Wondering other than the gears, any extra parts(cost) that are associated with getting 4.56 gears or even 4.77 gears since I heard 4.77 gears fit like stock to our housing.

Thanks

 

I can name a few:

Crush sleeve
Inner bearing
Lock nut

 

Any gears that are the same dimensions as our stock gears will fit "like stock". This doesn't eliminate the need to get extra stuff. Even if you got another set of OEM ring and pinion set, you would still need to change stuff.
Inner and outer pinion bearings, crush sleeve or 2, shims of a thickness that you will not know till the calibration is under way and assorted bolts and parts that may not survive the disassembly process.

 

the 2 oils seals as well. theres a list in the thread that announces the 4.56.

 

Interested to buy gears,already installed in diff.from Rick's.!!?
Possible???