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Originally Posted by TR
You've nailed it down dead-on. Time was, 3.55's were once universally considered an all-around good compromise between highway cruising and max acceleration. A good gear that a musclecar owner can live with in daily life.
Fast forward to having owned OD equipped cars since '85. Having our cake and eating it too. I put 4.10's in my 6-speed '94 Z28 and still turn barely 2000 RPM's @ 70 MPH. I drive my '70 Judge with 3.55's, and even around town at 45-50 MPH, I still instinctively attempt to shift it out of 4th into a non-existant 5th. Can't believe we used to consider this a compromise gear. A RA IV w/4.33's would be near insane on the highway.
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LOL! Yep, I've looked for that "5th gear" before too.
I would agree with the above and add that I have a close ratio 4spd and 2.73's in my '74 TA and I like the combo generally. Better would be a 5spd with an od 5th and 3.55's BUT I didn't have the cash for the 5spd. I turn about 2,300 on the highway at 70mph and it sure helps the mileage. I have a healthy 462 in it and it's getting 19mpg on the highway if I haven't got my foot in it and that's the hard part.
The only thing I don't like about it is reverse in tight parking spots because reverse uses 2nd and it loads up if you have to do much backing or there is a hill etc.