can some one help me with removing 1/2 of the t/m

[acman410]

I need to see if anyoen could help me take out have of the t/m and also firm up the shift points on a 05 4.8 truck ??? :huh2:

[jimmyblue]

First you want a baseline log, so you know what kind
of changes result. You should log Delivered Torque - Engine
and Delivered Torque - Trans as well as the usual RPM, MPH,
TPS, spark advance, spark retard.

On this shakedown log you will probably see timing slam
to -10 and delivered torque drop to near zero.

After this, go and edit up the Torque Reduction vs Torque
vs Shift table. Cut all of the reduction values in half (for
starters). Go for another logging run.

Observe the engine torque cut (the trans is kind of
questionable in my book) across the shifts. Low,
middle and high throttle. The trans torque right
before shift is what's used as the TRTS table. The
engine torque though is what you want to watch for
results. How low does it swing across the shift and
how much timing dip? The timing retard should match
what's in the table as pointed to by the trans torque.

If you're still getting too much cut then reduce the
TRTS table some more. If you're happy in spots but
see too much in others, then follow the trans torque
index and just massage that local area.

This is going to be iterative and individualized as the
hardware and the built in trans torque model push
the trans torque reading around. Just have to cut
and try.

[acman410]

Thanks for the help kinda new at this but learning

[acman410]

How can i up the rev limiter and also make the truck shift out at higher rpm at wot


and what is the highest line psi i should run on a stock trans and stock 4.8

[chrisj6]

Arent there more than just tranny TM tables that can be zeroed out if you want it all gone? I zeroed out all of the TM tables in the engine TM along with the tranny TM tables. oh, btw, I think the max line pressure they let you tune for is 90, you just have to trial and error it until shifts are perfect for you, if your not running boost or extremely high power levels and beat the crap out of it you can run as much line pressure and TM as you want.

Chris