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3800 rpm in 5th gear @ 60mph?

Posted by dave_nz, Sep 22, 2020

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  1. dave_nz

    dave_nz Proven Member

    55
    14
    Joined Feb 3, 2012
    Oamaru, New Zealand
    Hi there,
    Have just put my car back together. I blew the centre diff out of my last gearbox so I found a replacement that was out of a drag evo (we have evo 1-3 here in NZ) with a welded centre.

    All is fine and everything works - however the revs seem way higher than what they should be.

    I confirmed with the previous owner that the box was a 3.545 output when used with a evo 1-2 transfer case. (1.09)

    Car has a 3.545 rear diff.

    However check this out:

    bkah.png
    You can see from the log where engine speed is up the top, that I've changed into 5th gear and sitting at 3800rpm. Speed is at the bottom, you can see I'm doing 104kmh which is approx 60mph.

    How is this possible? I've never seen ratios like this. I've confirmed the speed is correct with gps on my phone. I would like to verify rpm but I can't see how they can be wrong - the car drives normally.
     

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  2. pauleyman

    pauleyman DSM Wiseman

    5,979
    1,397
    Joined Nov 19, 2011
    oklahoma city, Oklahoma
    change to the 5th from your old unit unless it was destroyed.
     

    Street Build 3K  1

    1997 Eagle Talon TSi AWD
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    lglracer and Bud92gsx like this.

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