Okay finally got my data cable and putted he program, had to find an old laptop as my two USB-to-serial adaptors didn't work.

I already fixed my speedo, but now I need to play with my shiftpoints. He had the rev limitor set for 6500 rpm, that is too high for my tastes, as I already had a rocker nut loosen up on me at my last AutoX after slamming on the rev limitor too much. Going to bring that down to 6000 rpm and lower all my shiftpoints as they are set for around 6100 rpm right now.

My question is in TunerCat you have a lot of tables that look the same. Example:

Normal, Performance, Manual, Cruise, Kickdown, Hot Kickdown, and Cold Kickdown Up/Down Shiftpoints!!!

Only thing I know is the Performance table doesn't apply to the 94 Corvette. Could someone education me as it which table applies and when?

What I would really like to do is just fix my TCC lockup, bump it up to about 40mph, its set as low at 29 mph in some tables, and its getting annoying in traffic. Also if I could have the manual tables (assume that only affects when you manually select a gear) to stop ALL downshifts when I am using 1st or 2nd for AutoX use. I will keep the normal values for 3rd as I use that tooling around town below 50 or so to keep RPMs out of the resonence range.

Thanks in advance.

 

Try putting the car in drive only not o drive yoiu can try a hypertech tuner.
the computer for that year can be programed by the user first year for sfi and programable computer.

 

Car had already been reprogrammed by Ed Wright a couple times, this weekend was able to use TunerCat to change most of the stuff. Still having some issues with my shiftpoints with my lower rev limit, I had set it to shift 2-3 WOT at 65mph, but tranny didn't want to shift quick enough and would start hitting the rev limitor (now 6K) found out I forgot to change the Performance Up/Down table.

Does anybody have a list of which tables the computer looks at for shifting the 4L60E during different situations?

Overall its amazingly easy to change stuff, big different from my 85

 

Its me again I think the 1-2 shift break point is around 110 rpms that is + or -
I know the 2-3 shift point is 70 rpms +or -- that assumes that your starting at 0 so for every -1 or + 1 you are changing rpm by 110rpm on the 1to 2 shift and +or- 70 rpm on the 2-3 shift
-2 for 2-3 shift would be =140 rpms less
rpm +2 would be 140 more rpm
the rev limiter for the car restricts fuel to limit rpms
all shifts are elect and not real crisp shifts at higher gears 2-3 or 3-4
so as it starts to shift at higher rpms the fuel is released
causing a runaway condition for a quick second.
if it has high miles replace the fluid pressure regulator in the trans not a big deal to replace.
try a quick test
put the car in o-drive
stomp on the gas if the car vibrates replace pressure reg
still not sure put trans in drive stomp the gas if no vibration pressure reg bad. Boy did you understand what I said
let me know if you need more and i will get out the book.

 

Tranny has about 15K on the rebuild. All the shifts are crisp now excluding 2-3 at WOT only. Even 75% throttle and its perfect. I am going to lower the RPM and MPH points on the 2-3 shift again and reupload, try it again. Was reading on the TunerCat list that perhaps its an issue common to 4L60Es and large stalls of 3K, said to just try to back it off more, would shift higher then I expected anyways. Will report back if I can't get it to work still.

Still interested in the Desired Shifttime table, have another post on that.

 

What stall rating is your convertor? And what is t he rev limiter set at?

 

PI Vigilante 3K Stall. Set the fuel cutoff at a little below 6100rpm. Resume 5900 rpm.

When I first got the car rev. limiter was set for 6600rpm! And the shiftpoints were 6200rpm! They also hadn't been updated for the new gears (3.73) were programmed for 3.54s. It shifted fine with those settings, but of course was revving WAY too high, and I lost a polylock on my #1 intake rocker as a result. No point in going much over 6K as its a stock LT1 cam still with 1.6 rockers so not making any more power.

 

There was a problem with the OBD1 PCMs shifting with high stall convertors. 3000 stall is about the limit and some have even had problems with a 3000. If you like email me your VIN and I will give it a shot with the shift tables and such. Make sure you tell me what size your tires are and the gear ratio. You can take my bin and just copy the shift tables to your bin.

 

tjwong, Actually with the help of a couple TunerCat List posts I finally have been able to get it to shift correctly both WOT and part throttle. Just needed to set the RPM threshholds down to 1024 so they are always set.
I read something about ODB-I not really understanding the stall speed and also not really measuring the RPM and speed correctly, so it might "lag" behind what the car really was doing. Seemed reasonable. After tuning down some of the numbers to shift earlier then I wanted it worked just right. DataMaster logs show that it is shifting when I tell it and all is well