about 2 days ago the rear differential started whining and howling as well as vibrating pretty badly...took it to the dealership, said my pinion was bent, they wanna put 3:55's in it now because they're "factory". the 4:10's were on the car when i got it. since they aren't OEM 4:10's, and it looks like the dumbass who installed them did a piss poor job, do you guys think my extended warranty will cover the work?