Need a little help understanding TM and Tuning for Economy

[Burnmyeyes]

I have a 2007 Silverado NBS Z71 5.3 and i have read peoples posts about TM and am not understanding what I should really do. I dont want to eliminate it just remove around 70% or so. Also looking to improve my hwy mpg. Thanks in advance

[Burnmyeyes]

Any help at all guys......

[jimmyblue]

There's various sorts of torque management. Some is
for protecting the transmission, some is used for traction
control, some of it is just "there" but does nothing.

I recommend that you keep all or most of the trans TM.
Removing it won't net you any performance. If you are
bothered by the head-hits-dashboard during shifts,
that wants fixed in the desired shift times or more
properly by the shift pressures (desired shift time allows
the PCM to "think", which is not often a good idea). A
short shift cycle time will make you not notice the TM
action.

I've tried a variety of approaches and ended up at one
where I simply tapered and limited the spark retard vs
torque reduction table to 10 degrees positive (vs the
stock limit-field that will let you go to -10 degrees).

Highway MPG for that chubby brick, you've only really
got fuel and spark to play with. I'd begin with bumping
the O2 sensor switcpoint voltages down, in the airflow
mode regions where you cruise - trucks are set up fat
from the factory, like 450mV or 500mV, while the cars
are 350mV and this makes about a full point of AFR
difference with cars being ~ 14.5 and trucks 13.5, in
my limited experience. You can push it more, to get
a leaner cruise (as distinct from Lean Cruise), though
at some point you'll start to see surging and then you'd
rather back off a tad.

[Burnmyeyes]

Ok man thanks. Ill try and figure out where to make the changes. i just started using this software. Although i understand what your telling me to try i am pretty foggy as to where and what tables i should actually make the changes.

[Burnmyeyes]

Yea im just not getting it. Anyone care to share?

[NADC]

If you have DOD get rid of it. Get rid of all tm, back off of 1-2 shift pressures change dfco to 1800-1200 add 3deg timing to high and low octane tables I gained 6-7 mpg