S6 - DSG to ZF8 Swap?

[Orch]

Anyone know if this has been done and how much work is involved? Been having a load of issues so pondering whether this is a potential fix for improved reliability?


Sent from my iPhone using Audizine

[WatchMeSpend]

Anyone know if this has been done and how much work is involved? Been having a load of issues so pondering whether this is a potential fix for improved reliability?


Sent from my iPhone using Audizine

I DON"T know if this has been done, but AFAIK in most cars the engine programming is different depending on transmission.

[fastboatster]

I DON"T know if this has been done, but AFAIK in most cars the engine programming is different depending on transmission.

Usually not the case with VW/Audi cars, all the software is usually identical however coding is different for auto an manuals. Given that rs6 had a zf8, chances are zf8 should work with 4.0tt in the s6 given that trans connector is repinned and component protection is updated. I was musing about doing the same dl501 to zf8 swap in my s4, however I decided not to spend anymore money on that junker than necessary and just get a car I want instead of presumably more "reliable" s4. S6 with 4.0tt however deserves some like this done to it, its good to have this engine and not worry about the junktronic transmission issues.
P.S. I started to think about zf8 in the s4 because a6 3.0t came with dl501 instead of zf8 outside the NAR, so these 2 transmissions are fairly interchangeable.

[Valpo A7]

Is the bell housing bolt pattern the same? The engine to trans connection shafts might be off as well.

[fastboatster]

Is the bell housing bolt pattern the same? The engine to trans connection shafts might be off as well.

Are you talking about 3.0t? Let me put it this way - the flange plate in the back of the engine where it's bolted up is the same part for CCBA with DSG and a bunch of other Audi engines including 2.0t, 3.2 and 3.0t. That plate has holes to accommodate several different transmissions, I saw that some holes were not used with dsg when I dropped mine. So no, bolt patterns for dsg and zf 8 are most likely not identical, but all the holes are there and dowel pins just might need to be moved to different positions. What's more, flex plate is also the same across at least 3.0t engines.

[Valpo A7]

If all the hardware on the back of the engine will line up properly to the trans bell housing with minimal problems then that is a huge step forward in getting it done. Now it’s all software which a good tuner can probably help with. A good driveline shop can fabricate a driveshaft if it’s needed to modify the connection from the DSG trans to the ZF driveshaft. The flange might be different or the shaft length might need altered. That’s just cutting, welding, and a quick balancing.

But being the A and the S are the same basic platform the trans length and driveshaft length might be right to begin with. You might need the shifter guts for the connection to the DSG. Just tossing things out here to think about. They might be perfectly compatible to begin with and it’s really just a plug and play tuning effort needed.

[Orch]

Thanks guys, lots to think about here. Would love to find someone that’s done it to get the full low down


Sent from my iPhone using Audizine

[fastboatster]

If all the hardware on the back of the engine will line up properly to the trans bell housing with minimal problems then that is a huge step forward in getting it done. Now it’s all software which a good tuner can probably help with. A good driveline shop can fabricate a driveshaft if it’s needed to modify the connection from the DSG trans to the ZF driveshaft. The flange might be different or the shaft length might need altered. That’s just cutting, welding, and a quick balancing.

But being the A and the S are the same basic platform the trans length and driveshaft length might be right to begin with. You might need the shifter guts for the connection to the DSG. Just tossing things out here to think about. They might be perfectly compatible to begin with and it’s really just a plug and play tuning effort needed.

I probably should have done this when my selector lever sensor went out and I had a shop replacing it. this idea occurred to me when I dropped it to replace the dual mass flywheel, front dsg clutch cover which I didn't tell the shop to do when they did the sensor. So now that is fixed and I'm ready to jump the Audi ship, i'm probably not gonna bother dropping the trans again and putting the zf8 in the car. Unless somebody drops an s4 with broken trans at my doorstep and tells me it's now mine, I won't be looking for any broken s4s either. Too mucho dinero and trouble with these cars for not much more performance than something with n54 or n55.

[A6sport]

And I remember being pissed that Audi didn't offer the DSG on A6/A7 variants in the US. I think I'll take the zero...

