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    Allison 6sp: P0700 after trans go Jr install.

    Thank you for the help . I'll drive it awhile and see how it does.
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    Allison 6sp: P0700 after trans go Jr install.

    With my PPE tuner . It has a trans reset feature on it. After driving it for awhile today 1st to 2nd shifts good 2nd to 3rd good but 4th to 5th shifts hard and the down shift is still very hard. Could that be a sticky solenoid? Its not throwing any codes though witch I would think it would if...
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    Allison 6sp: P0700 after trans go Jr install.

    I pulled the pan and found a plug had not been plugged in all the way. I cleared the code and its shifting but now it down shifts so hard it breaks the back tires loose sometimes specially when in tow mode. Any ideas ? I did reset the trans but it didn't help.
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    Allison 6sp: P0700 after trans go Jr install.

    Yes it's showing a 0700 code. It looked very clean and cleaned it all with brake clean. It doesn't drop hard into drive it just seams like it starts in 3rd and doesn't shift. It only drops hard into revers. it worked perfectly before I installed the trans go jr.
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    Allison 6sp: P0700 after trans go Jr install.

    I just finished installing my trans go jr kit and have the exact same problem. It drops hard into revers and i believe it to be stuck in 3rd when in drive . How did you determine it was a broken wire?