There are several stories in here of folks paying off their installment loans and getting a hit on their scores. Others have posted score bumps when getting a new loan.
I talked with my bank a couple months ago about this. They offered to open a loan of $2000 if I open a $2000 CD as security for the loan. They also offered a rate of 6% for the loan, which was a little higher than the CD rate. The term would have been for 1 or 2 years. IMO, it didn't make sense to lose money just to bump my score up. I might reconsider once our car loan gets paid off early next year.