[Audisthesia]

And I remember being pissed that Audi didn't offer the DSG on A6/A7 variants in the US. I think I'll take the zero...

Um, what? DSG is the same as S-Tronic. Which my S6 has. In the USA.

[gk1]

And I remember being pissed that Audi didn't offer the DSG on A6/A7 variants in the US. I think I'll take the zero...

Um, what? DSG is the same as S-Tronic. Which my S6 has. In the USA.

I believe he might be referring specifically to how outside the US the C7 A6 and A7 came with the S-tronic as well.
Funny, now Audi USA reversed it and the C8 A6/A7 are S-tronic while the S6/S7 are ZF(Tiptronic).

[Audibellybutton]

Has anyone ever done this?

It seems like they should be compatible, with ODIS and TCU tuning but I havent seen it done.

It would be great if you could use an A6/A7 ZF8 because used ones are pretty cheap,

If those dont work, the S8 or Rs6 transmission should work as they are also mated to a 4.0t

My transmission is in good condition but I would definitely do a project like this If my clutch goes bad or my transmission ever needs replacing. I know it may be a tricky/expensive job but It could be worth it IMO over changing out a whole new dsg especially if you can use an A6/A7 Zf8

[BoostedDesigns]

just came across this looking as well. more for research than need
2023-01-11_09-20-09.jpg

[Audibellybutton]

just came across this looking as well. more for research than need
2023-01-11_09-20-09.jpg

Hope we get more info on this I would 100% do this if my dsg goes bad

[mambojumbo]

I just did this in my 09 Q5. Went from 1st gen DL501 to ZF8HP55A. You would need the following hardware items to get it done, trans, atf cooling lines, propshaft and rear diff. Best to get the support brackets of the trans and diff as well. Mine didn’t require driveshafts but YMMV. You will need the gear selector assembly as well since the cable connecting to the trans is of different length.

Now the difficult part is repinning + addition of 1 pin in the wiring, component protection and ECU flashing. My initial assumption was that the long coding in the ECU would allow me to swap from 7spDSG to 8sp Stepped transmission. No luck there… had to use Odis to flash the correct software version. Was on IE stage 3 K04 file and IE after sales was stellar in helping me get the right tune after the ECU change. You may need to check your ESP coding if there’s any selection for transmission but in my case this was not required.

To sum up, it was a tough one but DSG was just so problematic, I’d rather just have a ZF8. A plus point is 1800rpms @100kmh is awesome for fuel economy

[baldy]

Not an S6, but a C7 TDi, but this guy has done it.

https://youtu.be/c7JB0_rzn28?si=XsK4Sp4qz0T56MVu

[Audibellybutton]

Has anyone ever done this?

It seems like they should be compatible, with ODIS and TCU tuning but I havent seen it done.

It would be great if you could use an A6/A7 ZF8 because used ones are pretty cheap,

If those dont work, the S8 or Rs6 transmission should work as they are also mated to a 4.0t

My transmission is in good condition but I would definitely do a project like this If my clutch goes bad or my transmission ever needs replacing. I know it may be a tricky/expensive job but It could be worth it IMO over changing out a whole new dsg especially if you can use an A6/A7 Zf8

I am a man of my word.

I am in the midst of this swap right now. I will report back with an overview once its done.

[Burkeomatic]

I don't see why not. As long as the back of the engine is in the same place, which I think they do, it sure looks like it. I have yet to figure out if the 3.0t and 4.0t actually have different variations of the ZF8. Everything seems to contradict, but it looks to me the 3.0t and 4.0t use the same variation.

Theoretically, you should just need to find a 3.0t parts car and swap everything over, which would be a better solution if you have room, as you'd be able to sell off the additional parts and make ok money on the remaining aluminum for scrap.

[Audibellybutton]

I don't see why not. As long as the back of the engine is in the same place, which I think they do, it sure looks like it. I have yet to figure out if the 3.0t and 4.0t actually have different variations of the ZF8. Everything seems to contradict, but it looks to me the 3.0t and 4.0t use the same variation.

