Transfer of Loan Procedure -

1. Apply for Account Statement, Foreclosure and list of docs statements from HDFC
2. Get 6 monts bank a/c statement, ID proof, 3 months Salary slips
3. Talk EC for 30 years, Registration docs
4. Go with the docs to SBI branch (contact branch in your city) ask for RACPC
5. Anyone in SBI - RACPC Office (For SBI Home Loans this office keeps the
records and does the disbursals) could help you.

The Documentation is common for any loan transfer, I have taken loan from ICICI Bank.