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Thread: Converter unlocking @ 5500rpm under wot?????

  1. #1
    Potential Tuner
    Join Date
    Jul 2009
    Posts
    4

    Angry Converter unlocking @ 5500rpm under wot?????

    The car is a 2000 Pontiac Ram-air, it has a 408ci, patriot stage 3 heads, Texas Speed Giant Stick cam, Fast 90 intake and 90tb, custom 4in maf we built, 4L60E trans with a Precision Industries Converter. Ok Ok I have the car running and driving great, wot is perfect but on the dyno and street the converter @ 5500rpm just come unlocked. Im trying to figure out if I missed something in the tune before I pull the trans and send the converter back. The car made 480rwhp @ 5500rpm when the converter comes unlocked, and the pull is straight up until then so I know this thing is goona make some decent numbers. Let me know if you see anything. Thanks for any help you can provide.

  2. #2
    Tuner in Training BAIN's Avatar
    Join Date
    Feb 2006
    Posts
    37
    The transmission isn't supposed to lock up under WOT. You have to lock it through the scanner during the dyno run if you want locked #'s.
    Last edited by BAIN; 09-16-2009 at 07:33 PM.
    Pewter 2000 SS A4
    T-Rex Cam (242/248), Hooker LT's, 3" X-pipe Duals, Fast 90, NW 90mm TB, Yank PT4800, 4.30 gear, etc....
    Black 08 C6 A6 Z51
    Mostly stock

  3. #3
    Senior Tuner
    Join Date
    Nov 2002
    Location
    Central Florida
    Posts
    2,503
    Are you sure it has unlocked? If so, can you see if it
    is a misfire response (--3-- in the logs for TCC Mode)?
    Or is there a chance that you have simply hit peak
    torque and overcome the TCC static friction limit?

    Since it does it on the street you should be able to
    log TCC Mode and see (in the table view at least)
    whether it says Locked, Unlocked or --3-- which will
    point the finger somewhat.