Opensource Zf 8HP transmission controller

[dctm50]

It is obvious that the Zf 8Hp is an amazing transmission and will offer a lot of drivability comfort and performance in comparison to old 5 speed manual transmissions.

The negative part that is stopping this huge step forward in the community is the fact that we need to pay 1000+ for just the control unit to put in a $500 car not to mention adapters tuning and the hastle involved over paying the money, and this does not make sense.

Our community is huge, so to assume that we are unable to create an open source Arduino based option is completely insane.

The 8HP is an automatic transmission so I believe most of the solenoids are on/off solenoids except for the clutches that are PWM i believe.


Option 1: Isnt it possible to use the stock tcu and control by injecting the specific can messages

Option 2: do as Damien Maguire did with the 5HP and use previously written code for many other automatic transmissions and modify it to work with the 8Hp


A manual only mode is good enough as far as I am concerned...

Please let me know if someone is already working on it...
I know HTG have done it and Turbo lamik, but they charge 1000+ for the controller and if they did it I bet that a collaboration in the community will do it and provide it as an affordable and open source solution for all of us.

 

[doublespaces]

Community projects are always great, but where do you propose we start and who stands to gain from this and will bring the skills and most importantly, the time?

 

[dap03]

Here's a starting point:

Zf 8hp70 mated to sbc

I just finished swapping a 8 speed auto from a dodge ram into my 67 chevelle. I'm posting this only to offer anyone interested in doing this any help / advice based on what I did to make it work. it's really not too bad, I decided to rip the existing controller out of the tranny and used an...

www.pro-touring.com

And heres the cmcnitt going into how he did it further:

318/8 Speed Swap

I finally got my hands on an 8 speed transmission (8HP70) out of a 2018 Challenger this weekend. This particular one looks to be from an SRT 6.4 Hemi car. Supposedly, it only has 5,000 miles on it. I was able to get it mounted to a spare 318 I had in the shop. There are some custom adapter...

www.forabodiesonly.com

 

[135boost]

Those solenoids are proportional ones except the black one and of those a part is opening and part is closing ones so
no luck with just drive power to them, so just go for turbolamik or similair.
gear change sequence on those is much more complicated than just "push gear on with powering solenoid"

first issue is sequence when you change gear, it start with (auto or manual) fullified command "change gear"
then there is prefill sequence in that ongoing clutch where TCU is driving clutch pack to "skin" so there is no slack
left
after that it loosens offgoing clutch at same rate what it tighten ongoing clutch pack on a way both pack summarice
whole sequence off+on= torque what it kept on lower gear at the beginning of gear change and what it is to be after it.

this is influenced very much on adaptations where transmission has learned from clutch free play how much there is
to be precharge time etc.

on downshifts there is similair more complex logics too so like i suggested... turbolamik or similair is the way to go