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8 speed HP90 in an '09 SRT

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Moderators: mikel, 06MonteSS

Post Mon Jul 29, 2019 9:45 am

Posts: 2
Hey all, glad to be here. Actually at my age I am glad to be anywhere !
So what will it take to accomplish this conversion ? I see greasemonkey garage has done the hellcrate and 8 speed in at least 2 older vehicles using DIABLO tuning I believe. Torque management must be left in place. Sound German Automotive claims to have done this but using a Hellcat trans it will only shift in default, or street mode and they don't even know what torque management is. I understand the CAN protocols between the '09 and the HP90 are not compatible ? Would I have to switch to a '15 and up dash, wiring harness and the works ? I need that 8 speed, my Nag1 just is not reliable. Plus, I saw the jump of about .2 or .3 in the quarter mile when they went to the 8 speeds in the 392's. I would not need to rpm my engine so much. Thanks for any ideas.

Post Mon Jul 29, 2019 10:35 am

Posts: 55155
Location: DiabloSport World Headquarters

Honestly, this is not an area we have spent a bunch of time trying to figure out.
I would suggest you check out someone like hemituner performance or someone that has done some of these types of swaps for some first hand information ;)
Mike Litsch
Powerteq Customer Service Manager
Diablo Tech support by phone:
561-908-0040x4
M-F 8:00 AM to 5:00 PM EST

Post Mon Jul 29, 2019 12:03 pm

Posts: 2
AJ did my tune and says the protocols are incompatible between the PCM and TCM. But someone out there is making it work in other vehicles, somehow. Thanks.

Post Mon Jul 29, 2019 3:49 pm

Posts: 55155
Location: DiabloSport World Headquarters

Well, I know AJ is an incredible source of knowledge on these vehicles, but keep digging!
Mike Litsch
Powerteq Customer Service Manager
Diablo Tech support by phone:
561-908-0040x4
M-F 8:00 AM to 5:00 PM EST

Post Sun Aug 04, 2019 5:47 pm

Posts: 6687
Location: Between Orlando and Tampa
Doesn’t Mopar sell a controller kit that allows use of the Hemi and 8 speed in classics? That would probably be the easiest route.
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