Hard shift from 1st to 2nd od light flashing

Discussion in 'Drivetrain Tech' started by Rebel, Mar 19, 2018.

  1. Rebel

    Rebel New Member

    Hey guys, got a problem with 2002 ranger 4x4 4.0 v6. On start up does just fine, then get up to about 55 mph od light starts flashing and at that point shifts hard from 1st to 2nd. Every thing else is fine. I can shut off for a short time and restart everything fine again until I get back up to speed then od light comes on again with same problem. Any help would be appreciated. Thanks in advance.
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  3. mhoward

    mhoward Member

    Hello Rebel and welcome to the forum! I did a quick Google search and it appears there are various things that can cause that behavior. Could be as simple as changing the fluid and filter all the way to a full rebuild. Best bet would be to take it to a transmission shop (yeah, I know how expensive that can be).
    DeanMk likes this.
  4. Dchad53

    Dchad53 Member

    I'm curious too. I got on an on ramp a couple of weeks ago and the same thing happened. No overdrive.
    The OD light flashing. I pulled over and tried to get it to change. Nothing worked until I shut it off to get
    gas. When I started it back up all was fine. Hasn't happened since.
  5. OP

    Rebel New Member

    Thanks for the info. I may try changing the two speed sensors first before taking to the shop. I was told that could cause these symptoms. Hope for the best. GOD bless.
    Last edited: Mar 20, 2018
  6. mhoward

    mhoward Member

    Good luck!
    Rebel likes this.
  7. OP

    Rebel New Member

    Update on my problem, I replaced both sensors on tranny, that is the out put and the input. Also added a little Lucas to tranny, and problem went away. Hope this may help someone else. Thanks guys and GOD bless!!!
    DeanMk likes this.
  8. mhoward

    mhoward Member

    Good deal, Rebel! :)
  9. DeanMk

    DeanMk Member

    Thanks for resolving this one, Rebel. Much appreciated.
  10. OP

    Rebel New Member

  11. OP

    Rebel New Member


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