I'm looking for any help on information regarding the C5 Gearbox service. I have recently contacted my Audi parts department asking them for the price for a gearbox service kit including oil only to be told their workshop have stated the gearbox is sealed for life and they can't or won't supply a service kit? I replied stating that this is contrary to all the information I have read on the C5 gearbox that states regular servicing is essential so I am waiting to see if they reply? I also want to replace the gearbox wiring loom as I have an intermittent fault that I believe is due to a faulty connection so as I am servicing gearbox I want to replace the wiring loom at the same time. However, Audi tell me that they no longer supply the wiring loom surprisingly so I am looking for help with this as well please.
Part number and supplier of a gearbox service kit for the C5, how much oil do I require, rough idea on price?
I assume it is ZF who originally manufactured / supplied the wiring loom so does anyone know the ZF part number and a ZF supplier that I can contact or anyone else who can supply a wiring loom?
Thanks in advance for any help anyone can give me.
Gearbox Service
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RS6Rottweiler
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Re: Gearbox Service
Ha. Reminds me of me when I was trying to get Audi to service my gearbox many years ago. Bunch of muppets. The lazy / incompetent stealers say it can't be done, the slightly more amenable ones will do it. There's no technical reason why they can't do it. It's all there in their workshop manuals. The procedure is all timed out for them for billing and everything. Just probably not enough value-added for them. It will actually take them the amount of time they charge for the operation. 
Anyway, rant off. The gearbox service is one of the easier jobs on the RS6. It's just intimidating if you haven't done it before. Once you do it you'll wonder what the fuss was about. At least if you do it yourself you won't be wondering whether they put the right amount of ATF in or whether they put the right strainer on.
I struggle to believe that the loom is NLA. There must be absolutely loads of 5HP24(a) boxes around.The ZF part number appears to be 1058 227 020.
There was a thread recently where someone got some bits from a ZF reseller. Maybe call ZF and ask them who distributes for them in Scotland.
Anyway, rant off. The gearbox service is one of the easier jobs on the RS6. It's just intimidating if you haven't done it before. Once you do it you'll wonder what the fuss was about. At least if you do it yourself you won't be wondering whether they put the right amount of ATF in or whether they put the right strainer on.
I struggle to believe that the loom is NLA. There must be absolutely loads of 5HP24(a) boxes around.The ZF part number appears to be 1058 227 020.
There was a thread recently where someone got some bits from a ZF reseller. Maybe call ZF and ask them who distributes for them in Scotland.
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 Service
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."
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RS6Rottweiler
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Re: Gearbox Service
I challenged Audi Perth on this today and they came back with price for parts to service gearbox and this was the response:
The gearbox oil and plug would cost £184.68. If you were to change the oil strainer you would also have a cost of
£87.84.
The 5 speed automatic gearbox wiring harness is no longer available from
AUDI AS WAS DROPPED 01/02/2019 without replacement.
regards
Doesn't make sense to me that Audi would drop this part and only just recently when there are as one of you guys stated loads of this gearbox still in service. The only option will be to contact ZF and see who distributes there parts and see if I can get a hold of one. I know TPS is a distributor of Audi OEM parts so will give them a shout on Monday, thanks for the ZF part number that will be handy, I am assuming I will get the service kit and ATF cheaper as well somewhere.
Has anyone changed the oil out on the Diffs as they are supposed to be sealed for life as well but as the cars are getting on a bit now I was considering doing these while I am doing the gearbox, is it easy enough do?
The gearbox oil and plug would cost £184.68. If you were to change the oil strainer you would also have a cost of
£87.84.
The 5 speed automatic gearbox wiring harness is no longer available from
AUDI AS WAS DROPPED 01/02/2019 without replacement.
regards
Doesn't make sense to me that Audi would drop this part and only just recently when there are as one of you guys stated loads of this gearbox still in service. The only option will be to contact ZF and see who distributes there parts and see if I can get a hold of one. I know TPS is a distributor of Audi OEM parts so will give them a shout on Monday, thanks for the ZF part number that will be handy, I am assuming I will get the service kit and ATF cheaper as well somewhere.
Has anyone changed the oil out on the Diffs as they are supposed to be sealed for life as well but as the cars are getting on a bit now I was considering doing these while I am doing the gearbox, is it easy enough do?
Re: Gearbox Service
Yeah, the diffs are easy enough, too. You will need a big syringe to refill them. None of it is "sealed for life". It's just that Audi don't specify a service schedule for them because they know they will be out of warranty when they fail. Other manufacturers, eg. BMW, who use the exact same parts specify a service schedule.
TPS will probably give you the same story as Audi since they are owned by VW.
