Under transmission - Shift general tab
Shift Pattern A == normal
Shift pattern B == Pattn1
This is the OEM calibration.
Truck has tow/haul mode which I guess is Pattn 1
In all the other tabs there is no further reference to Pattn 1
I need to firm up the 2-3 shift in tow mode and I'm not seeing a pattern that allows that.
Any input welcomed.
Last edited by ca434sbc4; 08-01-2021 at 08:03 PM.
There are only two things to pick from really. For shift pressure it's either pattern X or pattern Y. The pattern X is going to be for normal shift modes.
I would bump the shift pressure for pattern Y a little bit. Do like 80,100,121 psi in the mid range of torque. I would lower the shift time for part throttle area's in the shift timing torque adder table for the 2-3 shift. You can easily drop it from .5000 down to .4000 or slightly lower. I make all the half ton trucks shift around .3700-.4000 for part throttle and .3000 at full throttle.
2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.
If you don't post your tune and logs when you have questions you aren't helping yourself.
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