This boggles my mind, in the performance tcc tables the values are set so the tc slips alot more than the normal tables. Does this actually increase performance or is GM just trying to fool the driver by allowing the engine to rev higher? I programmed my car with the performance tables as my normal tables and the car seems slower than with the stock tc tables. From a roll at about 35mph if i were to floor it, it felt like the tc was slipping like crazy, causing slower acceleration but higher engine rpm.

 

Wierd. I don't have performance TC tables so I cann't comment. I must have an older EE file. For performance though, you want to keep the RPM way up and locking the TC up there is a no-no unless you want a new trans.

I would bet that all the values at 100% TPS call for unlock anyway. Performance or Normal. So there should only be a difference in the part throttle lockup points between the two tables. Is this correct?

 

actually in the performance tables, the tc locks at anything above 93.8 % tps at 95 mph or higher in 3rd and 4th gear.

 

Can you post the performance table values?

 

here it is

 

Mine does that also. It really slows me down when my converter locks up about 100. It just shifts into third and then it feels like the converter locks up.

Has anybody changed this?

 

If you compare that performance TCC table to the preformance shift table then at 100% throttle the TC locks up in third and stays locked up during the 3-4 shift.

100% TPS Performance Tables
2->3 @ 73 mph
TC lock @ 95 mph
3->4 @ 126 mph
---------------------------------------------
100% TPS Normal Tables
2->3 @ 73 mph
3->4 @ 123 mph
TC lock @ 255 mph (never happens)

Do these numbers match everyone elses?
Just wanted to establish a common ground before we discuss further

 

correct

 

After re-reading your first post, what are you kickdown tables set at?
Maybe your kickdown mph table is cause the problems you are seeing
between the performance and normal shift tables.

I have an RPM and a MPH kickdown table. You may also have "performance" kickdown tables in you def file. I do not.
I set my kickdown mph table a tad low so that the kickdown rpm table commands the shift. This way I can set the shifts at 100 rpm below the rev limiter and don't have to worry about the mph not being meet.

Stock mph kick downs:

1->2 @ 36
2->3 @ 73
3->4 @ 126

2->1 @ 31
3->2 @ 67
4->3 @ 118

If you are at a 30mph roll in 3rd gear and you goto 100% TPS then you are below the threshold for the downshift and the car will shift from 3->1st. Then again, if you are at 33mph then the car will only downshift to 2nd. Since the performance tables have higher mph values maybe there are some spots were you are downshifting one gear were as before you were downshifting two gears making the car rev higher.

You think this maybe it or am I totally off base? I don't think your tc points have anything to do with it. From a 30 roll going to 100% tps the converter is unlocked in both tables. It's either locked or it isn't.

 

i also have my rpm set low. Set to 1500 rpm in all 3 fields so that i dont ever have to worry about it not meeting rpm. My kickdowns are as follows...

1-2 : 31
2-3 : 62
3-4 : 103

2-1 : 27
3-2 : 57
4-3 : 95

i kind of see what your saying now. im still a bit confused on the kickdown tables though.

Also, there is no performance kickdown shift table. And just to be sure you are aware that the performance shift tables are used in trans ams only right? ive been using the data in the performance tables in a bin file from a TA with 3.23 gears. I figured 'performance' means faster. Who knows.

 

Yeah, the performance tables just hold the part throttle shifts longer.
As long as you just copy those values into the normal table your fine.
There is a button mod you can do to use the actual perf table like the TA. You most likely know that though.

Anyway, for perfromance, it looks like from these tables that GM thinks it's better to lock the TC in 3rd at WOT instead of not locking it at all as in the normal tables. Sounds good I guess. I mean, you don't want any slip if everything will hold together. When you start getting into higher hp numbers though it sounds like a recipe for broken parts.

Back to your high rev thing. If you use the performance shift values then yes, you will rev higher between shifts because the mph values are higher. It takes more time to get there. Mean while your foot is in the gas raising the rpm.