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Thread: 4l60E 4th shift pressure 96PSI

  1. #1
    Lifetime Member HellKnightHicks's Avatar
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    Default 4l60E 4th shift pressure 96PSI

    Is it safe to run 96PSI on the forth gear shift?

    3>4

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    07 Tahoe has 3-4 shift at 90 psi 0 torque reduction 0.0 for the shift time, the force motor current tables are slightly different.

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    Lifetime Member HellKnightHicks's Avatar
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    I had mine set to 96psi before with a crappy a$$ junk yard tranny in it..

    I have 5 pinion planiteries and all that good stuff now.

    Sonnex 4th Billet Servo, Vett 1-2
    HD2 All washers installed. ....

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    WHen I get home tonight I Will post up the factory tune out of the Tahoe the pressures look like a good starting point most of the shift times are very long under part throttle and get quicker under hard trottle. I prefer all 0s or .2 if it shifts to hard and then. Then you have to play give and take with the pressures and TM. I'm no professional by any means proceed with caution. Posting from my phone sorry

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    Lifetime Member HellKnightHicks's Avatar
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    I get confused over reducing shift times to .2 or 0.0 Mine are 0.0 right now. Why .2

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    .0 makes it shifts as quick as mechanically possible or the way the shift kit is designed. If it feels good and solid but not abrupt leave it. You can add time to the lighter throttle areas and make it more cadillac like for dd or if your wife wants to drive

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    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by HellKnightHicks View Post
    Is it safe to run 96PSI on the forth gear shift?

    3>4
    Ramp it up from 0 psi @ 0 ftlb to 96 psi @ ~300 ftlb, and then level out at 96 psi.

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    Joe (Moderator) joecar's Avatar
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    Shift kit: set shift times to 0, this prevents the PCM from correcting the shift times programmed in by the 4L60E-HD2 kit.

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    Lifetime Member HellKnightHicks's Avatar
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    Is there a reason that we have to start at 0.0

    I like to feel the engagement of the gear even when my foot is not on the pedal

  10. #10
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by HellKnightHicks View Post
    Is there a reason that we have to start at 0.0

    I like to feel the engagement of the gear even when my foot is not on the pedal
    No, no reason... you can start with say 10 psi and fine tune.

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