Have a 2000 grand caravan, 3.0, 169K miles. Gave the following codes this morning...p0700,p0734, p1782... would hear a "whirring" sound from tranny but wouldnt go into gear. No lights came on dash and speedo works, fluid level looks and smells ok, (sry didnt taste) and doesnt appear to be in limp mode ...after towing home put in input and output sensors...wasn't convinced it would help but tried because it was cheap... ran about a mile and started doing same thing...Now no codes and same probs. Still no lights on dash....any thoughts...been a couple years since I changed fluid and filter. Gonna try that on monday when I'm off. All help is truly appreciated

 

update...changed the fluid and filter. all looked normal. seems to be running ok. hoping it was that easy.

 

Glad its working, lets hope it stays that way!

 

The P0734 code is not good. Thats a gear ratio error in 4th gear. I also hope that took care of your problem.