Not contour related so if this isn't appropriate just tell me. I have a '95 villager GL that drives to about 55mph just fine but as soon as you get to the 60- 70mph range the rpms are at 6000 or higher. It's not shifting to fifth gear (or overdrive, not sure). I took it to the dealer and they just said tranny's blown. Which doesn't make any sense to me as it drives both forward and reverse. So I took it to another place and was told it could be the shift solenoid or the rpm sensor. Now my question is how would I check if it's either of those so I could do the work myself.