I was hoping to switch to a 3.23 gear but don't want to use the cad system since my truck doesn't have the vacuum setup. I might just have to swap the gears out from the housings which was my worst case scenario or just keep the 3.55's. I never thought the seal would be the difference. I'm going to put an 8 3/4 in the rear so I have 2 choices here. Thanks.