06 gt

I have a 06 mustang gt with an automatic transmission. I have been having problems with my car not shifting past 3200 rpm. My O/D light keeps flashing when I drive the car, which causes me to think it’s in limp mode. I rebuilt the transmission, everything is new except for the transmission case...

I swapped the engine out of my car and when I jump the AC clutch to run the compressor in manual to recharge the coolant my clutch is not engaging. When I jump the relay and get a reading of 10V down at the plug right where it connects to the compressor. I plug it back in, but the clutch still...