Desired shift times...
05-05-2006, 02:01 PM
#1
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Desired shift times... The stock parameters for a 3/4 ton Silverado with the 4L80E tranny are .4 down low and .3 up high (TPS I think....)
Is it safe to drop these to 0? Shifts feel a little sloppy right now, would like to firm them up but I don't want to break anything. Shift pressures are vacuum modulated so I don't have control over those.
Is it safe to drop these to 0? Shifts feel a little sloppy right now, would like to firm them up but I don't want to break anything. Shift pressures are vacuum modulated so I don't have control over those.
05-05-2006, 02:46 PM
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Take about 10~15% out of the desired shift time tables and see if that makes any difference (don't go bellow 0.15~0.2 seconds). Setting desired shift times to "0" disables any kind of adaptive learning the PCM may do for your vehicle's trans and some have reported less than .15 seconds can cause the gears to get crossed up. Since you have such a heavy vehicle though, I wouldn't suggest removing TQ MGT or increasing the trans pressures.
