Nov 05, 2020 5:07 pm

Screenshot_20201105-153115_Samsung Internet.jpg
Is this the f125 switch ? No 12 ?
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Gav66
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Re: Gearbox issue.

Post by Gav66 » Thu Nov 05, 2020 5:11 pm

Good so they have that in stock for £215
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