I assume that any junior mortgage lending for primary residences on a closed end product require the use of the new loan estimate and closing disclosure. I have not been able to find any direct information on it.

Yes - it applies to closed end consumer mortgage loans.

I assume that any junior mortgage lending for primary residences on a closed end product require the use of the new loan estimate and closing disclosure.

Just so there is no misunderstanding. ANY closed-end consumer purpose loan secured by real property (dirt) regardless if that real property is land only, single or multiple family residential or commercial property the loan it subject to TRID regardless of lien position.

^^^this! The use of the term 'mortgage loan' leaves an awful lot of room for incorrect assumptions!

It is a matter of learning how to read the rules.

1026.19(e) says:

"(i) Creditor. In a closed-end consumer credit transaction secured by real property, other than a reverse mortgage subject to § 1026.33, the creditor shall provide the consumer with good faith estimates of the disclosures in § 1026.37."

Lien position is not part of the requirement...therefore it covers all closed end consumer credit secured by real property.