Best tuning strategy for T56 into 2005 4.8 4L60 GMT800

[eighty6gt]

Engine will be LQ4 6.0 with 243's, 220R from texas speed, stock intake and throttle body, 8.1 injectors. LS7 clutch, T56 Magnum.



I downloaded the following tunes and examined them with HPT editor:

2005 4.8 4L60E OS 12592618, , P59 ECM GM Gen3 V8, 4.3L V6 (I have not grabbed my tune from my ECM yet, will confirm it's running OS 618 shortly.)
2004 4.8 5 speed manual OS 12587603, P59 ECM GM Gen3 V8, 4.3L V6.
2005 4.3 (v6,) 5 speed manual OS 12592618, , P59 ECM GM Gen3 V8, 4.3L V6.
2005 6.0 Silverado SS, OS 12592618, P59 ECM GM Gen3 V8, 4.3L V6.

I looked for other combinations (SSR for instance,) nothing seems to work with engine generation/ECM, and there's of course nothing with a 6MT. Looking in the software, I do not see an area where you input transmission gear ratios. I do not, of course, plan on using CAGS, and I do not need the reverse lockout functionality. I'm mostly concerned with wild drivability faults/codes/engine behavior etc. from the automatic being gone. Perhaps the following is not even necessary if I painstakingly turn off a lot of codes/make modifications.

Anyway, based on reading some old posts here, I've come up with the following strategies:

Option a) overwrite my factory tune with a different OS, the 4.8 5 speed manual 603, provided the ECM is compatible. I'm not sure how to determine this. Since the vehicle and tune differ, I will need a license. I have 2x credits as provided with my new MPVI3.

Option b) segment swap the transmission segment from the 4.3 file to the file I get from my truck.

In both instances it seems reasonable to move the Silverado SS engine segment into my stock tune as a slightly better starting point than the 4.8, then change the injector-related information to start.

I'm going to spend the next few months reading posts and learning more about tuning, I've watched a lot of "goat rope garage" videos/others and have a methodical mindset. Thanks in advance for help with these basic questions.

[Aggie3rdGen]

TTT - I'm in the same boat. 896 ECM with P01, T56 swap. Would love to see some feedback on this. Issues with return to idle due to throttle cracker/follower and no rolling idle section.

[blindsquirrel]

You shouldn't need a different OS or segment swap on a Gen3. Gen4 is a different story. Gen3, just disable all the auto trans stuff.

If you look at two files of the same year/same platform that differ only by auto/manual, they're the same filesize. That's a hint that there's only differences in the settings and not in major sections of code.

[eighty6gt]

@blindsquirrel: Yep, I let this thread die and did a ton of reading instead. I'm going to start a new collector thread for my future questions once I actually start tuning, that's a ways off. Heads are at the machine shop right now. Thanks for the help and all your help around here.

Aggie, for idle/etc. I am studying the manual trans tunes (4.8/5speed, Camaro T56,) and seeing what values they hold. Just as with the VE tables/spark/etc. - comparing the 4.8 values I have to the closest vehicles in year/pcm/etc... with the engine I'm using. Silverado SS/etc.