Installed 2009 E67 into '08 TBSS(no start)

[ScarabEpic22]

Ive read all the discussions regarding swapping a 6spd trans into a TBSS and if there's a way to do it I want to know. There's a chance I might be getting one soon myself and yes the 4L70E shifts much better than the regular 4L60E in the regular TBs but the 6spds are just so much better. Plus 2 more gears is a bonus! Ill be watching this thread like a hawk, but I understand XLR8NSS's dilemma, to go through all the hassle of swapping a 6L90E in then not being able to make it work because of ECM/TCM comm probs would flat out suck.

[TBMSport]

Any update on resolving this? Is there NO way to add CTS-V's e67 tunes/parameters/OS can be 'flashed' onto our TBSS e67?

What is the actually changes in the '09 E67 that make is incompatible with older E67'?

Jesse

[TBMSport]

What about using a Hybrid E67 and adding T43 functions? Also, beside a harness change to reroute PIN outputs, could a simple e38 swap work to add the T43? Maybe a reflash of the BCM too?

[TBMSport]

I applied the VATs disable patch, would those values make any difference if VATs was disabled? I also set it to type 2 and G1204-1206 are turned off.

Currently G1214 is 3 and G1215 is 600.

Brainstorming over here. Also, another thought. I'm not fully up on the CAN aspect, but perhaps the ECM is needing a signal response from the T43 to move forward with processing anything (e.g. start the motor)? Or maybe that checksum CVN issue?

[Stealth97]

1. I'd get the 2 bar MAP sensor or whatever is required just to rule that out of the equation. You said the goal is to get the factory boosted OS working anyway, so you'll need that part once you do figure it out.

2. You alluded to the fact that maybe the wiring is different from a CTS-V and a TBSS. Why not get the alldata sheets and compare them? Rule out if anything is different with the PWM fans or the trans. Maybe that accounts for something right there.

3. What happens to a vehicle with VATS on this PCM? Does it just not crank, or does it still crank like in my 1997 with a 2002 LS1 PCM but not start? Are you experiencing VATS and you don't know it, but think the VATS patch is working? Maybe the patch isn't working or is corrupt.

4. What is different in the VATS from the CTS-V and the TBSS? Could you leave VATS alone possibly? Another thing to rule out from the equation.

5. I wonder if the PCM will make a no start condition with the wrong TCM attached. But why no code for it? Something else to think about.

Conclusion: If the pinouts for the CTS-V and the TBSS are the same, and the VATS patch is operational, why couldn't you swap in a 6L90E and use the 2009 PCM? Theoretically if the TCM is the issue on the no start condition, the correct TCM and trans would now solve that issue.

The PCM can only see things connected to it. Not what year vehicle you have (08 TBSS). Running the correct 2009 CTS-V OS in the correct PCM it came from should be just fine.

I'm thinking you need to think about 1-5 above, and once you think you have doublechecked everything, maybe connect a T43 and 6L90E from outside the vehicle (extension harness or something?). Just for a test run to see if you get the motor to fire over.

I don't doubt that you can somehow, someway, run a 2009 CTS-V PCM, in a 2008 TBSS, without TOO much hassle (like a wiring harness complete swap. Wires are wires are wires says me. Put the wires in the right spots and the PCM will think it is still in a 2009 CTS-V, right?). But a 6L90E MAY be required.

I hope this helps. I really am interested in your post and getting this working. One reason I stay away from the new stuff is all the restrictions and big stops encountered. On the older stuff someone ahead of me has done it and has perfected it or made it work somehow.

0.02

Stealth

[TBMSport]

I just got the GM Service catalog on CD...haven't installed it yet, but it covers up to '08 so I can get the TBSS schematics. Anyone got the pin layout of the CTS-Vs e67?

[TBMSport]

ok...where are my north NJ area tuners? Can the CTS-V e37 be programmed to remove boost so we can do a N/A engine through it? And can the VIN be changed to my vehicle while keeping all other things as is?

[XLR8NSS]

Hey guys, I don't have any updates right now, just been too busy to mess with anything. :(

Stealth97 - I think one thing I need to check also is a '09 Caddy accelerator pedal. Maybe that accelerator pedal code is keeping the engine from turning over. It would make sense to kill the starter if there was a pedal fault detected. Anyone got a '09 Caddy pedal to donate?

[XLR8NSS]

Also, I might have a 6spd auto close by that I could use for testing purposes.

[TBMSport]

That would make sense. Already got my eye on a 6spd auto. Can anyone confirm if the pedal of a regular CTS is different than a CTS-V?