Originally Posted by jerseymike
The carrier needs to be machined(drilled) to accept the aftermarket bolt pattern. Yes you can do this to the factory lsd. I went with the stock 4.10s because I didnt want so many hole in my new diff. But plenty of guys have dove it. This is for the rear, I have no idea what you have to do to the front.
Did you have this dealer installed or did you buy the stock gears and take it to another shop? Since they are the stock gears I am assuming labor would be less intensive... as you stated there would not to be any new/as many new holes.