Whatcha talkin bout Willis? The guys on the LT1 edit list chased that problem for years and someof them were running the vss signal off the antilock brake encoder & stuff like that or changing to OBD2. There was some speculatiion, also, that it was related to guys that had used a hypertech program at one time cause that loads a different program into the pcm and never really puts back the original tune, but I don't know if that's true or not, but you see that hypertech changed some of the rpm numbers to 1xxx rpm so it shifted by mph and that might not have helped. Hell, I never got good enough traction at the track to see if I have the problem or not, but it's never happenned on the street or otherwise. I bet that's a real WTF feeling to have that happen during a run at the track just when your adrenalin is pumping and you're all leaning forward watching the gauges, then it shifts into 3rd & bogs and you have to watch the other guy (assuming not a honda) go flying by.

The other thing is some guys just protect knowledge because it is power & money. I don't know who said this, but "The first rule of success is to not tell everything you know. The second rule is..."

 

Yep, I remember some did take the VSS signal off of another spot, and you're right it is like !!!! when you take off and the car just slows..... then oh s%$t I got it now too. that was my best 60' too. 1.8XX on drag radials with 2.73 gears too. I tried all the stuff that worked for some people, set the mph way low and tried shifting by rpm but that didn't help, I never tried to take the Vss signal fromaonther spot, I just dumped the 700 into the TCI trans controller and never looked back. That was then, the car's been gone for a few years, I drove a Vega Panel wagon for a couple years and now iIm back to another red 95 Z28 w/A4 and 2.73's. Go figure.

 

I'm sure I went 1.85 before but I was still spinning like a **** and I don't think I ever really stalled the 3000 Vig very high even with standing on the brakes and you would think I should be able to with all the torque I have and the big front brakes and all. Those big front brakes are a mixed blessing, cause they sure as hell stop the car better than the pos stock ones, but I've modded myself int o a bit of a corner where I'm afraid to use slicks on the back with 275/17s on the front cause I can't fit skinnys any way that I've heard yet, anyhow. So I',m still using drag radials and greasing up the track with my launches cause i also refuse to turn my (front) suspension into drag only -except that I do, however, have a Spohn torque arm lowered solid LCAs, bags, & adj HALs on the back. The front is heavy though and I probably need to spend some time just tuning the suspension and maybe get adj shocks up front then maybe I can experience the 1-3 fun.

 

I think I remember reading somewhere what EW had found in the code that he thought was going to fix it. I had 2 people go through the code for me, and neither were able to find this supposed "table".

In all of your searching through the "hints", did you find enough info to get you going in the right direction?

BTW...you have a smart friend there.

 

Well, i don't know for sure what he found, but I do know this. The secret he had came out that he found a table that controlled the VSS and that was the one he used to fix the problem(as far as I can remember) Now I do know this too, TC ver 1.98 DIDN'T HAVE THE VSS /RPM CONSTANT IN IT. Ver 2.11 does and it makes sense to me seeing that constant. LT1Edit didn't have the constant in it either as far as I can remember too. I looked at that constant in my TC update and the VSS/rpm value is.... yep 3000 So I'll go from there.
As far as my friend, you most likely have heard his name mentioned or even conversed with him on here although he's not on much at all anymore

 

Then you're on the right track.