Wow I just finished reading the whole thread, lots of great information!
Wow.... This was a ton of info to take in at one time. excellent info. I only piddle with EFI live on a very few customers of mine, but I have put a good bit of time into my personal truck. 09 Sierra LY2. I have adjusted TM and shift times awhile back and about two months ago installed 1-2 vette servo and 3-4 supper hold servo. Even with the TM adjustments the shift felt great. Not violent, but firm. I now have changed gear from 3.55 to 4.10 ( all this to compensate 35" tires ). Now the 1-2 shift is brutal!!!! I have returned TM back to oe settings, and it helped, but still to harsh. Any suggestions on next plan of attack? Main purpose of servos where to no smoke slush box 4l65E with the tires and now I'm afraid its going to grenade.
Anything above 18% TPS will "slam" on 1-2. Thank you in advance for any advise.
Wells
Set 1-2 shift pressure table back to stock, add more 1-2 torque reduction.
Also, see this: When-throttle-kickdown-is-not-set-at-100
Joecar,
For the shift pressures is it safe to just copy the pressures from the performance side of D701, 702 and 703 to the normal side?
You can go a little higher...
I do this: make a straight line from (0, 0) to (399 ftlb, 96 psi)... do this on all 3 PT upshift pressure tables;
then set all 3 PT upshift time tables to 0.25 s;
then go for a drive, adjust shift feel by adding or removing TR from the shift torque reduction tables;
I also add 1 extra pint of ATF above the hot full mark (if you do this, check dipstick to make sure ATF is not frothing)... if you're drag racing this will help to keep filter submerged.
If decreasing TR does nothing to the up shifts, do I need to increase pressure?