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Old 05-10-2015, 11:54 AM   #6
wheelbender6   wheelbender6 is offline
 
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Join Date: Mar 2010
Location: Houston area
Posts: 945
Automatic Transmission fluid is basically hydraulic fluid. An auto transmission contains a hydraulic pump, so that the fluid can actuate different parts of the transmission. Auto transmission fluid is only able to adequately lubricate drive gears when placed under pressure by the hydraulic pump. That is why an auto transmission will very quickly wear out if the hydraulic pump goes bad or the seals wear out.
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