May try shoving a 6HP26A into the car...

[nitrorocket]

It appears the transmissions from the eight series will not fit. Looks like it needs to be from a Phaeton or a newer rs6.

This whole wondering can all be resolved when I get a wearing schematic, I think I'm just going to go buy one. I will answer most questions.

[hahnmgh63]

That is true, but the version that came in the "Euro only RS6 2008-2010" was never sold in N. America. You would have to import that version from Europe. It is a stronger version than what is used in the U.S. A8, etc... Not 100% sure about the N. America S6 though, anyone know which version of the 6HP26A that is? May be a stronger version than what was available in the A8. Keep in mind ours is a different version of the 5HP24A than what was in the A6, A8, S6, etc...
I'm not trying to shoot the idea down, I would love to have the 6sp auto box in my car. You are probably on the close track of looking into the Phaeton version due to the front diff. But the best choice would probably need to be the Phaeton W12 version which I would bet is a stronger box than the Phaeton 4.2 which in N. America I don't think came with the the 6HP26A, just the 6HP19A.

[nitrorocket]

Unless there is a separate rebuild kit for the euro version, it would have the same power holding capabilities ans internal parts will interchange. A 6hp should be a 6hp across the board minus case differences for different chassis.

[nitrorocket]

Here is an application chart.

[TozoM8]

I'm glad you chimed in on this, as I remember talking to you about this a couple years ago.

Do you know what kind of transmission is pictured strapped to the jack?

Also do you have any leads on any S8s with bad transmissions?

The trans on the jack is a 6HP19 out of a 4.2 Phaeton. The D3 A8 also has the 6HP19.
Unfortunatelly the D2 got old so people junking them.
The 6HP26 is way stronger than the 5HP24. The Aston Martin DB9 has it and it holds up with that V12 with no problems.

[hahnmgh63]

http://www.apra-europe.org/dateien/d...chatronics.pdf
Well, maybe Tozo can pipe in. I'm just saying their are different versions within the range of TQ rating. Trying dropping in a 5HP24 out of an A6 in our car. The Tq converter alone in the RS6 is about 1" larger diameter, the Audi RS6 study guide says:
The following modifications have been
made to the previous transmission:
• Reinforced transfer gear and
transmission housings
• Increased clutch pressure
• Brake “D” reinforced (one additional
coated disc)
• Reinforced spur gear drive splines
(modified material)
But it is still called the 5HP24A

[nitrorocket]

If the phaeton did not come with a 6hp26, lets find me one that will fit. What cars in us came with one then? Hmmm

[nitrorocket]

I need to figure out what 6hp26's came in that are attainable.

[hahnmgh63]

According to http://www.europeantransmissions.com...audi.htm#S4/S6 which is probably not gospel but may be. The 2004+ W12 A8's came with the 6HP32. funny that with the later V10's they swapped to the Aisin TR60SN gearbox. Same as the Porsche Cayenen/VW Touareg. Could the Differential have a different placement between the W12 version compared to the V10 version compared to the 4.2 version?

[SteveKen]

The 6hp26a also came in the 2008-2010 RS6. That made plenty of power!

http://www.ebay.de/itm/Automatik-Get...item5afa93675f

$7200 plus shipping makes for an expensive experiment.

Unfortunatelly the D2 got old so people junking them.

This makes me sad. Aluminum scrap must pay pretty well for these, too. I'm going to keep looking though...

[hahnmgh63]

From Wiki:
6HP26A[edit]
Four-wheel drive version used in Audi, Volkswagen Passenger Cars and Bentley marques of the Volkswagen Group:

2002–present Volkswagen Phaeton (Typ 3D)
2003–2009 Audi A8 (D3, Typ 4E)
2003–present Bentley Continental GT
2005–present Bentley Continental Flying Spur
2006–present Audi S6 (C6, Typ 4F)
2008–2010 Audi RS6 (C6, Typ 4F)

[hahnmgh63]

It would be an expensive test but that one, 6HP26A-61 is also used in the Euro 4.2TDI which is a TQ monster 480lb-ft, so it could probably handle the TQ. The V12 DB9 puts out some HP but only 420lb-ft of TQ.

[mik15]

i don't think it was the 6hp26, it is part of the 6hp family but not the 26, i have the 6hp26 on the 750Li, and if you check the BMW forum you'll see how many gearboxes have failed, while on the uk RS forum there are only maybe 2 or 3 that have had issues with the gearboxes on their C6 RS6...

[nitrorocket]

There could be a very good chance though that failures are due to the tuning on the TCU. To the Chevrolet six speed 6l80/90e, The shift dwell times and solenoid line pressures are very critical for the transmissions to last. If the tuning is a little off, you can go through transmission very fast. Wonderful stew to the tuning between those two cars.

[nitrorocket]

Also, maybe the lack of issues with the new rs6 are because the owners dont drive them as much and that there are so very few sold comparably??

[nitrorocket]

Realistically, the bell housing doesn't even have to fit the motor, I could cut off the bell housing and weld on a donor bell housing. Lol

[hahnmgh63]

There are a lot of issues on the VW forums with the both the 5sp (5HP25) & 6sp (6HP19/6HP26) in the Phaetons but you don't here about an overwhelming amount of failures in the A8, although the A8 is listed with a curb weight about 800#'s less, and were another 100# less than that.

[hahnmgh63]

Tozo, I just put my girlfriends '05 A8L on the lift and the casting in the side of the transmission say's 6HP26. Do the non "L" A8 D3's only have the 6HP19? Her car is a 4.2 and not a W12.