The tranny mount appears ok, but I'm not really sure? Is there something else I have overlooked?

The vibration happens only when cold, -32F, but there still remains vibration heard from the exhaust system..after warm-up..maybe rubber exhaust system donuts, but they look intact!

Any thoughts?

How about that 180 U-turn from W lately.

That has a different kind of vibration, one that's more annoying!

Yep, got that right.

If it's vibrating when in gear and the brakes applied, you might look to the rear subframe mounts

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DS
2010 CL550 - Heaven help me but it's beautiful
87 300D a labor of love
11 GLK 350 So far, so good
08 E350 4matic, Love it.
99 E320 too rusted, sold
87 260E Donated to Newgate School
www.Newgateschool.org - check it out.
12 Ford Escape, sold, forgotten
87 300D, sold, what a mistake
06 Passat 2.0T, PITA, sold

Las Vegas NV

I was afraid of that, you might be on to something!

I got one right rear that has the body side of the mount badly rusted, maybe rotted through?

Are your motor shocks in okay shape?

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I'm not a doctor, but I'll have a look.

'85 300SD 245k
'87 300SDL 251k
'90 300SEL 326k

Six others from BMW, GM, and Ford.

Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG]

The exhaust hanger next to the trans was my noise problem. Easy fix, just tighten.

Joe

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www.jerseyplanning.com
1987 300TD 440K - My car
2005 Jeep Grand Cherokee Laredo 107K - Tim's car
2000 - CLK320 100K - Deb's car
1994 C230 150K - Josh's Car

The engine shocks and mounts for those shocks play a major role in dampening engine vibrations. Thing is though, to do the shocks and mounting hardware for them, it costs about $150 at a certain online parts distributor. I think it was $50/side for mounting hardware (these have bushings in them that help) and the shocks are I think about $25/side. Can't remember exactly though.

Thanks
David

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2000 Honda Accord V6 137k miles

1972 300SEL 4.5 98k miles

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I replaced engine & Tranny mounts on the SDL recently but still had some vibration felt through the accelerator pedal at certain highway speeds. My mechanic tightened up a locking nut on the driveshaft joint (not exactly sure where) that wasn't loose but could be tightened about half a turn. That eliminated about 40% of the vibration. Replacing both the Rubber Donut flex couplings and the Centre Bearing improved it another 40-50%. The one flex coupling was so hard it was like concrete - no flex at all Gear changes and overall smoothness are much improved.

I figure the remaining vibration may be down to engine mount shocks that were not replaced with the mounts themselves, or some small binding of the driveshaft universal joint due to operating in a slightly different position after the tranny mount renewal. Could also be related to rear subframe mounts, which are still on my 'to do' list - I'm working my way rearwards

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1991 M-B 560SEL Arctic White/Grey 99,000 Miles
1987 M-B 300SDL Ivory/Palomino 229,000 Miles (sold but never forgotten)
2006 Volvo XC70 Blue/Beige
1999 Porsche Boxster Arena Red/Savanna Beige
1986 Porsche 928S Goldweiss/Brown

Brian,

What did you mean by this? What is a "W"?

-Mike

The 87 300 D does not employ engine shocks such as other chassis do.

I don't think it is a rear sub-frame bushing, but I wonder now about my flex discs. If the rubber gets harder with time, it might make it's self noticeable at lowering temps sooner than newer more pliable rubber?