Torque Signal Pressure

[ferocity02]

I'm trying to dial in my 4L80E shifts focusing on the 1-2 shifts at the moment. When cold it shifts nicely, but when warm it shifts much firmer and is very annoying. Desired shift times are all set to zero because it has a shift kit. Shift base pressures are stock.

I've been tinkering with D0704 "1->2 Temperature Pressure Adjust". The units are PSI per second with limits of -96.0 to 96.0. Should I reduce these values to soften shifts or increase them? I've moved them from 0.0 to -4.0 when warm and it didn't seem to make a difference.

[joecar]

Try -15 psi/s.

This table adds to the corresponding shift pressure table, so -15 psi/s will subtract from shift pressure table.

Or, try some different values (-15 psi/s) and see how it behaves.

[ferocity02]

Thanks Joe. I tried -15psi/s and it helped slighly. The shift is overly firm at low throttle (<10% TP) but decent otherwise. I should probably adjust the base pressure first.