What I'm trying to do is use my factory 4.10 down carrier with 5.13 gears. I havent been able to locate thick 5.13's and so I am looking to get a ring gear spacer. I know no one makes these so I'm going to a local machine shop to have them make me one. So I was wondering if anyone here knows the thickness difference betweenthe two carriers. If I can get them made cheap enough I'll let you guys know.