The Ford Barn

tomrobson · 08-28-2012, 02:36 PM

I have the above 48 pick up it has a 4speed trans . The gas milage is bad. Im trying to figure out how to reduce the RPM.In looking at manuals I see the std 3speed trans is supposed to have a 3.73 rear end. The question is mine being a 4speed does this change therear end and make this truck an F2. the rear end does have some numbers on it they are a pat #1868618 and on the other side 18423 can any one out there help me identify this rear end ? And perhaps suggest how I can chang something to reduce the RPM? Thank You

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08-28-2012, 02:36 PM	#1
tomrobson Junior Member Join Date: Apr 2011 Location: shawnee ks Posts: 8	1948 ford pick up I have the above 48 pick up it has a 4speed trans . The gas milage is bad. Im trying to figure out how to reduce the RPM.In looking at manuals I see the std 3speed trans is supposed to have a 3.73 rear end. The question is mine being a 4speed does this change therear end and make this truck an F2. the rear end does have some numbers on it they are a pat #1868618 and on the other side 18423 can any one out there help me identify this rear end ? And perhaps suggest how I can chang something to reduce the RPM? Thank You