Date registered: Sep 2017
Vehicle: 1973 450SL
Location: Seabrook, TX
Mentioned: 0 Post(s)
Quoted: 33 Post(s)
Strong vibration during acceleration
I have just about all the gremlins worked out in the new (old) '73 450SL. I am sure this questions has been asked many times before but I can't seem to find a thread that answers my exact issue. The issue I am tackling now is a bad vibration during hard acceleration that seems to come directly from the middle of the car. It does not seem to be worse on the driver side vs passenger side, nor does it seem worse in the front vs rear of the car.
When I pull off from a stop light its smooth, but when I get into 2nd gear and start putting my foot down on the pedal, the car starts to vibrate badly; to the point that it makes the car rattle. The harder I push the pedal the harder the vibration. As soon as I let off the gas is disappears. Hit the gas pedal again and the vibration comes back. Its getting worse each time I drive it. Once I am up to 65-70 and just cruising, the car is smooth as silk. Hit the gas to pass someone even at 65 and it vibrates again.
This may be a separate issue, but when I come to a stop, I get a single clunk noise that seems to come from the rear of the car. It doesn't happen every time. And sometimes it happens when I take off from a complete stop. Not sure if this could be related. I know it can be several parts in the drivetrain causing the vibration, but what would be the most obvious parts to check first without pulling it apart? If you have had similar symptoms, what part failed? Any help is appreciated!