Ford Ranger PX 4WD ute excessive sealant

My understanding as a mechanic is that the use of excess silicon sealant in the assembly of engines and automatic transmissions is an absolute no-no, because particles of sealant can contaminate the oil, lead to the blockage of oil galleries and cause the demise of said engines and transmissions. Well, I purchased a new Ford Ranger PX 4WD utility in July and have noticed that excessive sealant has been used in the assembly of the diff. While this may not be as critical as with engines and transmissions, if the amount of sealant on the outside of the diff is any indication of what is inside, do I have a problem? Is my ute the victim of a bad bonding job and what should I do?