Allison 6sp: A40 TCM No Defuel Control?

[IOWA LLY]

Has anyone been successful turning the de-fuel function off in the A40 TCM?

It shows the same options as the 5 speed tcm, but it doesn't seem to work. I know for a fact it works in all the 5 speed operating systems.

The TCM I'm testing this on is OS, 10377105. In a 2007 classic truck. The table I'm referring to is, D5197.

Anyone have any ideas? Is this just an issue with this TCM OS? Or does this function not work at all in any of the 6 speed TCM's?

Thanks.

 

[Harbin_22]

It doesn't work. You can make it not defuel in ECM tables though.

 

[IOWA LLY]

How? Are you just talking about manipulating the torque tables so it doesn't defuel as much? Or is there a way to actually turn off the command itself?

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