i was greasing the ball joints on my 1987 chevy motorhome. i noticed grease came of the seal, but it was very small. should i be worried at this time, im driving to fl from mi. can i just watch it and keep grease in it. i might want to have it changed. its the lower joint. whats the parts number for it. 1987 champion lasalle chevy 454 p30 i think its a p30. also can i change it myself with out to much problems. i hate going to a garage my mother does better work.