Hello

[joemopar]

What a great forum to have. Thank you. It will be very helpful.

I am putting a 2015 8HP70 into a 2009 SRT challenger.  I am ready to order the Sound German controller. Any advice is appreciated. I don’t expect it to be a big deal but you never know. A schematic of the original TCM wiring would be helpful if anyone has that.

I did find a required 8 speed shifter. I still need a good Denso starter which appears to be on the drivers side instead of the passenger side of the Nag1.

Thanks

 

[Robin]

A friend of mine swapped a hellcat into his 68 Charger and it has the 8 speed behind it. He bought the controller from Sound German.

I think he used a 6.4 starter.

[Robin]

Part number for the 6.4 starter 5035102AA

Part number for the heat shield 4854640AG

[joemopar]

Thanks. I ordered and received a new starter 5035102AB. Later model, not sure the difference. All the rest of the parts are ordered as well. The problem now is the driveshaft. I need to know the exact difference in length between the Nag1 and the HP70 from the bellhousing to the driveshaft mounting surface to get one made in advance. I have a Ford 8.8 differential so it will be unconventional, and will need a CV on the front side for a little give.

[Robin]

The best way to determine the length of the driveshaft is to mount everything into place and measure the distance between the trans and the rear end. There will be a flexible piece on the new driveshaft which will go in and out when the car is driving over bumps and dips. The flexible piece will take care of the difference in driveshaft length.

 

Take a few pictures of the situation and sent the shop an example of how the driveshaft should look like.

[joemopar]

There is no give to the differential, it is mounted solid to the body. There will be no slip joint, but found out the CV on the front of the driveshaft will have some give to it according to the driveshaft shop. The shop sent me a diagram of the points they want me to measure from. They made a 1 piece shaft for my ’16 Cat like that and it was fine. I am remembering that now.

Keeping torque-management in place is critical on these transmissions near as I can tell, they are real good units but need some software magic to make them live over time unlike a 400 that could pull a tank. More than a few Hellcat HP90’s eventually burnt up when they first came up with trans tuning and some tuners removed TM so I am wary. The top tuners leave that in place is my understanding.

I am being told that I will still have the torque management capability with the Sound German setup in my ’09 that used TM with the Nag1. I will start with stock settings if possible.

Thanks for the reply.

[Outkast]

<p style=”text-align: left;”>Sonnax makes adapters so you can get a driveshaft made. Uses 1350 universal joints. Just make sure to put a slip joint on one end for installation. These are what I’ll be using on my 2015 Challenger.</p>
Transmission flange:

T35-ALFY-07

Differential flange:

T35-ALFY-08

[Author]

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