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an in-wheel transmission that lifts the drive axle increasing ground clearance, portal axles are used in the unimog as well as in other vehicles. they generally do not raise the axle much, but because of their gear reduction, they allow for a smaller differential case, because there is less strain on the differential
"why is the axle above the center of the wheel?"
"it has portal axles"
by Subliminator January 20, 2010
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