Larry,

Do you have each tire balanced on both sides?

I see it's a manual transmission (I'll trade ya ). Have you checked rear trans bearing play with the trans in neutral? Just wondering if you have some play there, allowing slight vibration that increases as the speed does (differential bearing also is a suspect).

I have experienced this on other cars, such as hot-rods in the past with carrier bearings in the driveshaft, and it turned out to be the rear transmission bearing play. All that power hitting the rear bearing after dumping the clutch in a big block [383 magnum] dodge 4-speed.

Maybe this will help someone, even if it's not your current problem. Good luck with it!

__________________
'87 300E | 2.6 engine
Artic White - Navy blue interior, chrome rims, very clean and sharp!
91 300E
89 300E


The rest of my collection are just cars and trucks...no more "automobiles"...