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40cpe · 11-09-2019, 11:02 AM

We have gotten used to modern cars and low RPM cruising. My '55 has a 3.25 8" rear. At 60 in direct drive it sounds like it needs another gear and it is only turning 2500 RPM. With a 3.73 rear your car should cruise 60 easily. Maybe if you have an aggressive cooling fan it is creating the abnormal sound. I agree with others above, the only way to get comfortable freeway speeds is with an overdrive or an abnormally high rear gear.

11-09-2019, 11:02 AM	#10
40cpe Senior Member Join Date: May 2010 Location: Star, MS Posts: 4,024	Re: proper gearing We have gotten used to modern cars and low RPM cruising. My '55 has a 3.25 8" rear. At 60 in direct drive it sounds like it needs another gear and it is only turning 2500 RPM. With a 3.73 rear your car should cruise 60 easily. Maybe if you have an aggressive cooling fan it is creating the abnormal sound. I agree with others above, the only way to get comfortable freeway speeds is with an overdrive or an abnormally high rear gear.