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Originally Posted by AccordCodger
Well, not really. It means the transmission output is moving faster than the input. What the final drive ratio does is something else altogether.
FYI, I don't know about earlier models, but the current Accord's 5th AND 4th are overdrive ratios (probably because the latest motor is a little larger).
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I just checked the gear ratios and you're right, on the 7th gen (03+) 4cyl Accords both 4th and 5th gear are can be used as overdrive cause the ratio is lower than 1
Transmission Print This Page
5-speed manual w/OD
Specifications
Transmission gear ratio (1st) 3.27
Transmission gear ratio (2nd) 1.77
Transmission gear ratio (3rd) 1.15
Transmission gear ratio (4th) .87
Transmission gear ratio (5th) .66
Transmission gear ratio (reverse) 3.58
With the 6th gen Accord (98-02) it's basically the same, just 4th gear isn't as low
Transmission Print This Page
5-speed manual w/OD
Specifications
Transmission gear ratio (1st) 3.28
Transmission gear ratio (2nd) 1.80
Transmission gear ratio (3rd) 1.19
Transmission gear ratio (4th) 0.90
Transmission gear ratio (5th) 0.68
Transmission gear ratio (reverse) 3
And here's what they say about overdrive, so I guess we're both right
Overdrive
An overdrive transmission has a final gear ratio that is less than 1:1. This means the drive shaft turns faster than the engine crankshaft, permitting the vehicle to maintain a constant speed at lower RPM. At highway speeds an engine runs quieter and consumes less fuel when overdrive is engaged.
Primary Benefit:
Overdrive improves highway fuel economy. In an era of government-mandated fuel economy, the advantage of overdrive is so overwhelming that almost all manual and automatic transmissions incorporate one or more overdrive gears.