If you are into LEGO RC models you will be happy to discover that he legendary Technic designer Sariel has just addressed the well-known problem of open LEGO differentials, which are prone to slip situations (when one wheel has less traction than the other, it becomes the only driven wheel on the axle which can stop the whole vehicle) and which can be locked but this results in very wide suspension units which are unusable for most models.
As you can see in the video below, moving the differential up, however, it’s possible to keep the suspension’s width unchanged at the cost of added height.
