Currently using Raspi as a torrent box so i'm having a doubt that is the pi-hole compatible with the transmission or i just need to tweak it to work but how?
I tried to install pi-hole but having to much errors like missing files not found cant install etc. Need help badly.
It will probably work fine, but you may need to whitelist some domains Transmission is trying to use. Watch the log file (either in the Web interface of using tail -f /var/log/pihole.log) and see what domains are getting blocked as you are using Transmission (or whatever the torrents are trying to query).
You can also pastebin your pihole -d and we can take a look.