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#1
01-15-2016, 02:03 PM
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hum and vibration when steering to right
On my new-to-me 1987 300TD the car makes very audible hum/growl when the steering is even slightly to the right, i.e. even when going straight if the wheel is a tick to the right of 12:00 the noise is audible.
It sounds like it is coming from the front right but it is hard to be sure. When I first got into the car I assumed it was wheel bearing issue, however I replaced the inner and outer wheel bearing on both front hubs when doing the brakes recently without any discernable effect on the noise. Any tips on what I should troubleshoot next? 
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#2
01-15-2016, 04:13 PM
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Put the appropriate corner up on a jack stand and roll the wheel to see if you have a bad bearing. Also check your suspension to see if it's loose. And inspect your brakes. Any of those things can influence your problem.
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#6
01-16-2016, 05:46 PM
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Rear wheel bearings.
It's a weird sound. Hard to pinpoint pull the wheel and rotor off and rotate the hub with your hand. Both rear wheels have to be off the ground. If you can wiggle the hub at all...
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread "as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do! My drivers: 1987 190D 2.5Turbo 1987 190D 2.5Turbo 1987 190D 2.5-5SPEED!!!  1987 300TD 1987 300TD 1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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#7
01-18-2016, 05:05 PM
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I had a similar issue on my 83. I too suspected front wheel bearings, both were good. Then I found a bad tie rod end. Replaced and the problem went away.
__________________
Mark in MA 05 MB E320CDI 402k Granite Grey Metallic 05 MB E320CDI 267k Black 05 MB E320CDI 232k White 05 MB E320CDI 209k Tectite Grey 99 Dodge 2500 Cummins 5sp 148k 62 Jeep CJ-6 120k
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