Rather suddenly, my jeep has developed a issue with it's transmission. It will get up to speed fine, it cycles through everything just fine up untill 45-50mph. Then it seems to downshift and the tach freezes at 1500. I can still accelerate, but there is resistance on the pedal. I can physically hear it rev higher, but the tach doesnt move. If I press hard enough, it will shift and spike to 3300 rpm. Once again, this only happens at decent speeds.

 

Is your speed increasing? or is it just reving higher?

 

Speed is increasing.