Reading through all the historical documentation that came with my Imp...a lot of work done back around 1999. Noticed where one of the diff/transaxle repairs concluded with filling her back up with ATF. Some utility company in Portland, OR. did the work. ATF....really? I have no idea what was in it when I took possession last summer, but it sure wasn't red colored ATF when I drained it. I replaced it with something tractor hydraulic transmission related from NAPA. Just throwing this out for kicks and giggles.