Transmission tuning. what needs to be done?
Transmission tuning. what needs to be done? 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
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.
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.
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.
Last edited by mvvette97; Jun 12, 2009 at 12:59 AM.
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
Trending Topics
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
).
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
). LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo 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).
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
). 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.
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.