WG Jeep Geek - Tinkering with Jeep Electronics

[Hoobz]

Originally Posted by Adrian D

What is it you are trying to accomplish with the Arduino project?

If it's a standalone ECU, there already is one, open source actually, search Speeduino and you can look at the code to understand what's going on.

For a standalone TCU, there's a guy who built a Mercedes 722.6 (same gearbox as on the WG CRD and WH CRD) controller and it's using an Atmega 2560 so it's possible. A transmission controller is much simpler than an engine controller, it will boil down to a state machine which jumps between states based on few parameters (RPM and load for instance).

You can also ask here

The original Arduino project isn't ECU or TCU related, but, I am very interested in ECU TCM programming, and Arduino controlling an engine and/or tranny is high in my thoughts also.

I have the Mega 2560 myself

Do you have a link for the 722.6 controller info?

I will be asking here also now.

Thanks heaps, much appreciated information for sure.

Should I start another thread on ECU TCM programming with Microcontroller thoughts on Ausjeep Jean and Adrian?

[Adrian D]

This is the 722.6 controller:
http://www.ofgear.dk

Nice bit of kit, I had one in my possession for 15 minutes before I had to ship it to my mechanic friend for installing a WG CRD drivetrain in a JK.

You can start a new topic or hijack mine:
http://ausjeepoffroad.com/forum/showthread.php?t=146593

I originally thought about reading the hex file of the WG TCU (or TCM if you want to call it that) to add new axle ratios. We have the tools and knowledge to do it but lack the actual time/motivation.

[Clarky]

I had a hell of a time trying to get my TCM reprogramed when I changed diff ratios from 3.55 to 3.73. I sent it to the states but they couldn't read it. Sent me one from a SRT8 that worked kind of but would go into limp when low range was selected.

I ended up buying a TCM from a USA based wrecker after discovering that all USA WK CRD's are 3:73 factory ratio.

To this day I have not been able to find anyone who can reprogram a TCM/U from a WH/WK CRD. If I had of found the OFFGEAR site I probably would have purchased that kit.

[Hoobz]

Originally Posted by Clarky

I had a hell of a time trying to get my TCM reprogramed when I changed diff ratios from 3.55 to 3.73. I sent it to the states but they couldn't read it. Sent me one from a SRT8 that worked kind of but would go into limp when low range was selected.

I ended up buying a TCM from a USA based wrecker after discovering that all USA WK CRD's are 3:73 factory ratio.

To this day I have not been able to find anyone who can reprogram a TCM/U from a WH/WK CRD. If I had of found the OFFGEAR site I probably would have purchased that kit.

When you say reprogrammed Clarky, was there confliction over transmission input speed/output speed/engine rpm and tone ring readings?

[Clarky]

Yep, something like that. Interestingly it wasn't an issue if I disabled the ABS by disconnecting a wheel speed sensor.

[oldon]

Originally Posted by Clarky

I had a hell of a time trying to get my TCM reprogramed when I changed diff ratios from 3.55 to 3.73. I sent it to the states but they couldn't read it. Sent me one from a SRT8 that worked kind of but would go into limp when low range was selected.

I ended up buying a TCM from a USA based wrecker after discovering that all USA WK CRD's are 3:73 factory ratio.

To this day I have not been able to find anyone who can reprogram a TCM/U from a WH/WK CRD. If I had of found the OFFGEAR site I probably would have purchased that kit.

Hey Clarky, I read in jeepaction mag about a bloke with a commander who had his computer done by JeepKraft when he went 4.1 gears.

[JeanLuke]

Originally Posted by Clarky

Yep, something like that. Interestingly it wasn't an issue if I disabled the ABS by disconnecting a wheel speed sensor.

Yeah, the WG uses the wheel sensors to drive the speedometer and to check for transmission slip. If you change diff ratios you'll cause transmission slip errors. I *thought* there was a diff ratio setting available via a drb-3 tool. No?

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