FLOOR BOUNCES UNDER DRIVERS SEAT/ NOT SEVERE , BUT LIKE AN OUT OF ROUND TIRE

1999 Ford F-150

Tiny

ron moncol

November, 29, 2011 AT 1:48 AM

4x4 auto trans. At about 42 -47 m.P.H. The floor bounces in 2wd mode /not noticed in 4wd mode = started at around 60,000 miles. We have replaced tires and wheels / u joints / rear end lube with synthetic grease / lubed the drive shaft slip yoke with Ford lube / multiple tire balances / a couple of alignments / putting several hundred pounds in bed. Only acts up at 42-47 mph whether under load or coasting = up or down hill = in drive or neutral. Ford techs say they "have run out of ideas " and there are no service bulletins for the 4wd

FOUND 246 RELATED QUESTIONS

1 Answer

Tiny

Jacobandnickolas

November, 29, 2011 AT 2:11 AM

There are no TSB on this. Did they check the wheels and u-joints?

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