This is on my corvette. What do you guys usually change in the auto tranny setting to give it a better and harder shift? I did bump base pressure and took some torque management out already

 

IMO, I wouldnt mess with line pressure. I would just move up the "desired shift times" up by 50% - 60%. You all ready got rid of the TQ managment, mine says 0.

 

ok so on desired shift times table D1108 should I lower the numbers? I assume since performance is at 0 then going lower numbers would quicken the shift?

 

Yea, you have D1108, 09 and 10... I would try -50% and see how you like it, then maybe go a bit more until it feels nice...

I would put the pressure back though.. When you just incresed line pressure, how much difference did it make?

I have 0 in for my TQ reduction tables... But, I also have a FLT stage V now to though, my stock trand blew up after 2 WOT runs after my h/c install.

 

well i had a tune from Jesse at Wait4Me and he upped the line pressure some all the way through the tables. It shifts great under full throttle but I just wanted to crisp up the shift in the light throttle range. I just lowerd the numbers in the shift time table. As for the line pressure the only area I changed from what Jesse done was the shifts in the low RPM. I think maybe I'll put all the pressures back to where Jesse had it. Everything shifts great when under hard throttle, just the light throttle I feel could be a little better. Here is what it looks like

 

Although my 60E in my car is vaccum modulated now, in my 07 Silverado, I -50% and I could feel a a huge difference under normal driving.

 

I zero out my WOT shift mph tables and set the WOT shift rpm table up to what I desire so it will be consistent. Change lockup speeds. Thats really about it you dont want to mess with pressures

 

Where does all of this idea that pressures under max shouldn't be manipulated come from?? You guys must spend too much time talking to tranny builders who automatically assume that when you mention this that you are raising MAX LINE PRESSURE. As long as max line pressure isn't raised, you can set whatever you want in the pressure table that plots pressure against calculated tq for GenII cars. GM does it; look at the differences by years, max pressure is the same but profiles under the curve change.

Removing tq mngmnt and lowering shift times still won't get a stalled GenIII car where you want it unless it is a very small converter (or you like marshmallow shifts ).

 

I don't like marshmallow shifts at all. So you don't think having the line pressure will hurt it where I have it now? It's not like it snaps your head off. It will chirp the tires when shifting at full throttle

 

I did the same thing.. one less table/variable to worry about.

 

so what table is this?

 

doesnt really do with yoru shift speed/trans pressure...

Its the VSS table... The car looks for a certain speed and rpm in order to shift, if you take away the VSS table (mine are actually set in the single digits) then alls you need to do is use the RPM tables. So, since you have a low number in the VSS table, it meets that requirement and looks for rpm now.. Its easy to adjust when you have rev limiter issues, car shifting early, etc under WOT.

My point above on the line pressure was if you can get the shift firmness you need by just changing the shift speed, then no need to bump up line pressure.. It might take both to get it where you like it, each car is different. If you have a stock trans, its going to put more wear on it, im sure you know that though.