Let us know how you get on with TPS and ZF.
Don't forget that the RS6 has a specific strainer with a short pick-up pipe.
What makes you think you have a problem with the harness? The harness is very simple. The only part that tends to fail is the temperature sensor.
I wonder if the 5HP24 harness is the same. It has a different part number (1058 227 019) but they look identical. It's worth asking ZF if it's the same part. If so you can just get one from BMW, Jaguar, Land Rover, etc.
TPS will probably give you the same story as Audi since they are owned by VW.
Let us know how you get on with TPS and ZF.
Don't forget that the RS6 has a specific strainer with a short pick-up pipe.
What makes you think you have a problem with the harness? The harness is very simple. The only part that tends to fail is the temperature sensor.
I wonder if the 5HP24 harness is the same. It has a different part number (1058 227 019) but they look identical. It's worth asking ZF if it's the same part. If so you can just get one from BMW, Jaguar, Land Rover, etc.
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."
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RS6Rottweiler
- 2nd Gear
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- Joined: Tue Sep 03, 2013 11:02 am
- Location: Kirkcaldy, Fife
Re: Gearbox Service
The fault code I have coming up is: 18243 - Pressure Control Valve 5 (N233) Short to Plus P1835
I replaced the F125 switch that has made a difference but not cured the problem. Basically what I have now is when I start up first thing I get all the gear selector lights lit up and gearbox goes into limp mode. I drive for a short distance, stop, select neutral and stop /start engine and I get Drive lit up only. I find that this is worse when the weather is cooler / wet and when the battery voltage is lower so I suspect that I have a bad connection somewhere on the logic that when the battery is fully charged and weather is hotter the problem is greatly improved basically it doesn't happen so often. I had the TCU checked out but they told me it was all okay and connectors were fine but have since found out that they company I used were not to be trusted so I am going recheck the TCU to ensure connectors are fine so that's my reason for wanting to replace the wiring loom rightly or wrongly. Also as the loom sits in the oil there is a possibility that the wires can become brittle with age so it won't do any harm to change it out.
Do you know what grade oil the ATF is for the Gearbox and Diffs. The reason I ask is that I put Amsoil 5W 40 in the engine, I saw a really interesting video on You Tube with a guy testing lots of different oils using a motor with a 2mm rod rubbing against the rotating shaft but being lubricated by the oil and after a period of time he would measure the wear on the rod based on how well the oil lubricated the rod and the Amsoil was by far the best with minimal wear and is a fully synthetic oil so I was looking to see if Amsoil do an ATF and oil for the Diffs as I would use that and see how it goes, not cheap though.
Thanks for the information on the strainer short pick-up pipe, and the part numbers for the loom, i'll keep that in mind when I order. TPS should be able to supply gear box bits but I suspect you are right about them not being able to supply the wiring loom so i'll speak to ZF and see what they say and who can supply, would be something if you have to goto BMW for a part for an Audi, not good and poor that Audi don't support certain parts for older models!
I replaced the F125 switch that has made a difference but not cured the problem. Basically what I have now is when I start up first thing I get all the gear selector lights lit up and gearbox goes into limp mode. I drive for a short distance, stop, select neutral and stop /start engine and I get Drive lit up only. I find that this is worse when the weather is cooler / wet and when the battery voltage is lower so I suspect that I have a bad connection somewhere on the logic that when the battery is fully charged and weather is hotter the problem is greatly improved basically it doesn't happen so often. I had the TCU checked out but they told me it was all okay and connectors were fine but have since found out that they company I used were not to be trusted so I am going recheck the TCU to ensure connectors are fine so that's my reason for wanting to replace the wiring loom rightly or wrongly. Also as the loom sits in the oil there is a possibility that the wires can become brittle with age so it won't do any harm to change it out.
Do you know what grade oil the ATF is for the Gearbox and Diffs. The reason I ask is that I put Amsoil 5W 40 in the engine, I saw a really interesting video on You Tube with a guy testing lots of different oils using a motor with a 2mm rod rubbing against the rotating shaft but being lubricated by the oil and after a period of time he would measure the wear on the rod based on how well the oil lubricated the rod and the Amsoil was by far the best with minimal wear and is a fully synthetic oil so I was looking to see if Amsoil do an ATF and oil for the Diffs as I would use that and see how it goes, not cheap though.
Thanks for the information on the strainer short pick-up pipe, and the part numbers for the loom, i'll keep that in mind when I order. TPS should be able to supply gear box bits but I suspect you are right about them not being able to supply the wiring loom so i'll speak to ZF and see what they say and who can supply, would be something if you have to goto BMW for a part for an Audi, not good and poor that Audi don't support certain parts for older models!
