Quote:
Originally Posted by fonzi
Just curious, but would the 560sl rear subframe be better to line things up for the mount because the mount width is probably the same as the c107 and w123?
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Meaning the width of the side subframe mounts I'm assuming?
They have no bearing on where the diff needs to be in relation to the control arms and hubs. The only thing that matters is that the outputs of the diff and the front flange for the driveshaft are in the same place as the original gen 1 diff.
I will install the gen 2 diff rear cover with the offset mount provision on the gen 1 diff(which would originally have the centered mount bolted directly to the diff cover) and install it in the w123 subframe by the 4 studs(red dots that you can see the gen 2 diff doesn't have). This will allow me to bolt the added on gen 2 subframe mount arm(yellow triangle in the pic)to the diff cover after cutting it off the w126 subframe and trimming it to get it to fit the w123 subframe for welding. Then build a jig to bolt to the drive flange and weld or bolt it to the subframe. Once that is all done the diff comes out and the gen 2 cover goes back on to the gen 2 diff. It will now bolt into the w123 subframe by the drive flange and the diff cover and I can now build the front mounts up on the subframe to where they need to be and it will all be perfectly lined up. I'll need to pull the diff one last time to finish weld all of it and paint it. The new portion of the subframe has the holes that the big offset rubber and steel mount bolts on to instead of being centered and bolted to the diff cover on the gen 1 w123 type mount.
I'll try to document it when it's getting done.
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