Dmax trans case fix

I was looking at your fix kits for the transfer cases. I was wanting to know if the simple fix kit that includes the rear seal and plate is the better deal. I plan on having this installed, is this all the parts that my mechanic will need to solve this issue or are there some things i need specifically from GM?

Thanks for the info in advance
Ryan

I put the simple kit together because I had guys asking about the rear output seal or transfer case adapter gasket etc. Having this kit gets you most everything you need when doing the job provided the case is not leaking. Just need oil.

I forgot to ask does it matter what trans i have? I am getting a truck with the ZF-6 manual trans so will i need this fix or does this only apply to automatic trucks?
Thanks alot
Ryan