Hello friends greeting from Argentina.
My fs5w71b was broke at disarming found a broken ruleman (6305) fortunately not broke anything.
Also found this separaccion (4 mm) between mainshat lock nut and OD (5th main) any suggestions besides his replacement.
By osvaldogarcia, shot with FinePix A500 at 2008-04-21
Thank you for the information and many tada apologize for my very bad english
The loosening locknut problem is very common. I don't know the "recommended" fix. Most FS5W71x information is in the SD2x forums, but the transmission is pretty much the same as in many other Nissan vehicles.