saw another eggshelled 271 on a youtube channel i follow, so i got back thinking about this today lol
more research shows pretty common for 100k ish. the NP cases seem to clunk and wear through the housing / gernade. the BW cases seem to do the "chain slip" noise so pretty sure thats where im at.
also in a few places searching found stated the rear case half cant be removed while in truck, case needs to be completely removed, joy.
not paying 611$ for a chain that GVD can have tomorrow. bah. amazon 148 for no name?! looks like torqeking has USA chain for 200$