remove domain controller 2008 from active directory

Hi,

I have 2 DC 2008R2 & i have 2 ts one of them don't get the GPO i do everything i found that my 2 dc don't replicate good i can see the different on sysvol folder.

After that i explain my self, My question if i remove the dc (its not the fsmo dc its the second), and after removing i add this dc ?

I need to check some checks before ?

After removing i need to delete from the dns record

?After Adding the same dc to the domain i need to check something ?

Thanks

Zahi