My trans temp guage didn't seem to work either. When Aladdin shows my trans temp to be around 180 (normal flat level temp) the analog guage is pegged at cold. I was concerned about it also, until this summer when, after a long uphill, the Aladdin showed more than 200, the analog guage started to climb a little. I think you'll find that Beaver just didn't use a very accurate sender.
I love my Beaver, but the engineers clearly lost focus during their engineering from time to time.