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Thread: This is for 08 models only

  1. #11
    Moderator wreckwriter's Avatar
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    Quote Originally Posted by SRG963 View Post
    Very Interesting

    GMC: FLARE AND OR HARSH 2-3 SHIFTS. THIS CONDITION MAY BE CAUSED BY LEAKING 1-2-3-4 AND 3-5-R CLUTCH FLUID SEAL RINGS (230). MODELS CADILLACS, CHEVROLETS, GMC, HUMMERS, PONTIACS. EQUIPPED WITH 6L80 (RPO MYC) OR 6L90 (RPO MYD) AUTOMATIC TRANSMISSION. *PE
    Mine will sometimes flare a bit if cold. Goes away when things warm up though.

  2. #12
    VIP Member GXPaycheck's Avatar
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    Could someone define "flare" for us dummies?
    RIP Charlie, The GRRRR8 One


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  3. #13
    Addicted Member PantherGTBlack's Avatar
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    Flare is when the RPMs increase during an upshift. Say the car revs to 2200 goes to shift and continues to rev to 2500 before it finally completes the upshift into the next gear. It is not normal for it to happen with the transmission is up to temperature but will do it sometimes in very cold weather due to the fluid become more viscous(thicker) due to the cold temperatures...My allison tranny in my duramax would do this after a cold night of setting outside and once it would get the fluids moving it would be fine...the allison also would flare shifts when I ran a 350hp PPE tune also...
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  4. #14
    Beyond Help Panzer Leader's Avatar
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    Quote Originally Posted by SRG963 View Post
    Very Interesting

    GMC: FLARE AND OR HARSH 2-3 SHIFTS. THIS CONDITION MAY BE CAUSED BY LEAKING 1-2-3-4 AND 3-5-R CLUTCH FLUID SEAL RINGS (230). MODELS CADILLACS, CHEVROLETS, GMC, HUMMERS, PONTIACS. EQUIPPED WITH 6L80 (RPO MYC) OR 6L90 (RPO MYD) AUTOMATIC TRANSMISSION. *PE
    How would one tell what type transmission that they have in their car. Understand that the GT has 6 spd auto and the base g8 has a 5 spd auto. This post seems to imply that it is the 5 spd but then again?
    Old Retiree in a Infiniti

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  5. #15
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    6L80 is the 6speed auto in G8s

    http://en.wikipedia.org/wiki/GM_6L80_transmission
    Last edited by Jastheace; 04-21-2009 at 05:52 PM. Reason: added link

  6. #16
    Junior Member scratch1275's Avatar
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    If you have a VMS TCM tune, will the dealer make the necessary repairs? Mine does this even in warm temperatures. Only time it doesn't do it is under moderate to full throttle accelaration.
    BTW, my G8 is a 2009 with 18k miles on it. Seems to be (very slowly) getting worse.

  7. #17
    Cool Person Wannabee GotMyG8V8's Avatar
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    If you pop your hood, and look at the manufacture plate which is on your driverside behind the air box mounted on the body where the strut is, then you can see the transmission code you have
    2008 G8 GT Panther Black Metallic - Premium and Sport package
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