Question about 1990 GMC Suburban

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Grinding, 1990 suburban

When you put the truck in gear it has a medium grinding noise reverse and drive gears. sounds like its coming from the rear of the engine.

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  • dragonstalke
    dragonstalke Jan 23, 2009

    he hit a V-ditch and the sound is coming from between the engine and the flywheel

  • dragonstalke
    dragonstalke Jan 23, 2009

    it starts fine and goes into gears fine

  • dragonstalke
    dragonstalke Jan 23, 2009

    i took the shroud off already, the sound is just at the rear of the motor.

  • dragonstalke
    dragonstalke Jan 23, 2009

    i'll ck there thx

  • dragonstalke
    dragonstalke Jan 23, 2009

    comon over lol jk thx

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  • Master
  • 1,990 Answers

This could be 1 of 2 Things. Either the Transmission needs Service REALLY Badly or you have a Tooth Broken off of the Gears in the Rear End.

Posted on Jan 23, 2009

  • 2 more comments 
  • Travis Humphries
    Travis Humphries Jan 23, 2009

    It could have caused the Casing between the Tranny and Motor to come loose. There is a Shroud in between these that can come loose. It starts OK Right????

  • Travis Humphries
    Travis Humphries Jan 23, 2009

    Then it is the Housing in Between the Motor and the Tranny. This can be a Little tough to Repair. You just need to be Patient and it will bolt back on.

  • Travis Humphries
    Travis Humphries Jan 23, 2009

    No Problem. At this point it is a Trial and error job and is REALLY hard to Diagnose unless I am right there with you.

  • Travis Humphries
    Travis Humphries Jan 23, 2009

    I would But, I doubt that you are in Oklahoma Right?!?!?! LOL

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Bulletin No.: 03-07-29-004G
Date: December 15, 2010
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