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  1. Maineguy10

    Harsh shift from 1st to 2nd

    Awesome, thanks again hotrod, you were a great help, Lang with everyone else! Hopefully ill be able to pass along some knowledge someday too, good forums are such a great tool!
  2. Maineguy10

    Harsh shift from 1st to 2nd

    So I put a piece of fuel line as a new vacuum line just to see if that would help, and it solved my problem, so I must have pinched the hard line when I reinstalled the tranny, easy fix, I will run a new hard line tomorrow, Thanks for the help!
  3. Maineguy10

    Harsh shift from 1st to 2nd

    Thanks hotrod, I was hoping you would chime in, you seem to know your stuff and I appreciate the detailed explanation, I will try that!
  4. Maineguy10

    Harsh shift from 1st to 2nd

    Maybe I wrote that wrong, it's not so much shifting hard, but has to be high rpm to shift. I had the transmission out to replace the flywheel, and it has been acting this way since I put it back in, I replaced the fluid and filter as well, I have to wait till the morning to get some line to...
  5. Maineguy10

    Harsh shift from 1st to 2nd

    I had someone give it some throttle and I still couldn't feel any vacuum by the tranny, I'm off to replace my hard line now.
  6. Maineguy10

    Harsh shift from 1st to 2nd

    I'm having a very similar problem, my 6.2 w the th400 is shifting really hard from 1-2 and 2-D. I have really good vacuum by the injection pump, but at idle I cannot feel any vacuum at the modulator, which I replaced. With both ends of the vacuum line disconnected I can blow compressed air...

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