[JERRY2KONE]

that sounds weird. A 1" hole in an R/C diff case? Why did they design a hole that big in a diff? Why would you need such a big hole in a small scale vehicle? It seems to me that you could fab a square plug for that and design a smaller vent plug that would let the diff breath, or block it up totally. I have only been in the hobby for a few years, but I have never seen a diff with any kind of hole designed into them. I am an industrial mechanic by trade, and a Mechanical engineer myself and have worked with all kinds of large scale reduction gear setups that have vents intigrated into their design to keep pressure from building up inside the gear cases and blowing out seals, so it makes sense to me. BUT even in some of that largest gear boxes the size of a full size van or larger only had a 3/4" vent built in to them. Any pics of this diff?