GM 8.5" 10-Bolt Chevy Mini Spool - 30 Spline Fits GM 8.5" 10-Bolt Standard Open (Non-Posi) Carriers Fits GM 8.5" 10-Bolt Front or Rearend Applications w/ 30 Spline Axles Provides Complete Lock-Up Will Not Fit Posi Carriers Will Not Fit 2000 & Newer 8.6" Carriers