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

[nitrorocket]

So, if I can possibly get a little help figuring some things out.

If I can find out a few things that I need to know im gonna pick one up and make the car a 6 speed automatic.

-Will it bolt up: seems yes as the newer version 6 speed manual will and it should have the same bolt pattern as the manual trans as long as its also from a newer 4.2 car.

-Need to know what cars, if any, that will have the same gear ratio so a rear diff swap is not necessary.

-Wiring schematics for both so I can rewire the tcu's.

-Find physical dimensions to see if its anywhere close to even fitting in the trans tunnel.

-Figure out overall length to know if I have to shorten or lengthen the driveshaft.

[hahnmgh63]

The RS6 4.2 block has a different bolt pattern at the back than a normal 4.2 block. That is why the manual conversions took to long to show up, somebody that was smart with a lot of energy (Steve Ken) had to come up with an adapter plate to allow the manual to bolt up. I do hope you can do it though. I already have two track cars and would prefer to leave the RS6 with an Auto if it can be a better one.

[nitrorocket]

I dont think an adaptor is necessary. Looks like a 01e can be bolted up without the adaptor too. All the bolts are definetly not needed and starter seems it will work with a little massaging.

[JSRS6]

http://www.zf.com/media/media/docume...61_Catalog.pdf

[nitrorocket]

Found that too, unfortunately it has absolutely zero useful information. The thing doesn't even show dimensions, final drive ratio, or bolt circle dimensions. Bummer...

[JSRS6]

http://www.ebay.com/itm/like/180585599804?lpid=82

[nitrorocket]

Once I find the TCU wiring schematics, I don't see any reason why should not be able to wire it up to function properly.

[JSRS6]

Do you know what year they fixed the internal leak?

[JSRS6]

Good price...

http://m.ebay.com/itm/121219671378?nav=SEARCH

[kday]

Are you thinking that you will use the 5 speed TCU to activate the valve body of the 6 speed transmission? Or are you hoping that the Motronic ECU will be happy to talk to a newer 6 speed TCU as if it were the original 5 speed TCU? It's certainly not impossible that Audi uses the same protocol between different ECU/TCU generations, but I wouldn't assume. It's more of a software issue than a wiring issue...

[nitrorocket]

I saw that too! We must be on the same trail. Lol

The key would be a good side to side picture of both together. And wiring schematic for the TCU.

I'm guessing if the six speed manual will fit into our cars, so should the automatic.

If you find any information on final driver he shows, let me know, I need to know if it will feasibly even work without swapping differential. :/

[nitrorocket]

Im planning on wiring in the newer tcu, ditching the old one. I need to see the wiring schematics, my hope is that it's mainly decision based off of the input sensors from the speed sensor and engine speed/ tps.

[kday]

Im planning on wiring in the newer tcu, ditching the old one. I need to see the wiring schematics, my hope is that it's mainly decision based off of the input sensors from the speed sensor and engine speed/ tps.

Unfortunately I think you are going to be disappointed here. The TCU is a computer and it's operated by software. You aren't going to be able to "rewire" a newer TCU to talk to an older ECU. There's a (remote) possibility that it will just work, but if so it will be because the software in the newer TCU talks the same "language" over the CAN bus as the older one does.

Edit to expand on this: the TCU, which operates the valve body, doesn't have a direct connection to the throttle position sensor and some other sensors it needs to operate. It receives messages over the internal computer network (the powertrain CAN bus) which are produced by the Motronic ECU, and these messages contain the throttle position (or, more likely, something like a torque request value which is the output of the "model" the ECU builds of what the driver wants to do). The TCU also sends messages back to the ECU and other modules like the ABS computer. This is why just replacing the automatic transmission with a manual box results in a check engine light and disabled ABS -- the other computers in the car are expecting the TCU to send certain messages and they go into fault mode if the messages don't arrive.

[JSRS6]

Sounds reasonable.

[nitrorocket]

I guess I have to wait till I get a wiring schematic, but my hopes are that if it sees an engine RPM signal, a speed signal, and a GPS signal, it might function correctly...

[nitrorocket]

Obviously, if I cannot figure out the wiring, or the gear ratio, the potential project would be dead. Oh those are the important things I need to find right now

[mrdave]

Obviously, if I cannot figure out the wiring, or the gear ratio, the potential project would be dead. Oh those are the important things I need to find right now

Contact this guy about the TCU, he's super knowledgeable about that stuff: http://www.audizine.com/forum/member...243-ddillenger or http://nefariousmotorsports.com/foru...profile;u=4744

[nitrorocket]

The other option would be to run a Ford transmission control module for the 6hp they run in the newer Ford's, American cars are generally much simpler, and usually seem to run the transmission control modules more independent and just need some input from the throttle position sensor engine speed and vehicle speed.