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4t60-E looking for 3.73 final drive ratio

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  • 4t60-E looking for 3.73 final drive ratio

    I read about changing the sprockets on these transmissions to get a lower gear. I am having trouble finding the sprockets. I trans parts salesman told me the 4t60-e and 4t65-e were almost the same so I bought those 33/37 sprockets but the driven didn't fit right.

    I have a 4t60-e 33t drive sprocket, but having problems finding the 37t driven.

    Anyone know where I could easily find one of these? I may be interested in buying several sets...

  • #2
    Many transmissions in the yard have these gears and probably they most cost effective place to find them. 60e to 65e yes the driven is different because of the different 4th clutch support.

    You could check out wittrans for their catalog and see if they have the pn listed or even some available because they do sell new/used hard parts.

    Got Lope?
    3500 Build, Comp XFI Cam 218/230 .050 dur .570/.568 lift 113LSA
    Fully Balanced, Ported, 3 Angle Valve Job, 65mm TCE TB, S&S Headers.
    Stage-1 Raybestos/Alto 4t60e-HD, EP LSD, 3.69FDR
    12.61@105 Epping NH Oct 2015 Nitrous 100shot (melted plugs) 13.58@98.8 N/A 3200LBS

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    • #3
      wittrans is where I got the 33t drive sprocket. They did not have the 37t available. I gave them the trans code for a 94-96 W body that came with the 3.4 DOHC that has the 33/37 gears so they could keep an eye out for one. My most local yard does not have a trans with one, and haven't been to any other yards yet, even though there are 3-4 big ones within an hours drive. I was looking for the easy route first, just buying on the 'net already pulled.

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      • #4
        If you can source the pn from GM I'm sure you can find it somewhere.

        Got Lope?
        3500 Build, Comp XFI Cam 218/230 .050 dur .570/.568 lift 113LSA
        Fully Balanced, Ported, 3 Angle Valve Job, 65mm TCE TB, S&S Headers.
        Stage-1 Raybestos/Alto 4t60e-HD, EP LSD, 3.69FDR
        12.61@105 Epping NH Oct 2015 Nitrous 100shot (melted plugs) 13.58@98.8 N/A 3200LBS

        Comment

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