[Power Hungry]

Originally Posted by cleatus12r

JHowever, there are other things to consider as well like torque reduction during shifts. A lot of tuners command 100% torque during a shift. The factory runs between about 85-93% of torque during loaded shifts. Just doing this makes the shift feel more firm. I don't do it because I hate firm shifts when hauling a trailer. Don't get me wrong, there is a HUGE difference in a soft, long-burning shift and a "good" shift....the latter is what should happen under all driving conditions. A short "burn time" with a noticeable yet pleasant shift. I usually run 70-80% torque during a shift with the lower output under heavy load shifts.

Cody,

What you said is exactly the reason we have to be very careful how torque reduction is handled. There are programs where the torque reduction is reduced or eliminated to achieve a specific feel, but it should never be removed on towing programs where a significant load is being pulled. It's a quick way to overstress the hard components as well as the clutches.

Installing a modified valve body has a significant advantage because it allows the transmission fluid to flow more easily through the programming orifices and results in faster flow into the clutches and more responsive clutch activation. Also, because the fluid no longer needs to be forced through at higher pressures, there is also a resultant drop in tranny fluid temps... often as much as 25-30 degrees.

Good questions, for sure.