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replaced th400 know speedometer is off

Home Forums Stay Dirty Lounge Service and Repair Questions Answered Here replaced th400 know speedometer is off

This topic contains 1 reply, has 2 voices, and was last updated by Nightflyr * Richard Kirshy 4 weeks ago.

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  • #987794
    wesley pyburn
    wesley
    Participant

    i replace my th 400 in my 1989 gmc r3500 with one i rebuilt and now my speedometer is off.should i take the speedometer gears off the old one and install them on the new one?

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  • #987809
    Nightflyr *
    Richard Kirshy
    Participant

    You could count the teeth to see if they match or not.
    If they do, it is possible the replacement transmission has different gearing than the original.

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