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post #1 of 8 (permalink) Old 10-30-2018, 12:41 PM Thread Starter
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New vibration

Ok i put new tires on the my 88 420 before the new tires it didnt vibrate the tires are balanced and checked twice its not the tires. The vibration is in the back half of the car. It vibrates above 45 mph about 70 kph im thinking its the center drive shaft support or the cv axles. Please help
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post #2 of 8 (permalink) Old 10-30-2018, 01:51 PM
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You might have tire thatís out of round.
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post #3 of 8 (permalink) Old 10-30-2018, 01:53 PM
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If it did not vibrate before the new tires were installed and vibrated right after the new tires were installed it is the tires . Do you have spacers or hub centric Rings on your car ?

swap the fronts to the rear of the car and take it for a drive. Are your rims stock?
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post #4 of 8 (permalink) Old 10-30-2018, 02:01 PM Thread Starter
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Everything is stock no spacers no rings
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post #5 of 8 (permalink) Old 10-31-2018, 03:02 AM
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@Mercrazy , you're gonna need to fill in some profile information. Your other thread on this got auto moderated by the system as sometimes happens, as it thinks people without profile info are spammers.

I unmoderate them if I see them, it depends on us noticing them though and if we're browsing on mobile devices it is a lot harder to notice. So some people without profile information never get their questions answered.

If you're having trouble, try on a PC.
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post #6 of 8 (permalink) Old 10-31-2018, 07:09 AM
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Ah the pain of solving vibrations.

If all was well before I would suspect the new tires, balancing equipment or install. If the shop that did the work doesnít maintain its equipment, itís possible their balancer is not up to spec.

I assume you checked of all the wheel bolts are tight.

You can go all out and have them Road force balance the tires to wheels. Itís about $30 a tire.

If that doesnít solve it, Iíd say itís the new tires.

Which tire did you get ?


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post #7 of 8 (permalink) Old 10-31-2018, 08:03 AM
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One last check on the tires is to move the rears to the front and see if the vibration is now evident in the steering wheel. If not, I'd be looking at the driveshaft.
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post #8 of 8 (permalink) Old 10-31-2018, 08:48 AM Thread Starter
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I jacked the rear up and took the tires off and got it to speed and it still vibrates i let it spin in idle and it looks like my drive shaft is bouncing so im thinking its the center support bearing or its bent
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