I tried everything mentioned and it still won't go into low range. Could it be a faulty vacuum system or diaphragm?
Yes, I am. Went up a sand hill and got so far until it started to lug. I decided I needed a lower gear so I tried to put it into low. It beeps and flashes and the front tires are still engaged but it doesn't go down to a lower gear. I used to play with old school muscle cars but I am not familiar with the new electronics of today so please start from the simplest terms and I'll try to follow along. Hmmm... How does a person get his hands on one of those factory repair manuals?