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Too much stall???

This is a discussion on Too much stall??? within the Automatic Transmission forums, part of the Drivetrain category; I just installed a Vigilante 3200-3400 stall converter with a new, somewhat built up tranny w/ shift kit and 2.73 ...

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    Too much stall???

    I just installed a Vigilante 3200-3400 stall converter with a new, somewhat built up tranny w/ shift kit and 2.73 rear gears (until I find a deal on the 3.73's) Would too much stall with the 2.73 gears cause my tranny to not lock up on the interstate? Is also normal to go from nearly 20 mpg around town to 11 mpg?? I hope the 3.73's help fix this....

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    Senior Member bills98ta's Avatar
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    Ouch... 2.73's... I think the 3.73's will help you a lot !!! Seem a little sluggish with a lot of slippage ? The gear swap is needed soon !

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    member since may 2000 nhraformula's Avatar
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    Quote Originally Posted by johnnybravo View Post
    I just installed a Vigilante 3200-3400 stall converter with a new, somewhat built up tranny w/ shift kit and 2.73 rear gears (until I find a deal on the 3.73's) Would too much stall with the 2.73 gears cause my tranny to not lock up on the interstate? Is also normal to go from nearly 20 mpg around town to 11 mpg?? I hope the 3.73's help fix this....
    did you have the tranny tuned after the install?

    if not, a tuner needs to adjust your shift points and such.
    2000 nhra edition formula
    a few bolt ons, 379 rwhp
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    no I haven't, can any tranny shop do this, or do I need a LS1 pro? the converter locks up rarely on the interstate, but then comes out and my car will rev anywhere from 2000 to 3500 RPM to maintain 72 MPH. would the tune fix this?

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    Senior Member bills98ta's Avatar
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    When it starts to slip, do you pull the shifter into 3'rd to make it lock up again ?

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    Senior Member bills98ta's Avatar
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    When my 4600 starts to slip, I power into it slightly and it will lock up again. I do have 4.10 gears though.

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    most likely this is a tuning issue. Misfires probably need to be desensitized.

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    Quote Originally Posted by johnnybravo View Post
    no I haven't, can any tranny shop do this, or do I need a LS1 pro? the converter locks up rarely on the interstate, but then comes out and my car will rev anywhere from 2000 to 3500 RPM to maintain 72 MPH. would the tune fix this?
    Your problem is too much stall for the stock PCM settings of the transmission.

    Your shift points need adjustment, plus the possible elimination of the torque management system. You should consider a shift kit also.

    These adjustments are made to the PCM, via LS1 edit, HPP3, I do not think most transmission shops can do this.

    Yes you will need to get it tuned on the dyno.

    SteveC

  9. #9
    Veteran 0rion's Avatar
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    a non-locking covertor with an aftermarket convertor is almost always due to misfire counts caused by the new convertor. You can have misfires desensitized to fix that.

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