Differential System: Precaution

Prior to starting any work, clean the differential assembly to prevent sand or mud deposits from entering the assembly.
When removing any light alloy components such as the differential cover, do not pry on the component with a screwdriver or similar tool. Tap the component loose using a plastic hammer.
Always organize removed parts in the order they were removed and protect them from dirt.
Apply API GL-5 hypoid gear oil to each part after it is cleaned and completely dry prior to installation.
Do not use alkaline chemicals to clean aluminum parts, rubber parts, or ring gear set bolts.
Do not use any cleaning solutions (ex. non-residue solvent) to clean rubber parts such as oil seals. Apply sufficient hypoid gear oil to any sliding or rotating parts.
Do not hold any parts directly in a vise. Always use aluminum plates between the part and the vise.
Replace any damaged or deformed snap rings.
Do not allow scratches on the differential case contact surfaces. Scratches may lead to oil leakage.
Before applying sealant, completely remove any old sealant remaining on the components using a non-residue solvent.
After sealing components, do not allow oil to contact the seal for at least 1 hour. Do not allow scratches on any oil seal or gasket contact surface. Scratches may lead to oil leakage.
When press-fitting an oil seal, be careful not to damage the lip of the oil seal or the surrounding surfaces.
When replacing a bearing, replace both outer and inner races as one set.