Is it just the wheels with stock 18" tires or are you running the complete takeoffs with the 35" tires?
I suspect takeoffs if it's rubbing that much, if that's the case you should contact Gandalfgrey on this forum, he also installed TRX wheels and tires on his truck along with a few other members.
From what I remember reading, you will need to have at least a 2" level with 1.5" spacers, this will likely still require some trimming and repositioning of the fender liners, zip ties and possible removal of the small mini rock guards as well to avoid any heavy rubbing.
Lots of info from this thread:
https://5thgenrams.com/community/threads/i-got-some-trx-take-offs-on-my-rebel.29417/