gators

Hi Guys, Both of my cv joint boots have gone and put grease every where inside the wheel so safe to say it wont be driven, any one else had this? my leon is very low would this be why they have gone? is it a big job to do on the tdi and also wheres the best place to get the parts from besides...

As mentioned, took car to for MOT told 1 gator seal is leaking on drive shaft, had all 4 replaced inners and outers, came to 264. have i been ripped off ????