85 300D throbs at idle when automatic is in"D"

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85 300D throbs at idle when automatic is in"D"

02-13-2002, 04:21 PM

Carrameow

Coming back from burnout

Join Date: Jun 1999

Location: in the Pacific Northwest

Posts: 2,274

85 300D throbs at idle when automatic is in"D"

My 85 300D, which is well maintained, shudders and throbs, when I apply the brakes to stop it at a Red Light and the Automatic Transmisson is in "D" position. The shuddering/throbbing seems to come from somewhere in the Exhaust System, believe it or not. Other ideas I am thinking that cause it may be the Pilot Shaft being Loose, Transmission misadjustment, Transmission or Engine mounts...

The shuddreing throbbing goes awy when I place the gear selector in "N" vice "D".

I will put the car on JackStands this week to do a full investigation, but does anyone have any ideas?

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