if you use Mobil1, you don't need the friction modifier. On the "S" spring, compress it in a vice then put a hose clamp around it to keep it compressed. Start the edge of the spring back in between the side gears, remove the clamp (I usually have to cut it w/ snips), then hammer the spring home. Or forget the clamp, hold it in place, and give it a REALLY good whack w/ a deadblow.