Re: Gearbox Service
I’d suspect the TCU first. Anyone local you can swap with to do a test?
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 Service
I had this for years on mine - it was worst when the car was parked with nose lower than rear, and when it was misty/damp. My box was serviced regularly so I'm sure it was simply an electrical gremlin.Basically what I have now is when I start up first thing I get all the gear selector lights lit up and gearbox goes into limp mode. I drive for a short distance, stop, select neutral and stop /start engine and I get Drive lit up only. I find that this is worse when the weather is cooler / wet and when the battery voltage is lower so I suspect that I have a bad connection somewhere on the logic that when the battery is fully charged and weather is hotter the problem is greatly improved basically it doesn't happen so often.
I just lived with it and got used to a restart at 1 mile when it occured - after all, you're not going to floor it in the first mile anyway!
I put it down to one of the "features" of owning the Beast!
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RS6Rottweiler
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Re: Gearbox Service
I have lived with it for years but I would like to get to the bottom of what is causing this as its always good for other members who might come across the same problem. There was a guy on this forum who was going to replace his loom and get the gearbox serviced by ZF over in Germany but he never fed back how he got on and hasn't replied to my PM's so unfortunately we have lost out on a lot of good information from that.
The TCU was sent away twice, first time they sent it back saying nothing was wrong with it but garage thought they hadn't touched as no evidence of it being looked at so sent back and same outcome but at least they thought it had been opened up and looked at? They said there was some slight corrosion on connections but they were okay so going to definitely get that rechecked as could be the problem.
I'm not sure if there is anyone with a C5 RS6 local who would be willing to trial swap the TCU with me and see if fault goes away, would certainly be up for that for a few beer tokens?
The TCU was sent away twice, first time they sent it back saying nothing was wrong with it but garage thought they hadn't touched as no evidence of it being looked at so sent back and same outcome but at least they thought it had been opened up and looked at? They said there was some slight corrosion on connections but they were okay so going to definitely get that rechecked as could be the problem.
I'm not sure if there is anyone with a C5 RS6 local who would be willing to trial swap the TCU with me and see if fault goes away, would certainly be up for that for a few beer tokens?
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Human Joist
- 3rd Gear
- Posts: 487
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Re: Gearbox Service
Are their any guides for dif and gearbox oil changes ? Had a quick look and can’t find any
Re: Gearbox Service
This gives a good idea of what’s involved in an atf change. It’s actually easier on an RS6 (who’d a thunk) because you don’t have to modify any tools. Also using the Vag Com for monitoring the temperature makes it easier. http://www.audipages.com/Tech_Articles/ ... icing.html
It’s pretty easy.
For the diffs, there’s nothing special to do. Drain and fill in the usual way. Get a copy of elsawin for the exact procedures.
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."
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RS6Rottweiler
- 2nd Gear
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- Joined: Tue Sep 03, 2013 11:02 am
- Location: Kirkcaldy, Fife
Re: Gearbox Service
Cheers for the link that will help greatly, I have Elsawin but as I use Apple struggling to get it to work properly with Windows on Spoke device?
I have also been in touch with ZF regarding wiring loom etc but they have asked me to supply transmission part number and serial number from the gearbox plate. I haven’t looked but is this easily accessible or will the car have to go on a lift to get to it? Hope someone can help me with this so I can respond to ZF.
I have also been in touch with ZF regarding wiring loom etc but they have asked me to supply transmission part number and serial number from the gearbox plate. I haven’t looked but is this easily accessible or will the car have to go on a lift to get to it? Hope someone can help me with this so I can respond to ZF.
Re: Gearbox Service
Busy with this job today my local audi spares guy messed up the order so still waiting for the ATF but otherwise the job has been really simple. Hardest part probably putting the car on axle stands... I was pleasantly surprised with no metal on the magnets and the oil looking relatively good.
Re: Gearbox Service
I got at ZF service kit from Autodoc for £100. They sell two so you may need to contact them to get the right one. They used my vin number to check. Hope this helps.
Kully
Kully
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RS6Rottweiler
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Re: Gearbox Service
ZF responded and advise the the type plate is located on the nearside of the transmission at the rear. It is accessible from under the car although I might have remove some under trays if they are fitted that far back, anybody know?
So either I have to get the car on a ramp and lifted to get the information or I wonder if as Kully mentions if Audi would have the gearbox type and serial number from the VIN number, might be worth a phone call to ask or does anybody know if they can?
So either I have to get the car on a ramp and lifted to get the information or I wonder if as Kully mentions if Audi would have the gearbox type and serial number from the VIN number, might be worth a phone call to ask or does anybody know if they can?
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