Drive shaft center doughnut ; is the fat end to be i stalled down?

[Pinder]

I am about to replace the rubber doughnut but wanted to know which part of it should be down? The center hole is not centered. Also the new transmission mount i ordered has red dot on it. Is there any significance to the red dot

[PeterPortugal]

The red dot indicates it is a mount for "normal" road conditions.

[Pinder]

thanks. thats good to know.

Any thoughts on the doughnut center bearing on drive shaft? I think the fat part of the dougnut is to be on the bottom ?

[PeterPortugal]

I have sent my driveshaft off for rebuilding so I cannot check easily...but I think because it has two "button like" protrusions on the outer diameter which locate it, you can only install it correctly as far as up and down is concerned. I think you could possibly put it in back to front though. My car is early and has a grease nipple fitted which is accessible via a hole in the donut. This means you can't go wrong.

[Pinder]

On mine I can fit it either way. Ill see which way makes the most straight alignment.

[dirkbalter]

Are you talking about the rubber one?

[Pinder]

Yes thats the one. Mine is a280sl

[dirkbalter]

I have a 230. Mine has to go in the position you see (grease nipple). Yours should be similar conceptually.

[Pinder]

Ok thanks for the picture. It helps.