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Jeremy Crutcher Posted on Mar 18, 2015
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My 2006 buick lacrosse cxl Stuck in first gear wont shift and no DTC appear

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  • 1 more comment 
  • Jeremy Crutcher
    Jeremy Crutcher Mar 19, 2015

    I did a trans flush no change...Read a buliten about a dirty MAF sensor that could cause same issues I cleaned it , no change, I started the car with the air box off and MAF off and disconected and still ran fine with no codes... No comunication???? any ideas

  • Meg McNutt
    Meg McNutt Jun 03, 2019

    How did you solve this problem?

  • Meg McNutt
    Meg McNutt Jun 03, 2019

    How did you solve this problem?

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3 Answers

Jeff Armer

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  • Buick Master 15,575 Answers
  • Posted on Mar 18, 2015
Jeff Armer
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Can you shift through the gears manually ?

  • 1 more comment 
  • Jeremy Crutcher
    Jeremy Crutcher Mar 18, 2015

    I CAN SHIFT THROUGH THEM BUT IT WILL STAY IN 1ST

  • Jeff Armer Mar 18, 2015

    It's not in limp mode as this other person suggests ! It's more then likely

    The 1-2 shift valve (318) is stuck or binding.


    How many miles on the unit ? ever have a tranny service done ?


    First Gear Only




    Checks



    Cause



    DEFINITION: The transmission only provides first gear in Drive range. The vehicle accelerates from a stop in first gear and does not upshift. First gear ratio is 2.921:1.



    Control Valve Body Assembly







    ?€¢





    The 1-2 shift valve (318) is stuck or binding.














    ?€¢





    Debris is found in the control valve body (301) or the control valve body spacer plate and gasket assembly (396)














    ?€¢





    The spacer plate and gaskets (369-371) are misassembled.







    Second Clutch Assembly







    ?€¢





    A missing or not seated second clutch backing plate retaining ring (627)














    ?€¢





    A missing or misassembled second clutch backing plate (626)














    ?€¢





    Worn, damaged, or misassembled clutch plates (623-625)














    ?€¢





    A missing or not seated second clutch spring retaining ring (622)














    ?€¢





    A damaged spring assembly (621) or piston (620)














    ?€¢





    A missing or damaged second clutch housing ball check valve assembly (618)














    ?€¢





    A damaged second clutch housing assembly (617)







    Reverse Reaction Drum



    Damaged splines of the reverse reaction drum (669)




    How


    ?€¢
    Debris is found in the control valve body (301) or the control valve body spacer plate and gasket assembly (396)


    ?€¢
    The spacer plate and gaskets (369-371) are misassembled.

    Second Clutch Assembly
    ?€¢
    A missing or not seated second clutch backing plate retaining ring (627)


    ?€¢
    A missing or misassembled second clutch backing plate (626)


    ?€¢
    Worn, damaged, or misassembled clutch plates (623-625)


    ?€¢
    A missing or not seated second clutch spring retaining ring (622)


    ?€¢
    A damaged spring assembly (621) or piston (620)


    ?€¢
    A missing or damaged second clutch housing ball check valve assembly (618)


    ?€¢
    A damaged second clutch housing assembly (617)

    Reverse Reaction Drum
    Damaged splines of the reverse reaction drum (669)

    How

  • Jeremy Crutcher
    Jeremy Crutcher Mar 18, 2015

    140000 MILES DOING A FLUSH ON IT NOW...

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Dennis Hanks Sr.

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  • Contributor 21 Answers
  • Posted on Mar 18, 2015
Dennis Hanks Sr.
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If there is no DTC codes. Take it to a shop and have them disconnect 1 of the transmission lines to check the PSI. If good more than likely the valve body is no good. Need trans. Try 1 thing before you do any of the above. Disconnect your negative post on your battery. Let sit for 5 min and hook back up and drive

Testimonial: "I will try and let you know"

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  • Expert 333 Answers
  • Posted on Mar 18, 2015
spy1309
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Your transmission is stuck in the so called limp mode to protect the transmission against further damage, take the car to a repair shop or dealer for further testing

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