Step 1 :
Make sure you have Transmog tokens in your bags, if you want to transmog a weapon you already farmed/bought you can skip ahead a few steps.
you can buy the transmog tokens from other players or the vote/donate shop and also world quests. They are also Drops from bosses, so check out the boss section of this site to find out what bosses drops them!
Go to wowhead.com and find out what piece of gear or weapon you want to transmog your piece/weapon in. simply search the item and go to it’s page.
when at the page go to the URL and remove everything that comes behind the item ID and replace it with &xml, i’ll show an example of an normal URL and a editted URL.
normal item URL:
After loading up the new editted URL you will see a XML file, in this file we are able to find the item displayID.
Select the displayID and copy it.
Go into the amber wow mall and walk up to the transmog NPC.
select wich item you would like to transmog, choose the right item or else it will be invis, wich would be a waste of youre token!
after selecting the right item a bar pops up where you have to fill in the display ID of the item, simply paste the ID we just copied and press enter.
Now you will recieve an item in your bag that has the display id you just filled in.
Move over to the transmogifier NPC and select the item you want to transmog, in the list there should be the item you just created. press it and you are ready to go!
For Visual help there is also a transmog tutorial on our youtube channel: