Not good vibrations..

[AlleyNiki]

Hi all,

I've just started to drive my aircooled 126 again after a gearbox repair, where I replaced the pinion bearings. No issues there, the gearbox is now fine.

While I did this repair I also:
- fit a new clutch assembly (a BIS one, by schneider)
- replaced the rear retainer bearing oil seals
- replaced the rear engine mount ass'y
- replaced the gearbox rubber mounts, as one of the mounts had broken

I had to remove the flywheel to do some of this, but I marked it and the engine and put it back in the same place. It's definitely lined up correctly.

My issue is that I seem to be getting these vibrations going through the car when the revs reach a certain point. (Like 2500-3000rpm, when I change gear) It's not spine tingling or anything but it is a bit annoying, it makes a sort of bassy vibration go through the car. I don't think it's severe enough for any damage to be taking effect.

Could this be due to the new engine mounts? Are they usually 'stiff' to begin with? Or could it be the new clutch? It doesn't seem to matter whether the car is in gear/moving or not.

There doesn't seem to be any metal on metal where the gearbox mounts and the u-bracket are. But that long torsion plate didn't quite line up with its holes. I had to loosen the u-bracket bolts to get it all to line up. Upon tightening it up there might be unnecessary tension there..? 

[eben80]

I have a similar issue. I know there is some gearbox>torsion-plate contact on mine because of a broken stud when the bush mounts to the gearbox. I would be interested in your solution... it might might just be a case of alignment.

[AlleyNiki]

I have a similar issue. I know there is some gearbox>torsion-plate contact on mine because of a broken stud when the bush mounts to the gearbox. I would be interested in your solution... it might might just be a case of alignment.

When you mention the 'torsion plate' what are you referring to? Do you mean the big bracket that holds the gearbox under the car? :?

[eben80]

I have a similar issue. I know there is some gearbox>torsion-plate contact on mine because of a broken stud when the bush mounts to the gearbox. I would be interested in your solution... it might might just be a case of alignment.

When you mention the 'torsion plate' what are you referring to? Do you mean the big bracket that holds the gearbox under the car? :?

You get the U-bracket that bolts onto the gearbox with 2 rubber mounts and to the body with two bolts. Then there is the torsion plate that bolts onto the U-bracket with 2 smaller bolts and bolts to the body with a bigger bolt at the other end.

[AlleyNiki]

Of course, how could I forget.. I even mentioned it in my previous post. Guess I was tired.

I wonder if you can actually remove the torsion plate and drive without it? Maybe it will make some sort of difference..