Originally Posted by
redbones
Building it now, but came across a serious design flaw.
The ball diff, uses the 416s large diff rings. it fits on the high precision plastic outdrives. However, the ring slips on the outdrive, resulting in a diff that slips no matter how hard you tighten it. The instructions tell you to use rubber cement to glue the rings to the outdrive
even then, it is only as good as how strong the adhesive is against shearing.
Have you tried sanding the diff outdrives and the side of the diff rings that attach to the outdrive? This will help with the rings gripping the outdrives, especially if you use a small dollop of greese there... You'll have stiction from the greese, and the sanded surfaces will provide a good mechanical key.
Save gluing the rings to the outdrives.
HiH
Ed