So my 1987 TD developed a vibration at high speeds . Most prominent when going around a turn and hitting a bump, the car would vibrate from center as if something is not dampening correctly. Really feels like motor is shaking. It transfers all the way to steering wheel. So its like a prolonged shaking/vibrating after going over bumps or turning hard at high speeds.

I'm thinking motor mounts are shot. Also i notice the shocks are pretty shot on the front. Maybe that is what streesed the motor mounts?

More background, when i first noticed it I got it on lift and checked it out -- found the tranny mount was shot. Replaced that. Also found one of the engine brackets on drivers side that bolts to top of motor mount and the engine was broken and just resting on motor mount. I replaced that too. Thank you parts car. I checked front end components, they look and feel tight and are all relatively new.

Anyway, I'm betting its motor mounts. Can anyone confirm what bad motor mounts feel like on a 603 engine? On a 617, you just see it feel it , hear it at idle, metal hitting metal. But these are fine at idle. I can rock the engine a little with my hand.

Thanks

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What Would Rudolph Do?
1975 300D, 1975 240D, 1985 300SD, 1997 300D, 2005 E320 , 2006 Toyota Prius

In my wagon, my idle rattled like hell, it got better when you were driving but not by much. Shutting off the engine rocked the car some my trans mount was shot too so, all that was wobbling around etc. It could be motor mounts. It's certainly an excellent place to start. I'd do the shocks and mounts and see what rattles next. There could be a couple bushings in the front steering that could need attention too.

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hum.....
1987 300TD 311,000M Stolen. Presumed destroyed

a vibration at speed after bumps sounds like bushings or ball joints.
it could also be the steering dampner...

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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!

Have you checked your wheel balance?

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Beagle