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#1
10-28-2010, 02:03 PM
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Loud Rythmic Drone
I had a lot of noise coming from the rear end. I took it to George Gantner in Cleveland and he diagnosed it as a bad left rear wheel bearing, which he replaced. That changed the tune. Now between 70 and 75 mph I still have this really annoying droning sound when on the throttle. Passing or climbing a hill it really kicks in. It gets much quieter when I let off the throttle The sound starts to oscillate at 73 mph. Below 70 and above 75 all I hear is the engine which is at an acceptable noise level. I read some old posts about the same sound, but no one ever really solved the problem. One person switched the tires from front to rear and that helped. I will do that tonight.
I checked the trans mount, flex discs and the center support bearing everything looked OK. The subframe, diff. bushings, half shafts and rear shocks are new. George did say I had a little pinion noise, but it is not the source of this wretched droning.
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1987 300D 146K Original #14 Head One eye on the road, the other on the temp. gauge Gone But Not Forgotten 1983 380 SEL Long gone 1983 300SD Wish I hadn't traded it in on a 90' Corvette 1989 300SE My all time favorite 1995 E420 Went like a bullet 
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