ifs its driven a bit hard or in hot conditions, every 6 months. but normally you can safely get through a year then again lots of people never change it but to get the most lubrication every 6 months to a year.
i gt a stage 2 shift kit in mine i had a corvet sevo i dno if they set the hole thing up wrong but it fuked up my diff it was to hard of a shift was good to start off with cherping 2nd was aws then it started making a big clunk then started makeing a bang nd grinding sound nd then only one wheel was spining i was like wtf took it bak the guy took the corvete servo off nd put the old one bak on gt my diff locked again nd it was fine so yeah duno wether a gd idea to gt one of those things eh the stage 2 shift kits prime thoe holds the gears for way longer nd cherps 2nd
the stress that you put on the diff after you installed the shift kit would have broken the two welded points in the locked diff, which by the sounds of things wasnt welded properly
yeah i duno thoe cuz that corvett sevo made it fairly slam into second wether it was because the locker was fuked that coulda just been makeing it sound like it was slaming into gear i duno ill do some studdying haha