[>:]My 98' Discovery front end vibrates/bounces like crazy when hit bumps on highway going faster than 50mph... Will stop only if slow down. Dealer has no idea why - many expensive ideas but won't guarantee fixing the problem. HELP

 

hi, i listed most likly first
could be steering shock test,
could be pan hard rod bushings
also could be swivel ball or ***** worn
and rare but i have seen in high milage rovers
that the radius arm bushings worn out can cause
this osalation at highway speeds

 

How many miles on your truck, have you replaced your shocks and or coils yet, how about the steering stabilizer?