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Converter problem or what.

This is a discussion on Converter problem or what. within the Automatic Transmission forums, part of the Drivetrain category; No flaming on products please. I have 3400 stall FUDDLE 2.1 STR And a few questions I hope somebody can ...

  1. #1
    Junior Member TAT MAN's Avatar
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    Question Converter problem or what.

    No flaming on products please.


    I have 3400 stall FUDDLE 2.1 STR
    And a few questions I hope somebody can answer

    1. naturallay asprirated, driving at 70mph in drive, not over-drive it bounces of rev limiter. when I floor it.
    2. at the track with 125 shot. it wont shift in to 3rd just bounces off rev limiter. I even let off the peddle when it hits rev-limiter, still wont shift. 11.9 1/4 mile, even with hitting rev-limiter
    at the track, no NOS I get 12.33 1/4 mile and never hits rev limiter
    3. going at 70 mph in over-drive I floor it with 125 shot, and bounces off the rev-limiter, like right now.
    I had converter installed by a sponsor, had torque management set, and dyno tune. prior to getting NOS.
    Does it sound like converter problem?
    I have a window switch, but not installed yet.
    I have a toggle switch for NOS, and shutting it off prior to shift, sometimes takes care of problem.

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    Member performabuilt's Avatar
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    no 2-3 shift is either a tune program issue or a 3-4 clutch issue . A 4l60e can only do whats comanded , first i would get someone to look at data stream and see it the shift is comanded if its comanded its a transmission issue if its not its a program issue
    performabuilt

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    Senior Member mrr23's Avatar
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    both my cars had that problem when they were stock trans. i took my vinci handheld and firmed the shift and the problem went away.

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    Junior Member TAT MAN's Avatar
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    Thanks . I'm thinking of ordering a programer, maybe a Predator

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    King 0f n00bz shady milkman's Avatar
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    when you installed the converter did you do any type of tuning to it? also you should get a shift kit. I would try that first..but you deff need to lift the shift points when you install a converter.
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  6. #6
    Veteran 0rion's Avatar
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    most likely a tuning issue

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    Junior Member MNR-0's Avatar
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    Lower shift points at WOT, increase line pressure. If its a stock tranny, get a shift kit.

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    King 0f n00bz shady milkman's Avatar
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    blacker than wesleysnipes
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    Quote Originally Posted by MNR-0 View Post
    Lower shift points at WOT, increase line pressure. If its a stock tranny, get a shift kit.
    maybe i'm just having a brain fart..but don't you want higher shift points, and a raised rev limiter or i might just be backwards

  9. #9
    Veteran 0rion's Avatar
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    Quote Originally Posted by shady milkman View Post
    maybe i'm just having a brain fart..but don't you want higher shift points, and a raised rev limiter or i might just be backwards
    that really depends on where he wants to shift at. If he's banging the limiter and don't wanna bump it up then I would back the shift points down a tad. I personally use MPH to adjust the 1-2 shift points and RPM to adjust the 2-3 3-4.

  10. #10
    Nitrous Tuner LS2Tuner's Avatar
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    Yeah it sounds more like command problems from ecu.......I picked up a couple of tenths by lowering shift points while on the bottle.I would have a "Good Tuner" get in there and check out your pids while driving.
    Don't be afraid of the bottle!!! Be afraid of your tune!!!

  11. #11
    Junior Member MNR-0's Avatar
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    Quote Originally Posted by shady milkman View Post
    maybe i'm just having a brain fart..but don't you want higher shift points, and a raised rev limiter or i might just be backwards
    No. You have to remember the increased torque offered by NOS is greatly flaring the converter by as much as 3-500RPM. If the shift points are setup for NA just short of the rev limiter then you will hit fuel cutoff every time. Either back off the MPH and shift RPM or raise the rev limiter. Increasing line pressure will (up to a point) offer more control over shift RPM too.

  12. #12
    Grand Imperial Wizard Sarge's Avatar
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    Retired Outlaw Sum Bitch

    TransGo Shift Kit

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    Nitrous Tuner LS2Tuner's Avatar
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    Quote Originally Posted by Sarge View Post
    TransGo Shift Kit

    Trans-Go is the way to go!!!!

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