Theoretically, you should just need to find a 3.0t parts car and swap everything over, which would be a better solution if you have room, as you'd be able to sell off the additional parts and make ok money on the remaining aluminum for scrap.

Its actually a lot more simple than you might think. Definitely dont need a parts car either. ZF swaps have been done on virtually every car, but one must remember in our scenario, our engine and chassis are both physically compatible with the ZF8 so not much needs to be changed physically. As for coding one must remember all 4.0t have the same ecu MED17.1.1 so of course with some tweaks it is definitely compatible with the ZF8/AL551 without the need of a standalone controller like cantcu or turbolamik which most cars need to be able to run a ZF8

I dont want to spoil too much (or jinx myself) but I will give all the details when I'm done. I also have the parts list for the swap as well.

Another note is that i have found that the RS7,S8,A8, and A6/A7 all use the 8HP55 transmission despite rumors otherwise. They have different trans codes for example an A6 one is NNT whereas an RS7 transmission code is PTT

I have no idea what the difference is between each transmission code, but I imagine not much. Obviously the RS models are rated for more torque? but what exactly is improved if anything? For that I am not sure.


The transmission i'm using is from an A6 so I will see how it holds up. I predict that it will hold up great


Edit: forgot to mention, the RS variant does have different cooler and a diff cooler as well, but i am unsure about any internal differences

[Burkeomatic]

Its actually a lot more simple than you might think. Definitely dont need a parts car either. ZF swaps have been done on virtually every car, but one must remember in our scenario, our engine and chassis are both physically compatible with the ZF8 so not much needs to be changed physically. As for coding one must remember all 4.0t have the same ecu MED17.1.1 so of course with some tweaks it is definitely compatible with the ZF8/AL551 without the need of a standalone controller like cantcu or turbolamik which most cars need to be able to run a ZF8

I dont want to spoil too much (or jinx myself) but I will give all the details when I'm done. I also have the parts list for the swap as well.

Another note is that i have found that the RS7,S8,A8, and A6/A7 all use the 8HP55 transmission despite rumors otherwise. They have different trans codes for example an A6 one is NNT whereas an RS7 transmission code is PTT

I have no idea what the difference is between each transmission code, but I imagine not much. Obviously the RS models are rated for more torque? but what exactly is improved if anything? For that I am not sure.


The transmission i'm using is from an A6 so I will see how it holds up. I predict that it will hold up great


Edit: forgot to mention, the RS variant does have different cooler and a diff cooler as well, but i am unsure about any internal differences

I typed a lot.

TLDR - All of the larger ZF8 cars (A6,A7,A8,RS7) available in the U.S. use some variation of the ZF8 HP55 rated at 479lb/ft of torque. We don't know what the different codes mean. MEE is an A8 4.0t, NCT is an A8 3.0t. and the RS7 has the PTT.


I didn't think you would need a parts car, but it could be nice, and sometimes little stuff like connectors, bolts, and the like will nickel and dime you to death. I was just thinking of the cheapest C7s I've seen and you'd probably be able to snag one for a few grand on copart, what the engines go for and other things like that. You'd also get a back up diff, some extra axles, and maybe some upgrade interior parts for your car.

I just don't like speaking with authority on these things unless I'm absolutely sure, but I'm 90% sure that the A8, C7 3.0T, and RS7 have the same transmission. My A8 has a MEE transmission code, whatever that means. I've read several of the self study guides and tons of info, and it all points to them being the same. There are several different iterations of the ZF8, and it's hard to tell. I also believe the diesel has the beefy box because of it's hi torque output.

But the 3.0t and 4.0t cars no matter what all say HP-55 on them, and if you do some looking on ZF8s, a ZF8 HP55 is 479lbft rated.

This is exactly what my transmission tag says.

https://www.ebay.com/itm/19662821379...3Avlp_homepage



This is the RS7 one.

https://www.ebay.com/itm/13415935978...Bk9SR87Sr7nZZA



So is there something different? Or are RS7 transmissions about $5-6k overpriced?

Interestingly, the wikipedia page doesn't mention the RS7, but mentions the RS6 comes with the HP90.
https://en.wikipedia.org/wiki/ZF_8HP_transmission

It looks like they're the same. Maybe the longevity can be attributed to the tune.

