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Thread: 700r4 vs 4l80e vs 400th vs big cam

  1. #1

    700r4 vs 4l80e vs 400th vs big cam

    i have a 37 chevy with a 400 small block and need to buy a transmission i need 3500-4000 stall so i was wondering if i should even be looking at overdrive

  2. #2
    Senior Member RACING JUNKIE oldandtired's Avatar
    Join Date
    Dec 2008
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    Sugar Hill, GA
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    1,368
    I am thinking this is a street car, so everything depends on your rear gear ratio.

    You have a crusing speed (RPM) and a highway speed (RPM).

    A loose converter builds a lot of heat if you do not run enough RPM to get over the stall.

    Dave
    Dave
    http://www.racingjunk.com/profile/343797
    "All that is necessary for the triumph of evil is for good men to do nothing" Edmund Burke

  3. #3
    Senior Member RACING JUNKIE
    Join Date
    Dec 2004
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    austin texas
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    729
    If your running a big gear in the rear a od tranny would help put at highway speed, but if you have a 3.73 or 4.10... i would not be running it in od unless you plan on cruising at 90+ mph on the highway when the convertor is locked at 4g.

    I would try getting a friendlier cam, going with od if you are planning on Highway driving.

    If you just want to play put a 3 speed.


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