66 differential

2 different differentials 2 confusing issuse .... it wont come apart why ??? hopefully someone can help me figure this out? i know this may be a long description but is necessary... i decided to remove the diff from my 66 tbird to check the bearing and replace the seal that was leaking and i...

I'm about to take apart the rear differential of my '66 Q code (428 CID) Thunderbird, but I want to drive it while I still line up the parts I need for the rebuild. There is no code tag on the differential, so I'm left wondering what's actually in there. All I know from the door code is gear...