Well after five years , three of those with transbrake launches and well over 300 runs , my eaton posi unit finally gave up the ghost in Reynolds this year after a few wheelstanding launches. Anyway already had Mark Williams axles so I threw a spool in it and now i'm done. I was on the fence for a long time about installing a spool cause I still street drive this beast , but I cant give up those wheelies Here are a few pics for your entertainment and or education.