if you didn't get an alignment after the tierod change, that is your issue.
I did my own alignment.
Same things with the MTR's I have pull to the right. No matter what PSI and I have checked my toe about 10 times now with the upgraded tie rod and it is great...
Just put on nitto 35x1250x17 trail grapplers and now I am getting a left pull. I also replaced my tie rod, but this should not cause a directional pull. I have read other forums that this may be due to the tires. My previous MTRs did not pull, my alignment is to spec.
I did my own alignment.
DIY alignments can be pretty good or really bad depending on your skill and equipment. I've done the string alignment with a ruler, but I'd be thrilled to get within 1/16" accurate. If rotating the tires doesn't change the pull, suspect the alignment and get it checked at a shop. Would be worth it to see how close your DIY jobby was.