Computer Diagnostics and Tuning Technical discussion on diagnostics and programming of the F-body computers

TCC lockup at 93-100% TPS. Is this the stock flash?

Thread Tools
 
Search this Thread
 
Old Mar 4, 2006 | 06:09 AM
  #1  
mike 96 ws6's Avatar
Thread Starter
Registered User
 
Joined: May 2003
Posts: 268
From: Ocala FL
TCC lockup at 93-100% TPS. Is this the stock flash?

I've looked at a few programs that are supposed to be stock. They have a value of 95 MPH entered for TCC apply in 3rd and 4th performance mode at 93% and 100% TPS. The value is 255 from 31% to 87%.
Is this stock programming that locks the converter at 93% and WOT in performance mode at 95 MPH?

My info is from 4 different 'supposed to be stock' programs viewed with OBD1 LT1_Edit version 2.2 in the 'TCC apply in MPH vs TPS' table.
That doesn't seem right???
Old Mar 4, 2006 | 09:00 AM
  #2  
Ricardo's Avatar
Registered User
 
Joined: Feb 2004
Posts: 674
Re: TCC lockup at 93-100% TPS. Is this the stock flash?

Just out of curiosity I went ahead and opened my stock file in LT1 edit and it has the same values you list. My file is OBD2 out of a ´96 A4 and checks with what you wrote. TC apply is set at 95 MPH for 3rd and 4rth in performance mode at 93 and 100% TPS.
Old Mar 4, 2006 | 09:12 AM
  #3  
mike 96 ws6's Avatar
Thread Starter
Registered User
 
Joined: May 2003
Posts: 268
From: Ocala FL
Re: TCC lockup at 93-100% TPS. Is this the stock flash?

Thank's Ricardo for checking that. I didn't think GM would program the PCM to lock the stock converter @ WOT. My aftermarket converter manufacturer said they will void my warranty if I lock the TCC @ WOT. Go figure...
Old Mar 4, 2006 | 09:55 AM
  #4  
Ricardo's Avatar
Registered User
 
Joined: Feb 2004
Posts: 674
Re: TCC lockup at 93-100% TPS. Is this the stock flash?

Mike:

There is another table in Lt1 edit in the 2.2 version for the TCC apply that is supposed to override the %TPS tables. This is the TCC apply MPH. It is supposed to act at WOT. It does not specify wether normal or performance mode, and it is also set at 95MPH.
I have a PI Vigilante and have never felt the TCC locking up at 95 MPH during my passes at the strip. I wonder if it will lock in performance mode.
Does your WS6 have the button to access the performance mode and do you use it at the strip?

RG
Old Mar 4, 2006 | 12:14 PM
  #5  
mike 96 ws6's Avatar
Thread Starter
Registered User
 
Joined: May 2003
Posts: 268
From: Ocala FL
Re: TCC lockup at 93-100% TPS. Is this the stock flash?

I see that table is set to 255 for 2nd and 95 for 3rd and 4th in the stock tune. I set those values to 255/83/83/ in my own tune and the values in the 'TCC apply in MPH vs TPS' table are set to 83 in 3rd and 4th, normal and performance, 93% and 100% but I still don't recall ever feeling my stock converter lock @ WOT. Maybe the RPM change at that speed / WOT is so little that it is not noticable. I fried the clutch in my TCI converter before I ever got to try WOT @ 83 MPH in 3rd or 4th so I don't know?

What exactly does that 'TCC shift delay' table do? I tried adding time to the 2-3 shift section after I built my transmission and had a 2-3 shift hang-time problem, but it had no effect that I could tell. I wound up having to correct the timing problem by changing the modifications I made to the valve body and 2-4 band apply piston return spring. After that I entered several different values there but still could not tell any difference.
Old Mar 4, 2006 | 12:19 PM
  #6  
mike 96 ws6's Avatar
Thread Starter
Registered User
 
Joined: May 2003
Posts: 268
From: Ocala FL
Re: TCC lockup at 93-100% TPS. Is this the stock flash?

Oh, I forgot.
I don't think any of the 96 WS6 models used that button. Mine does not have it. Seems like I read somewhere that the programming for the PCM's on cars without that button stays in performance mode always, but I'm not sure about that. I'll look around to see if I can find that info again.
And in case that is not true, which it may not be, I have all my values in the normal mode tables set identical to the performance mode tables. lol

Last edited by mike 96 ws6; Mar 4, 2006 at 12:22 PM.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
DirtyDaveW
Forced Induction
13
Dec 1, 2016 05:37 PM
canbaufo
Parts For Sale
7
May 25, 2015 12:01 PM
jasonduaine
LS1 Based Engine Tech
3
Mar 7, 2015 09:44 AM
MyShibbyZ28
Parts For Sale
0
Feb 14, 2015 12:05 PM




All times are GMT -5. The time now is 07:15 PM.