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Gentlemen,
The speedometer sensor is driven by a gear on the passenger side of the front differential.
The amount of rotations of the gear is determined by the tire diameter, and the coefficent of friction, of the tire, controling the amount of rotations, of the axles, in relationship to the ring gear.
THE INTERNAL GEAR RATIOS HAVE NOTHING TO DO WITH THE SPEEDOMETER ACCURACY!
It is only the sensor accuracy, the speedometer accuracy, the wireing, tire diameter, and the ability of the splined shafts to transfer power, that can show inaccuracies!
That said, I would "be really interested" in joeaxial's new transmission # on the bell housing, by the starter.
If the trans came from a 1996 2.5 Legacy, then it should be a 4.44 ratio trans, and his 72 mph at 3000 rpm is correct.
If the trans is a 4.111, and the rpm is 3000 at 72, rather than 77 mph, there is some problem, like its not locking up the torque converter?
Think about this, in first, second, third and forth, the speedometer reads the speed of the car, without reguard to the gears inside the transmission unit.
The reason for this is, it only reads the speed/rotations of the front ring gear.
All cars to some degree have a speedometer error.
The internal ratios are not a factor. Tom
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