Review on Crown Automotive D300GS Dana 300 Gasket and Seal Kit: Superior Quality for Optimal Performance by Brian Olson

. The O-ring for sealing the intermediate shaft is missing, without it your transfer case will leak. I bought a pack of 10 o-rings at a hardware store after damaging a quadratec OEM replacement. You might as well buy a complete rebuild kit with new bearings and raceways as you will have to pull everything out to install all the seals. For seals, but not for out-of-tolerance, shims require thin aircraft shims. The local auto parts store had it and all went well.