Vibration during acceleration

[Peter van Es]

Now that my indicator light problems are behind me, I noticed something else that troubles me. When I was driving the car yesterday (good weather, top down) I noticed that when I was accelerating, I could feel a vibration coming from behind me. Either drivetrain, or suspension, it feels like you are driving over a bunch of ridges in the road. Like a 5 cycles per second kind of vibration. I can feel it throug the seat.

In Holland, at many traffic lights there are such lateral ridges in the road, that give that sort of vibration. Yesterday however, I was driving across smooth motorway tarmac, and noticed it even when accelerating from 80 to 100 km/h. When I stop accelerating (i.e. just drive at a steady, constant speed) the vibration stops.

I tried searching the site, but found nothing. Has anyone any idea of what this could be and what I need to do to solve it?

Thanks

Peter van Es


Check out http://bali.esweb.nl for photographs of classic car events and my 1970 280SL

[glennard]

Differential full of 90 weight oil?  tires balanced?  suspension OK?  brake calipers?

[ja17]

Hello Peter,

Check your driveshaft flex disc. Some bolts may be coming loose or the rubber disc is failing. Check the rest of the dirveshaft if you do not find a problem at the flex disc.

Joe Alexander
Blacklick, Ohio

[Peter van Es]

Thanks both of you, and especially you, Joe.

I've since done a search on "FLEX" and "DISk" and found a wealth of information such as http://index.php?topic=6298,disk[/url] and http://index.php?topic=4251,disk[/url] and especially this topic (which I could not find because of the way I spell acceleration   ) http://index.php?topic=6746,disk[/url].

The only thing I don't know yet, is does one really have to remove the exhaust to get at this, and are special tools needed?

Peter

Check out http://bali.esweb.nl for photographs of classic car events and my 1970 280SL

[don p]

I just changed my last weekend after feeling a slight vibration in the stick shift while driving. After doing some digging in the forum I looked at the flex disc and it looked like a ball of fiber!

 I only had to bend the heat shield slightly to get to a few bolts so did not have to remove the exhaust.

The replacement flex disc I bought was a little diffrent from the ones I have seen pictures of and diffrent from the old one that was in the car. The new one a made by Jurid was round(not 6 sided) with no tabs to put toward the transmisson.

Don Pemberton
1968 250SL
113.043-10-004113
190g Graphite gray                     Connecticut

[hands_aus]

quote:Originally posted by don p

I just changed my last weekend after feeling a slight vibration in the stick shift while driving. After doing some digging in the forum I looked at the flex disc and it looked like a ball of fiber!

 I only had to bend the heat shield slightly to get to a few bolts so did not have to remove the exhaust.

The replacement flex disc I bought was a little diffrent from the ones I have seen pictures of and diffrent from the old one that was in the car. The new one a made by Jurid was round(not 6 sided) with no tabs to put toward the transmisson.

Don Pemberton
1968 250SL
113.043-10-004113
190g Graphite gray                     Connecticut

Don,
Was it correct for the w113 or a substitute for a w108?

Bob Smith (Brisbane,Australia)
RHD,1967 early 250 SL, auto

[don p]

I called http://www.egermanparts.com/ before installing the part because the kit had a diffrent part number then the one I had ordered. I was told that it crossed  referenced to the kit I had ordered and was the right part for a 113. I checked all the bolt lengths and they were the same as the old ones.

If I did install the wrong flex joint Please let me know! I would rather change it then see it blow up like I have read from other memebers posts.

Don Pemberton
1968 250SL
113.043-10-004113
190g Graphite gray                     Connecticut