Can you make it 500 miles with a busted axel boot?
It depends a lot on the conditions you will be driving in, and
the condition of the CV (constant velocity) joint before you begin.
The CV Boot (axle boot) is just a rubber protection device to keep
the grease in and the contaminates out. Inside is the CV joint
which allows the axle to flex as the tire bounces up and down along
the roadway. When the boot is torn, it allows dirt, road grit
water, salt etc inside which gets mixed with the grease and
destroys the bearings in the CV joint. With a torn boot the grease
escapes as the axle spins contributing to the early failure of the
CV joint. This is often precipitated by a clicking sound.
Replacing the boot before damage is done to the joint can save a
significant amount of money. Depending on the make and model, many
repair shops charge less than $100 for parts and labor to replace
the boot. If the torn boot is left unattended, the CV joint gets
damaged and you will most likely need a rebuilt axle which can cost
anywhere from $200 to $600. While it is certainly possible to drive
500 miles and get away with it, it is not advisable.