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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
    Sugar Hill, GA
    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.

    "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
    austin texas
    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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