Here's what I am sure of though.

The 3.0t transmission can handle whatever you want to throw at it from that motor.

If you're really, really worried if it can handle the power or not. You can still get an A8 transmission with the MEE code. We know for a fact that will hold 4.0t power reliably with more junk in the trunk. Plenty of folks out there hauling around a 5000lb car with over 750 horsepower.

If it were me, I'd just throw in whatever one I could get for the cheapest and go with that. Actually, if I somehow needed a replacement transmission for my car, I'd buy the $500 one. If I theoretically owned an RS7 and on the outside chance it went out, I'd throw in the $500 3.0T transmission and see what happened. YMMV, these transmissions are reliable enough, I don't think we'll need to worry about it.

Edit: that's super cool about the TCU, would it be easier to reflash the one in your car, or get the one from the donor car and have that coded to your car. Like, I wonder if the firmware is different.

[Shane Horning]

One thing I've found is there are different torque converters for the hp55. Also another difference is some versions have that accumulator inside for auto stop start cars. Those differences may be what the codes mean. However you can use a trans from auto stop start in a car without it. I installed a c7 3.0 xf8 into a b8 a4 and everything seemed the same However It has a different stall converter, i now can't boost brake as high

Sent from my SM-S921U using Audizine Forum mobile app

[Audibellybutton]

I typed a lot.

TLDR - All of the larger ZF8 cars (A6,A7,A8,RS7) available in the U.S. use some variation of the ZF8 HP55 rated at 479lb/ft of torque. We don't know what the different codes mean. MEE is an A8 4.0t, NCT is an A8 3.0t. and the RS7 has the PTT.


I didn't think you would need a parts car, but it could be nice, and sometimes little stuff like connectors, bolts, and the like will nickel and dime you to death. I was just thinking of the cheapest C7s I've seen and you'd probably be able to snag one for a few grand on copart, what the engines go for and other things like that. You'd also get a back up diff, some extra axles, and maybe some upgrade interior parts for your car.

I just don't like speaking with authority on these things unless I'm absolutely sure, but I'm 90% sure that the A8, C7 3.0T, and RS7 have the same transmission. My A8 has a MEE transmission code, whatever that means. I've read several of the self study guides and tons of info, and it all points to them being the same. There are several different iterations of the ZF8, and it's hard to tell. I also believe the diesel has the beefy box because of it's hi torque output.

But the 3.0t and 4.0t cars no matter what all say HP-55 on them, and if you do some looking on ZF8s, a ZF8 HP55 is 479lbft rated.

This is exactly what my transmission tag says.

https://www.ebay.com/itm/19662821379...3Avlp_homepage



This is the RS7 one.

https://www.ebay.com/itm/13415935978...Bk9SR87Sr7nZZA



So is there something different? Or are RS7 transmissions about $5-6k overpriced?

Interestingly, the wikipedia page doesn't mention the RS7, but mentions the RS6 comes with the HP90.
https://en.wikipedia.org/wiki/ZF_8HP_transmission

It looks like they're the same. Maybe the longevity can be attributed to the tune.

Here's what I am sure of though.

The 3.0t transmission can handle whatever you want to throw at it from that motor.

If you're really, really worried if it can handle the power or not. You can still get an A8 transmission with the MEE code. We know for a fact that will hold 4.0t power reliably with more junk in the trunk. Plenty of folks out there hauling around a 5000lb car with over 750 horsepower.

If it were me, I'd just throw in whatever one I could get for the cheapest and go with that. Actually, if I somehow needed a replacement transmission for my car, I'd buy the $500 one. If I theoretically owned an RS7 and on the outside chance it went out, I'd throw in the $500 3.0T transmission and see what happened. YMMV, these transmissions are reliable enough, I don't think we'll need to worry about it.

Edit: that's super cool about the TCU, would it be easier to reflash the one in your car, or get the one from the donor car and have that coded to your car. Like, I wonder if the firmware is different.

Wont need a parts car, for me personally the entire swap I will be out around $1200 ish, theres not many parts you need from the A6. One must also remember that majority of C7 parts are cross compatible with each other.


