Q1a drive shaft who has one

Discussion in 'Forced Induction - 5.0L V8 Engine' started by PC 2015, Sep 9, 2019.

  1. PC 2015

    PC 2015 Well-Known Member

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    What up everyone. I have a gforce DS and unfortunately the car vibrates so bad it dont feel safe go down the track. The faster I go the worse it gets. Taking it off and putting the stock back on. Gonna order up a QA1. Trying to see who all here is running a QA1 and if it smooth. Car has a gen5 whipple on making 740whp or so. I want to turn it up so bad. But can't till I get the DS figured out. Thanks for the feedback.
     
  2. Burkey

    Burkey Well-Known Member

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    16 GT, MT 82. Fitted the QA1 a few weeks ago. Absolutely NO dramas whatsoever.
    Having said that, I took the time to REALLY clean the diff flange and I also made sure the angles were more or less perfect.
    My engine was lowered 1/4”. By chance, it worked out that dropping the gearbox crossmember by the same amount gave me something like 1.1* at the U joint and 0.2* at the CV. Total operating angle of 0.9*
    No regrets but I do wish they were a lot cheaper :curse:
     
  3. Black Dog

    Black Dog Looking For Trouble

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    I talked with QA1, Gforce and DSS yesterday. I have a DSS 1 piece DS and vibrations are very intense 60 mph up. All 3 mirrors are useless. QA1 and Gforce both said if I switched to their DS it would probably NOT get any better. QA1 and DSS stated better to go carbon fiber as cuts vibrations way down. They all agree that the 10r80 is hard to control the vibrations.
     
  4. olaosunt

    olaosunt Well-Known Member

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    I have one .
    It’s smooth as butter .
     
  5. Dalton@Evolution

    [email protected] Well-Known Member
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    QA1 is a nice unit!
     
  6. Barrel

    Barrel Hoonigan

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    QA1 CF for my MT82 car. No vibration issues.
     
  7. db252

    db252 Equinsu Ocha

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    QA1 when I had my MT82 and QA1 on with the Tremec. Both have been perfect.
     
  8. gjpundsack

    gjpundsack Well-Known Member

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    QA1 with built 6R80. No problems.
     
  9. AZ18yote

    AZ18yote Well-Known Member

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    #9 AZ18yote, Sep 12, 2019 at 8:08 PM
    Last edited: Sep 13, 2019 at 5:40 AM
    QA1 CF DS on 2018 GT A10. No issues, feels great.
     
  10. OP
    OP
    PC 2015

    PC 2015 Well-Known Member

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    Ordered one will be here Saturday
     
  11. Rothgray

    Rothgray Well-Known Member

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    I have a DSS Shaft as well, and it's an absolute piece of garbage. Vibrates the entire car after 60, gets worse with speed. It's not subtle either. I have no idea how parts makers can get away with building this garbage, and vendors saying "No direct returns".
     
  12. Rothgray

    Rothgray Well-Known Member

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    Who did you order from? Terry Reeves said, there's a long wait on these.
     
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  13. AZ18yote

    AZ18yote Well-Known Member

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    Reports like this kept me away from aluminum ds and led me to QA1 CF. Glad went that direction.
     
  14. AZ18yote

    AZ18yote Well-Known Member

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    Even when Terry mentioned a long wait it still arrived like a week earlier than we thought. That was like May though I believe. Obviously may have changed since.
     
  15. OP
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    PC 2015

    PC 2015 Well-Known Member

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    Beef he had a couple in stock when I ordered mine. My buddy bought one yesterday off him too.
     
  16. Rothgray

    Rothgray Well-Known Member

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    I have no choice but to run one, I'm making nearly 900whp.
     
  17. Curley

    Curley Member

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    I've tried Gforce, DSS and Qa1. They all vibrated on the freeway, tried rotating every position possible. Back to stock, which has me concerned with the blower and sticky mickeys
     
  18. bluebeastsrt

    bluebeastsrt Oh boy

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    I'm boosted. And I vote to keep the stocker. And just use a drive shaft safety loop.
     
  19. NastyPumpkin

    NastyPumpkin Well-Known Member

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    I have the QA1 on my 2018 it is perfect!

    Note: I did have some very minor vibration @100 MPH. So, I clocked it 180 on the pinion end only and the minor vibration was completely gone.
     
  20. OP
    OP
    PC 2015

    PC 2015 Well-Known Member

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    #20 PC 2015, Sep 13, 2019 at 8:04 PM
    Last edited: Sep 13, 2019 at 8:25 PM
    Did you clock the pinion only or the pinion and the spacer
     
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