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Rough Ride

Suspension and Steering

Vehicle Information: Model: 911 ; Year: 1988; Body Type: Convertible; Engine (type, size, modifications): 3.2; Total Mileage: 126000;

I recently acquired my first 911 and have been very pleased w/ all aspects except one...substantial vibrations on the highway at 80+mph (looking in rear view mirror all is a blur). Tires have low mileage (10K, but are almost 3 years old) have plenty of tread and appear to be in good condition. Shocks (boge) appear to be original, and when checking dampening by standing on the corners and jumping off no ongoing oscillation observed. Cornering is tight and handling crisp.So my questions are: 1)Is this normal/get used to it? 2)With the amount of mileage should I replace my shocks (and if so, should I stay with boge or consider koni, bilstiens or others, fronts, rears or both) 3)Should I check to see if the tires are true and consider replacing them (front, rear or both), should I have the tires spin balanced? 4)Could it be something else that I am not presently considering.Your advice on the quickest and economical trouble shooting steps I should takes is much appreciated.

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