everbody has little things they come up with to make life easier.when working on our cars these little things become invaluable,wanna share yours ? it's always handy to have a little advance knowledge. i'll start with a couple. plastic bread bag clips numbered 1-8 make great plug wire markers. when filling a differential, use a marine gear case pump. it screws onto the bottle of lube. remove the gear case fitting and insert the hose into diff. pump about half bottle in then add your posi additive to the bottle. resume filling till you reach the level. these pumps are available every where marine stuff is sold for about 12 bucks.