well i guess that means the both 4th & 5th are geared lower than 1:1, for these models.
Overdrive is basically any gear witha ratio lower than 1:1.
i.e at 1:1 ration for one rotation of the crank the wheels(driveshaft actually) should turn once,
in overdrive they turn 1.x times
Of course this is not taking into account differetial ratios etc.
before people come eatin my head.
Hope that sorts it out
Of Course
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