Restoration of truck rear axle differential | Restore of proactive bridge of 3,5 ton truck

Restoration of truck rear axle differential | Restore of proactive bridge of 3,5 ton truck - In this video I restore a truck differential. When I work with it. The differential damaged the quite badly. The details are very large and dirty. Rusted bearings can no longer function. Loose bolts are dangerous when they operate on a truck. Please advise me about the errors in this project
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#truck
#axle
#restoration