As for the differences, what shane said about the torque converter makes sense. I imagine the difference between the RS models and the other HP55 could be the torque converter



Update: Shane was definitely right the torque converter is different. I pulled an example part number 0BK323573A

it lists A8/S8/RS7 as compatible. These torque converters can be bought used for cheap, so I'm going to buy one of those and see if I can put it on the A6 transmission. I dont see why not. Great budget RS trans if so

[Burkeomatic]

One thing I've found is there are different torque converters for the hp55. Also another difference is some versions have that accumulator inside for auto stop start cars. Those differences may be what the codes mean. However you can use a trans from auto stop start in a car without it. I installed a c7 3.0 xf8 into a b8 a4 and everything seemed the same However It has a different stall converter, i now can't boost brake as high

Sent from my SM-S921U using Audizine Forum mobile app

That makes a whole lot of sense, like a ton. I also agree about the C7 3.0t torque converter being extra lame. It absolutely blows my mind that we're making all of this power with a transmission rated for 479lb/ft. But I suppose the tuning probably also makes up for a lot. I'm sure most if not all tunes increase line pressure (probably not the Audi specific correct term, but the pressure that holds the clutches closed) like a shift kit would in, say an Allison 6 speed, which is the last transmission I put a shift kit in. Heck, I bet Audi may do something like that in the RS7 and the S8s. So between that and I think we mostly all agree that this transmission is underrated or has a massive margin of safety built in, that's why we can wring every last lb/ft out of it hauling these lard cars around and they stand up.

Wont need a parts car, for me personally the entire swap I will be out around $1200 ish, theres not many parts you need from the A6. One must also remember that majority of C7 parts are cross compatible with each other.


As for the differences, what shane said about the torque converter makes sense. I imagine the difference between the RS models and the other HP55 could be the torque converter

Absolutely. I bet that's right. I really just want to have a parts car and to live vicariously through other people, but I live in a neighborhood where a 60' wide lot is the "premium" lot, may as well be townhouses so that's why I'm pushing it. Or I want to relive my lemons glory days. $1200, that's less than an upgraded clutch pack for an hard to kill low maintenance transmission. What a deal! To be honest, I probably wouldn't buy a parts car either. Kind of makes me want to get an S6 and try it, but the next C7 I get will be diesel.

[Audibellybutton]

That makes a whole lot of sense, like a ton. I also agree about the C7 3.0t torque converter being extra lame. It absolutely blows my mind that we're making all of this power with a transmission rated for 479lb/ft. But I suppose the tuning probably also makes up for a lot. I'm sure most if not all tunes increase line pressure (probably not the Audi specific correct term, but the pressure that holds the clutches closed) like a shift kit would in, say an Allison 6 speed, which is the last transmission I put a shift kit in. Heck, I bet Audi may do something like that in the RS7 and the S8s. So between that and I think we mostly all agree that this transmission is underrated or has a massive margin of safety built in, that's why we can wring every last lb/ft out of it hauling these lard cars around and they stand up.



Absolutely. I bet that's right. I really just want to have a parts car and to live vicariously through other people, but I live in a neighborhood where a 60' wide lot is the "premium" lot, may as well be townhouses so that's why I'm pushing it. Or I want to relive my lemons glory days. $1200, that's less than an upgraded clutch pack for an hard to kill low maintenance transmission. What a deal! To be honest, I probably wouldn't buy a parts car either. Kind of makes me want to get an S6 and try it, but the next C7 I get will be diesel.

exactly, the a6 hp55 rating is so low. ZF is known for massively underrating transmission tq lmits but still

Ill be adding a used torque converter from Rs7/A8/S8 since the transmission is out already, why not. Should be a nice upgrade. But other than that I think the A6/A7 transmission will hold up just fine. On the DSG once you get over a certain power level the DSG starts acting up although it should be able to handle more. But i wont go too deep on that tangent. Ill share all my thoughts once I get the swap finished.

but yeah definitely cheaper than a clutch upgrade. And i see so many people upgrading clutches and still destroying the DSG so its like whats the point. the clutch itself is not the main issue. DSG is a great transmission its just massively misunderstood. But i digress..

