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  #1  
Old 10-17-2011, 07:04 PM
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Vibration 40 mph in a 280 SE 108 Body 6 cylinder

Can feel a vibration about 40 mph, wheels balanced, driveshaft has been rebuilt (thought that was it, u joints were notchy and carrier bearing was shot) any ideas? Not there before 40, can feel it throughout the car.
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Old 10-17-2011, 07:34 PM
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I know you did it, but 90% of vibrations are wheels and/or tires. Check again? Inside tread separation?
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Old 10-17-2011, 09:54 PM
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Replace that bad carrier bearing and see what happens.
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Anyone who thinks a 300D is fast drives too slow.

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08 Triumph Street Triple 28,xxx miles, lowered 10mm in front, Pirelli Angel GT tires, EBC HH brake pads, otherwise stock.
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Old 10-17-2011, 11:28 PM
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First and foremost: How's your flex disc?

Bad engine and/or trans mount? Bad bearing in the axle or hubs? Put it on a lift, check all 4 wheels for play & operational smoothness. Check to see if the engine mounts are shot or not. I assume you replaced the bad carrier bearing, but your post isn't clear - just says it was bad. Do that if you haven't!
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Old 10-17-2011, 11:48 PM
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driveshaft was sent out has new u joints, carrier bearing, and flex disc.
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Old 10-17-2011, 11:59 PM
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Oh, I see, the carrier bearing was shot. There's an off chance that the driveshaft shop put it together out of phase and/or got the balance wrong. Another possibility is that the tires are balanced, but are out of round, or have a road force imbalance.
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Anyone who thinks a 300D is fast drives too slow.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 360,xxx miles
08 Triumph Street Triple 28,xxx miles, lowered 10mm in front, Pirelli Angel GT tires, EBC HH brake pads, otherwise stock.
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Old 10-18-2011, 12:11 AM
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same vibration that was there BEFORE I sent the driveshaft out to be rebuilt
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Old 10-18-2011, 01:18 AM
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If the vibration is more apparent while under acceleration, then itīs probably somewhere in the drive train. It itīs a tire problem, the vibration will be the same with or without acceleration.
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Old 10-18-2011, 11:21 AM
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Check and/or just replace subframe mounts and motor mounts, and transmission mount and rear axle mount (inside trunk).

These are all critical I have found. All or none.

and everything the others have suggested, too
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