46rh not shifting into overdrive
I have a '93 Jeep Grand Cherokee 5.2 V8. I just replaced the original transmission with a 46rh with 120,000 miles on it. It is shifting fine, however overdrive is not kicking in. Its still running at 2500 RPM around 50 mph. I had a friend put the transmission in and he is clueless as to why this is happening. All the fluids are fine. Any opinions?