1983 533i 149,000 miles
severe front end side to side shudder, usually begins @ 40mph, worsens considerably
by 45mph-53, then decreases & vanishes by 60mph.
car drives great at all other speeds between 0-90 mph
occurs both during acceleration & deceleration.
can't isolate/solve problem (3 mechanics)
control arm assemblys
thrust arms & bushings
front wheel bearings
turned front brake rotors
balanced tires (3 times)
trued bmw aluminum rims (even though they may not have needed)
replaced tires (with michelin speed rated)
my mechanic now thinks replacing old steering gearbox will solve problem
if you have any experience or knowledge of similar problem, please let me know!
thanks very much!