Torque Converter Guidence?

I've read that some converters don't like the freeway.

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that is true with cheap 1970 technology converters. modern converter technology has come a long way. can have the best of both worlds these days..

you need to know for sure the gear ratio. should be a little tab on the rear that tells you. you jack it up and count the revolutions of the driveshaft when when turning the wheel one rotation.