Big changes are underway at Guaranty Bank, but officials are offering few details. Guaranty intends to sell its wholesale origination network with the intention of focusing solely on consumer direct lending through its branches and correspondent network. The bank is a wholly owned subsidiary of Temple-Inland, an Austin, TX-based manufacturer of corrugated packaging and forest products. Temple-Inland declined to comment for this story, as did six stock analysts that track the publicly traded company. …