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  1. #1

    Default Suburban Trans Problem, skips second gear

    Hi guys,

    I have a 02 Suburban that has developed a transmission problem while I was driving on the Highway. It was stuck in 3rd and not going into 4th.
    Now when I take off from the lights it stays in first until I reach 20mph and jumps straight into 3rd. Its Not changing into 2nd.
    The trans fluid was low and has been topped up but made no difference.
    Anyone have any ideas?

  2. #2

    Default

    The 4L60e trans uses shift solenoids to move through the gears. There are 2 solenoids, different combinations of each being operated, or released (by the PCM and the valve body), changes the gear.

    I suspect one, or both, may be dirty. I would change the fluid and while pan is off, drop the valve body and clean it.
    Ray

    '09 Avalanche LTZ - Black
    '05 Envoy XL (sold)

  3. #3

    Default

    Quote Originally Posted by RayVoy View Post
    The 4L60e trans uses shift solenoids to move through the gears. There are 2 solenoids, different combinations of each being operated, or released (by the PCM and the valve body), changes the gear.

    I suspect one, or both, may be dirty. I would change the fluid and while pan is off, drop the valve body and clean it.
    Thanks for your prompt reply.
    Gives me a great place to start.
    I'll let you know how I get on.

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