Quote:
Originally Posted by 24601
I haven't been able to find anything concrete in regards to converter lockup rpm, but I can tell you that it's occurring between 40-45 mph with my current setup (3.55) and civilian model Crown Vics came with 2.73s standard.
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Well I guess that should pretty much answer that question!
I know there's a trillion variables, but in the world of putting bigger tires on a truck/Jeep without regearing people often run into the situation where convertor lock up doesn't happen until too high of a speed. Gearing for more rpm often helps highway mileage, as now they aren't turning power straight to heat in the converter. Not to mention helping transmission life and power/accel. There is such thing as too little gear. But if civil one's came with 2.73's than it should be perfectly doable.
Might not be too hard to find someone with a panther chassis that wants 3.55's that you could swap rear axles with.