Thanks for the reply's, you've given me some things to have a look and hopefully try out over the weekend. Any idea what the shift table might be called in TunerPro, I had a quick look but couldn't find anything that looked quite right?
I also had a look at Bluecat transmission software but I couldn't find a tutorial that showed me how to use it, I'm guessing it's a quicker way to modify the shift table.
Bluecat is very straight forward. Hover over the parameters and it has an explination of what it does. Been using it for a few years here.Originally Posted by Kitch
Hi Fast, is there somewhere I can find some good starting values to input into Torque converter table for my 1995 Yukon and can you recommend a good tutorial on how to best use the Bluecat trans table generator?
Are the tables that I've shown the best ones to adjust in TunerPro?
96lt4c4, are these the kickdown scalars you were referring to?
I had a feeling I'd previously adjusted the kickdown TPS% on my 1994 G20 van's modified BDTZ.bin and the "TPS to Enable Kickdown Mode" was set to 64.8% and the "TPS to Disable Kickdown Mode" was set to 60.2%.
Yes Sir!
-1999 Hugger Orange SS, LS2 402 T56, 9 inch Ford 3.90 gears, Tuned with HP Tuners
-2002 Cavalier, Tuned with HP Tuners
-1994 Full Size Blazer ,383 TBI 4L60E, 4.10's, Tuned with Tunerpro RT (Where it all began)
The big table on the left is the one I'm referring to. Plot that table in another program that displays each column as a line because the way Tunerpro displays it will likely be useless.
Here is the table I started with and what I ended with. See how I made the new curves roll up quickly and kept the up and down shift curves fairly close to each other.
The big stupid jumps at the ends of the stock curves cause the transmission to "stick" in the same gear until you go wide open and then it will downshift but if you lift at all it up shifts again. My curves will start downshift as the throttle opens more and more.
As for the TCC, you do a similar thing. Figure out what %TPS at each speed in the range you want it locked and then set values a little higher in the lock and unlock tables.
Attachment 10655Attachment 10656
The pictures really helped show how it works, I can see how the modified curve @ 60MPH would downshift from 4-3 at about 57% TPS. I manually plotted my stock curve and it looks like it would need 73% TPS for the 4-3 downshift.
And I didn't get too aggressive with that 4-3 curve compared to the lower gears. I mostly left it like it was.
One thing you do have to watch with a truck is getting too aggressive because if you load it then it either won't want to upshift or keep dropping back a gear any time you touch the throttle.
I would also recommend to make the kickdown table speeds the same as the main shift table. So, if you set the kickdown to 80% TPS make the speeds the same as the main table at 80% TPS.
I've been manually plotting some new shift tables to try out but I don't want to change anything until I find the TCC lock and unlock tables, there seem to be a lot of parameters with TCC in them which ones need adjusting after the "upshift/Downshift MPH vs TPS " table has been changed?
If I raise the upshift RPM table values from 4000RPM to 4400RPM do I need to manually recalculate and raise the MPH values in the upshift MPH and downshift MPH tables, as the MPH values appear to have stayed the same?
Last edited by Kitch; 06-25-2016 at 02:06 PM.
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