Chrysler Repair: Tranny problem, chrysler dealer, transmission problem

Question
I have a 1997 Caravan with a transmission problem. It just started. When it starts getting warm it defaults to 2nd gear. I just recently change tranny fluid and filter. I scanned it and got a P1776 and a P0700 Code. The local garage told me it needed a valve pack which I changed, didn't fix it. Then I change the transmission computer with no luck, same problem. I just checked the level and it was 3/4 low and added to it. Do you think that would help or could there be another problem? I know I will be needing a front mount since it has excessive bounce when shifts into 4th. Could you help me?
Jim

Answer
u will need a dealer to look at the tranny code  for the p700 Only a chrysler dealer or someone that has a snapon scanner can get into the tranny computer and really tell u whats going on  the 1776 is just a general tranny code  and the 700 just says teh tranny has an issue.