The vibrations only happen when driving in that range, they do not happen at idle. Also happens wether or not my overdrive is on. It isn't speed related as much as it is rpm related. I checked under the truck at the u joints. Everything under there appears normal. Previous threads said the coil packs were to blame, but this didn't work for me.

 

The vibrations do not happen at idle, but there is a little miss at 1500. When driving @ 1500 the transmission begins to shudder. This is rpm related, not speed related. This happens wether I have overdrive turned on or off. I did check under the truck, and everything appears normal. I did not remove the driveshaft though. Previous threads lead me to believe that replacing the COP and wires would solve the problem.

 

Did you check the drive shaft with the truck in neutral? You don't have to remove it but it has to be in neutral.

I'll say it for the 5th time stop replacing stuff until you find the problem a mechanic would of probably been cheaper at this point.