[Shane Horning]

exactly, the a6 hp55 rating is so low. ZF is known for massively underrating transmission tq lmits but still

Ill be adding a used torque converter from Rs7/A8/S8 since the transmission is out already, why not. Should be a nice upgrade. But other than that I think the A6/A7 transmission will hold up just fine. On the DSG once you get over a certain power level the DSG starts acting up although it should be able to handle more. But i wont go too deep on that tangent. Ill share all my thoughts once I get the swap finished.

but yeah definitely cheaper than a clutch upgrade. And i see so many people upgrading clutches and still destroying the DSG so its like whats the point. the clutch itself is not the main issue. DSG is a great transmission its just massively misunderstood. But i digress..

Good idea on the torque converter

Sent from my SM-S921U using Audizine Forum mobile app

[Audibellybutton]

Good idea on the torque converter

Sent from my SM-S921U using Audizine Forum mobile app

Thanks! you educated me just in time

[NorthernGTI]

Funny, now Audi USA reversed it and the C8 A6/A7 are S-tronic while the S6/S7 are ZF(Tiptronic).

Not sure about the C8 but the S6/S7 are DSG in Canada. Id assume the same for USA.

813garage(on instagram) is currently doing a ZF trans swap in his big turbo S6. I think he ran into a software issue though. Might be worthwhile to send him a msg and see where hes at with it.

[RLCree]

Man, I'm very curious as to the source on your ZF info. EVERYTHING I had found pointed to the RS cars running the HP90.

ETA..... Well I'll be damned.

https://avtgr.ru/upload/iblock/f91/x...ansmission.pdf

[devo321]

There’s a guy on instagram, eight one three garage, who appears to have done the swap. Might be worth while to get in contact with him for some tips on how to do it

Ps
(His account is the numbers not them spelled out. I can’t put them in the post without it turning into a bunch of emoji code for some reason)

[Burkeomatic]

Man, I'm very curious as to the source on your ZF info. EVERYTHING I had found pointed to the RS cars running the HP90.

ETA..... Well I'll be damned.

https://avtgr.ru/upload/iblock/f91/x...ansmission.pdf

Good find, that would have saved me the research on ebay....lol.

I'm saving that for later, I'm sure the conversation will come up again. Looks like the only ones that got the big boy transmission is the newer S8 and the V8 diesels. Essentially unobtanium, only required for those really swinging for the fences. Not that I keep up with them that much, but even the 1000 hp guys are keeping the HP55 together.

So people asking $7k for an RS7 transmission are just doing so because it came out of an RS7. Go laugh in their face. On that note, i wonder what the difference in the V8 torque converters are. Shane made it sound like they were more alike than different.

These transmissions are dirt cheap out of the other cars for a reason, it's because they don't break, and there isn't considerable demand.

This is good stuff guys, soon there will be an army of diet rs7s and rs6 sedans running around.

Now let's figure out a cheap way to get the low compression rs7/s8 motors (not gonna happen).

[NorthernGTI]

There’s a guy on instagram, eight one three garage, who appears to have done the swap. Might be worth while to get in contact with him for some tips on how to do it

Ps
(His account is the numbers not them spelled out. I can’t put them in the post without it turning into a bunch of emoji code for some reason)

+
Noticed that earlier. Didnt quiet know what to reply to it.

[RLCree]

Good find, that would have saved me the research on ebay....lol.

I'm saving that for later, I'm sure the conversation will come up again. Looks like the only ones that got the big boy transmission is the newer S8 and the V8 diesels. Essentially unobtanium, only required for those really swinging for the fences. Not that I keep up with them that much, but even the 1000 hp guys are keeping the HP55 together.

So people asking $7k for an RS7 transmission are just doing so because it came out of an RS7. Go laugh in their face. On that note, i wonder what the difference in the V8 torque converters are. Shane made it sound like they were more alike than different.

These transmissions are dirt cheap out of the other cars for a reason, it's because they don't break, and there isn't considerable demand.

This is good stuff guys, soon there will be an army of diet rs7s and rs6 sedans running around.

