Problems with transmission in 88 & 89 Broncos

I'm still having the same problems with my newer Bronco II. The transmisson fluid is spraying out from underneath in a fine mist that lands all over the back window and door of my truck. Has anyone else had this problem? If so, what was your fix solution and how much does it cost approximately? I think it has something to do with the gasket seals if that makes any sense. This is the third Bronco of this similar year (1988-1989) that has done this. Any suggestions or comments are greatly appreciated. :shakehead