dek1581 Posted March 28, 2015 Share Posted March 28, 2015 I saw awhile back where if for instance you want to swap a 707 gas with a 673 diesel (or later maxidyne) you should change the rear end gears. I know the gas revs higher than the diesel. would it matter whether you use an automatic or manual tranny? I'm more interested with top speed (highway) than low-end performance. Quote Link to comment Share on other sites More sharing options...
j hancock Posted March 28, 2015 Share Posted March 28, 2015 Style of transmission wouldn't matter. Look for a ratio such as 3.71, 4.00, or 4.25 for better highway speed for a diesel application with a direct high gear trans. Lower rear gears can work if using an overdrive trans. Quote JimIt doesn't cost anything to pay attention. Link to comment Share on other sites More sharing options...
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