97 Bravada Trans Problem

My Bravada has been basically great for the last 5 years. Driving down the Interstate yesterday and I lost overdrive. pulled over and realized that reverse was gone too. the check engine light came on, cruise control stopped working and the tach is doing funny things, i had the trans rebuilt ($1,600) 5 years ago. can it be electrical or computer related or am I in for another trans? I hate to be at the mercy of a trans shop.

Welcome to AF. It's coming out, internal failure, sorry.