97 7.3L diesel E4OD Shifts Extremely Hard! HELP!
So I bought this truck knowing it had a bad torque converter and possible bad trans. So after inspecting I found a lot of metal in the torque converter and it seemed locked upon driving it. So I put a new rebuilt transmission and torque converter in and it still shifted hard. this first transmission died after only 60 miles. So the shop built me another one and sent another new converter. Put this one in and it shifted hard. After driving it 10 miles it suddenly became better. The next day it shifted hard then smooth then hard again. You just never know. When I say it shifts hard I mean it feels like its going to drop out any moment. So then I replaced.
1) Vehicle speed sensor VSS
2) Throttle Position Sensor
3) Took out speedometer cluster and cleaned connections put back in.
Neither of these things helped. I also reset the Odometer/speedometer. Every time I think it's ok it goes back to shifting hard. I noticed that when it shifts hard that it acts weird when I put it in reverse. Like it idles down farther than when putting in drive. Also I noticed that I have an RPM difference when I shift from Park to 1st (800rpm) than park to drive (1000rpm). Weird.
Also I checked the fluid level many times.
Any advice would be appreciated.