How Do I Tame a Cold 1-2 Shift ?

[2therock]

I have experimented a little but with no success in getting my 1-2 to shift tamer when the trans is not warmed up.

Any suggestions?

[MNR-0]

6 speed or 4 speed?

[2therock]

6 speed or 4 speed?

4 speed auto 4L65e.

Thanks

[gman4dx266]

Not sure if you have it in your file but try looking at "Shift pressure modifier Upshift" You can use either the 1>2 box or the "pressure multiplier" box. The pressure mult is usually filled with 1 (1 times anything=no change). You could like take that to .75 or .85 in the temperature cells where the problem is.

But like I said Im not sure if you have that option.

[2therock]

Thanks,

Here is what I have in the pressure multiplier. What do you think?

[HawkZ28]

Is that the stock settings?

[MNR-0]

Nope. Stock is 0.85

But I don't think that will fix his problem. What we need is load referenced line pressure - something these PCMs just don't support

You can have the right shift pressure for WOT, but you will also see that torque on the upward slide of the torque curve - so it makes light throttle harsh

The later 6 speeds have much more control over this

[2therock]

Yes OE it is 0.85, the 0.50 was my experiment. It's back at 0.85 now.
What about the table below?
Is this the load referenced line pressure speak of?

[MNR-0]

No - that's not load referenced

A VE - RPM map of line pressures is what Im talking about

[HawkZ28]

THANKS for clarifying- I assumed the one he posted was load referenced too due to the torque value.