Hello, just purchased a 1996 Geo tracker 4 door 4 wheel drive Automatic and was told a newer transmission was put it, approximately year 2000. After fixing a fuel issue it did start as was told and therefore shifted as was told which was in reverse and drive only which is basically 1st gear. It does not shift out of 1st when speeding up whether shifting manually or in drive. I was told the transmission "looked identical " but when they put it in this is what happened. I was wondering what remedies there might be for this transmission if any, and if not, what year transmission would I need to look for that would be plug and play? Thanks in advance!