If a fixed-rate, balloon note lot loan is maturing next month, and we want to do a modification to extend the maturity another 10 years, AND change the rate from, for example, 4.00% to 4.5%, do we need to issue new TRIDs? Thank you.

It depends. A true modification does not replace the original note. If that's the case, then no, it's not subject to TRID.

What if we want to modify the note, PRIOR TO MATURITY, so it amortizes out after 10 years at a fixed rate that is different from the current rate? For example, consumer purpose lot loan, 3 year, fixed rate balloon note, at 4%, matures on 8/1/18. On 7/1/18, we modify the note so it is now 4.5%, re-amortize the existing balance so it pays out in 10 years. Thoughts? Thank you.

It needs to be done prior to maturity [legal issue/check with attorney otherwise]. There is no written restriction on changing a rate, only on adding/removing a VR feature.

I'm not seeing any difference between your two posts, however.

Excellent! Thank you.