yeah have your axle boot fixed ASAP. mura lang yung boot, mura din ang grease. should not exceed 400 petot for everything (materials and labor).

if you don't have that axle cleaned and the boot replaced, dirt will get into your CV joint and destroy the joint. that will be MORE expensive (2000+ ang CV joint, wala pang labor dun, then you will need a wheel alignment after replacing the CV joint).