I have a noise coming from the rear of my srt6 probably my diff from years pf drag racing also i jacked up tje car on jack stands and rotated the rear tires wow it has a lot of play before engagement soni think my rearend is worn out.My solutionn is to purchase a used srt6 rear differential an purchase a wavetrac unit an install into tje used rear differential anything tips i am missing or is this doable,also certainly not my wheel bearings i replaced botj hubs4 months ago