[locomotivebreath]

I’m wondering if my posi is worn out . I have a 10 bolt N unit in my GTO , it has the 4 pinion posi . I’ve only slightly stabbed the throttle since I’ve had this car back on the road but both wheels grabbed . I jacked it up last night to adjust the brakes and when I spun one tire , the other side rotated backwards ? I put it in 1st gear , both went turned forward . Could it just be weak ? I didn’t rebuild this rear during the resto because I wasn’t sure if I’d like the 3.90s ( which are awesome !) just put in new axle bearings & sealed it up . It was very clean inside . It hasn’t been used since the 70s . It came out of a wrecked GTO around 75 or so I just assumed it probably has less miles on it than my car . It doesn’t make any noise or anything . I remember years ago jacking up one side and trying to make it slip per the manual , I couldn’t and I was heck of stout in those days .