id have to say sutter that i agree with what you have been told. i went and checked all my yolks. the axles were first night tight, only the lash play could be felt. and the t-case had only the slightest amount of end play. but given its design and function id say that thats correct. its not a crank shaft after all. its to know that all common sense theories still apply, thats part of why i love these trucks.
i use a combination of a 6pt socket with extension and a 6pt wrench to get my yolks lose or tight.
good luck with that vibe bud, i hope its not your converter for your sake.