hey guys disturbing news on my truck while out 4 wheelin yesterday i didnt realize my truck was 2 qaurts low on oil until i was commin home and saw the oil pressure drop to about 25 pounds and come back up i stopped right away and checked oil saw it was 2 quarts low filled oil started truck back up and made a sound like it was out of oil sounds like bottom end now when ever i rev the engine past 2000-2500 rpm i can hear somthing in the bottom end the truck still has 50 pnds-75 pounds oil pressure what do you think is wrong and can i fix this problem without completely taking the engine apart?