TH400 in A8

[Marc W]

“Crappy relay diagram”. Haha. Here’s mine…. Maybe it will help 😂

 

[Unholy707]

“Crappy relay diagram”. Haha. Here’s mine…. Maybe it will help 😂 View attachment 103948

This is some great info to share!

 

[Unholy707]

“Crappy relay diagram”. Haha. Here’s mine…. Maybe it will help 😂 View attachment 103948

Is that the starter relay or an in-line relay?

 

[Marc W]

Hell I don’t know lol. You can see the BCM brake lamp output is being used for the starter. So the car won’t start without a foot on the brake. Obviously there’s more going on there than just that but automotive wiring isn’t my thing. This is what AJ sent when asked for a diagram.

 

[GNBRETT]

Anyone run a 4l80 in a hellcat yet? Just wondering what would control it in auto. Is there a stand alone for the trans?

 

[Unholy707]

Anyone run a 4l80 in a hellcat yet? Just wondering what would control it in auto. Is there a stand alone for the trans?

I believe literally 1 person does, either that or it’s a 4l60e. not worth it

 

[Blown7]

Anyone run a 4l80 in a hellcat yet? Just wondering what would control it in auto. Is there a stand alone for the trans?

This is what I use
https://www.jegs.com/p/TCI/TCI-EZ-T...xBVFoK7tszZQ3E0eNRdozeIaQ8zgethhoCt9sQAvD_BwE

 

[GNBRETT]

Sweet bro! What do u have it installed in? Do u have a Holly as well?

This is what I use
https://www.jegs.com/p/TCI/TCI-EZ-T...xBVFoK7tszZQ3E0eNRdozeIaQ8zgethhoCt9sQAvD_BwE

 

[ostmike]

Hey guys, has anyone put a TH400 in an A8 car and kept everything working? I know this can be done with the manuals relatively easily. @ostmike ?

For some reason I did not get notified on this tag. I just happened to open this thread and saw I was tagged and decided to give a late reply. If I am reading this correctly it looks like you have figured the solution out. For future reference we do offer this swap service in-house only. We have performed this swap on A8 and M6 vehicles up to the 2019 model year. We do swap the RF Hub and keep them in stock for these swaps. I would be curious to see how you are doing the swap without changing the RF Hub.

 

[Unholy707]

For some reason I did not get notified on this tag. I just happened to open this thread and saw I was tagged and decided to give a late reply. If I am reading this correctly it looks like you have figured the solution out. For future reference we do offer this swap service in-house only. We have performed this swap on A8 and M6 vehicles up to the 2019 model year. We do swap the RF Hub and keep them in stock for these swaps. I would be curious to see how you are doing the swap without changing the RF Hub.

My way probably isn’t cost effective for a big shop, but it guarantees the car can be replaced back to stock easily and everything works like factory with zero lights. My car is an A8 with the RF hub from an m6 (my entire car was an m6). Everything works like stock, I even have paddle shifters. Only thing that I don’t have is the remote start. All I had to do was replace wiring, reconfigure BCM, and have PCM flashed from m6 to a8 os. The m6 cars works out of the box pretty much with the TH400. When I did it, my rf hub read the config from the bcm - did not need to touch the RF hub. So, if you wanted to do the TH400 swap on an A8 - you’d replace headlamp to dash harness, engine harness, flash pcm, config bcm, neutral saftey to clutch master cylinder connector, and plug in the reverse lockout solenoid from a tr6060.

 

[Widebody_moparmike]

“Crappy relay diagram”. Haha. Here’s mine…. Maybe it will help 😂 View attachment 103948

Similar diagram

 

[Widebody_moparmike]

My way probably isn’t cost effective for a big shop, but it guarantees the car can be replaced back to stock easily and everything works like factory with zero lights. My car is an A8 with the RF hub from an m6 (my entire car was an m6). Everything works like stock, I even have paddle shifters. Only thing that I don’t have is the remote start. All I had to do was replace wiring, reconfigure BCM, and have PCM flashed from m6 to a8 os. The m6 cars works out of the box pretty much with the TH400. When I did it, my rf hub read the config from the bcm - did not need to touch the RF hub. So, if you wanted to do the TH400 swap on an A8 - you’d replace headlamp to dash harness, engine harness, flash pcm, config bcm, neutral saftey to clutch master cylinder connector, and plug in the reverse lockout solenoid from a tr6060.

If there’s no making it work with current items I’m moving to a stand alone if I’m spending money , at least then we’re skipping all bs items that require someone’s specific scan tool or begin a test dummy

 

[Marc W]

If there’s no making it work with current items I’m moving to a stand alone if I’m spending money , at least then we’re skipping all bs items that require someone’s specific scan tool or begin a test dummy

I can tell you that the Holley Dominator with its capabilities is astounding. It works with you instead of against you. There’s no “dealing with” or working around obstacles. The programmable digital dash is a wonder. It is a touch screen that can be configured to look like and tell you whatever you want. Tired of looking at one? Touch next and see another one with different info.

 

[Unholy707]

You’re g

I can tell you that the Holley Dominator with its capabilities is astounding. It works with you instead of against you. There’s no “dealing with” or working around obstacles. The programmable digital dash is a wonder. It is a touch screen that can be configured to look like and tell you whatever you want. Tired of looking at one? Touch next and see another one with different info. View attachment 104123 View attachment 104124 View attachment 104125

iving me really bad ideas @Marc W

 

[Unholy707]

Similar diagram

Honestly not a bad diagram tbh