Now let's figure out a cheap way to get the low compression rs7/s8 motors (not gonna happen).

I bet the converters boil down to stall and clutch differences. Size and shape should be the same, minus possibly bolt pattern.

[Audibellybutton]

Man, I'm very curious as to the source on your ZF info. EVERYTHING I had found pointed to the RS cars running the HP90.

ETA..... Well I'll be damned.

https://avtgr.ru/upload/iblock/f91/x...ansmission.pdf

I dont blame you, ive been told the same thing and always thought that, even heard rumors it was a 70 but every single one ive seen is hp55

a compatible hp90 we could use would be the bentley HP90

[Audibellybutton]

There’s a guy on instagram, eight one three garage, who appears to have done the swap. Might be worth while to get in contact with him for some tips on how to do it

Ps
(His account is the numbers not them spelled out. I can’t put them in the post without it turning into a bunch of emoji code for some reason)

Hes a friend of mine, I am doing what I can to help him and he has helped me a lot on the prep and stuff. As for coding we are pretty sure we have it figured out thanks to the advice of others who did similar swaps. But he is waiting on someone to help him flash the tcu side. In my case I am purchasing the tools to do it myself. Once i get it all done I can confirm what did or did not work. There are several different approaches I am going for the simplest one if that makes sense. But if i run into any issues I will use the more complex way

[Burkeomatic]

One thing I've found is there are different torque converters for the hp55. Also another difference is some versions have that accumulator inside for auto stop start cars. Those differences may be what the codes mean. However you can use a trans from auto stop start in a car without it. I installed a c7 3.0 xf8 into a b8 a4 and everything seemed the same However It has a different stall converter, i now can't boost brake as high

Sent from my SM-S921U using Audizine Forum mobile app

I dont blame you, ive been told the same thing and always thought that, even heard rumors it was a 70 but every single one ive seen is hp55

a compatible hp90 we could use in the same way with the same coding process would be the bentley HP90

Well, I don't think it's necessary.

Well, maybe for you since your car's probably a rocket ship with your over compensator turbos.

I had read both ways. I forget what self study I was reading, or maybe it was my build sheet. I was fairly convinced my A8 had a different trans than my A7 did, but I came to realization that it didn't. So then I started looking at the transmission tags, and ebay was the best place. I've found others. Although, if you want to turn a profit, you could buy 3.0t zf8s for $500-1000 and sell them as RS7 transmissions on ebay for $5k. I wonder if the ones where you can't see the transmission tags are like that.

[Audibellybutton]

Well, I don't think it's necessary.

Well, maybe for you since your car's probably a rocket ship with your over compensator turbos.

I had read both ways. I forget what self study I was reading, or maybe it was my build sheet. I was fairly convinced my A8 had a different trans than my A7 did, but I came to realization that it didn't. So then I started looking at the transmission tags, and ebay was the best place. I've found others. Although, if you want to turn a profit, you could buy 3.0t zf8s for $500-1000 and sell them as RS7 transmissions on ebay for $5k. I wonder if the ones where you can't see the transmission tags are like that.

Yeah I'm not that fast yet. I will try to beat this transmission to death, if it dies, swapping in an HP90 is cheaper and more worth it than building the 55

[viper04]

Like to see the out come of this. Keep us posted.

[NorthernGTI]

Hes a friend of mine, I am doing what I can to help him and he has helped me a lot on the prep and stuff. As for coding we are pretty sure we have it figured out thanks to the advice of others who did similar swaps. But he is waiting on someone to help him flash the tcu side. In my case I am purchasing the tools to do it myself. Once i get it all done I can confirm what did or did not work. There are several different approaches I am going for the simplest one if that makes sense. But if i run into any issues I will use the more complex way

Saw him post on Instagram that he finished the swap and is driving it. Spoke to him briefly. Super nice guy.

Sent from my SM-S916W using Audizine Forum mobile app

[Audisthesia]

813garage zf swapped S6.

[RLCree]

813garage zf swapped S6 is now driving. It's a f*$#!@#g animal.

Sure hope he has a parts list and something of a guide on it. The DSG was the only thing that kept me out of an S6.