07-12-2010, 04:06 AM
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#12
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Registered Member
Join Date: Nov 2006
Posts: 1,027
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I agree that if the ratios are the same and the driver is educated, the manual trans will beat the auto trans- especially out on the highway.
The drag that reduces the efficiency of all auto transmissions (even when the torque converter is locked up on the highway) is the requirement to be pumping trans fluid all the time- it has to be maintaining a certain pressure on the clutch packs/bands or they will slip.
It takes some energy just to keep everything pressurized - a manual trans doesn't have this energy requirement.
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