My van will not go faster than 30mph, why? on 1996 Dodge Ram Van 2500

I was driving and the van wanted to up-shift (like it was going up hill). Now I can't get it to go any faster than 30mph, it will shift fine. When you start it, it sounds fine, but when you step on the gas pedal, it sounds horrible. What's going on?

by in Portsmouth, VA on September 27, 2012
2 answers
ANSWER by on September 27, 2012
it could be a number of things such as a plugged fuel filter or catalytic converter or a bad tranny
ANSWER by on September 27, 2012
seek a free diag at aamco the shop pricing