front end shakes badly at 40 miles per hour on 1993 Ford F-350

shakes badly at 40 miles per hour, if i speed up or slow down it stops, all the time

by in Garden Grove, CA on March 18, 2010
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4 answers
ANSWER by , March 18, 2010
If this isn't a dually have the tires rotated and balanced as a out of balance tire will always come in and out of balance at a certain MPH, Then if it persists you've eliminated that possibility and have the tie rods and suspension checked
ANSWER by , July 20, 2010
check the sway bar busshing or the track bar busshings
ANSWER by , August 02, 2010
try changing your tirod ending i did that in my dually and it drive fine now if you let it go it will destroy your ball joints
ANSWER by , November 03, 2010
check your front shocks, it will cause the same thing.