sick cat

well boys , i hit 150 miles on my xtz today and the damn thing went to hell on me !!!! i couldnt get over 55 mph out of her and the left rear CV is leaking at the diff . did i hear something about the CVs falling out?. it also sounds like i have a heavy whine coming from the left rear . i logged a EFI fault on the dash . i would hope thats why the low speed and poor power . any help guys would be great ! the only dealer for me within 100mile isnt worth the phone call . thanks