All you need to refresh all bearings and seals for your 188L differential.
***NOTE: Due to variances in the manufacturing of bearings, you may need to use different shims for the pinion and carrier bearing caps as the tolerances are not always exact. Professional installation by a shop experienced in rebuilding differentials is strongly recommended.***
Both Pinion Bearings and Races
Carrier Bearings and Races
Carrier Bearing Seals
Pinion Nut and Lock Ring