How much work is involved in replacing the carrier bearing on an 06? Also, does anyone have any sources for them other than the dealer, or part numbers? All I have is the OEM number (5183075AC) which is expensive. I've been online for hours searching for an alternate with very little luck. And is there different numbers for FWD and RWD? I found one at Advance that says RWD, but have not seen any reference to FWD/RWD anywhere else. Thanks.