When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Looking at purchasing 4.08 gears locally (ring and pinion). Is there anyway to confirm the seller has 4.08 gears by markings? I have seen them and counted the teeth on the pinion and ring.
If nobody chimes in, I'd try and get ahold of a vendor, like Z1, they will be able to tell you. I'm sure there is a certain number of teeth or markings somewhere..