Transmission help.

[SSsierra90]

Swapped transmissions in my 2000 muntang v6 yesterday and tested it for the first time today and it wont shift by itself and Speedo not working. Is it a sensor that is making it not shift? If so which one? Trans was out of a 03 and put it in my 2000. Could this be the problem?

[cooterbrown]

I'd swap out the sensors from your old one. You also might need a new tune from a transmission shop to reprogram it. I'd call some ebay junkyards like MPS in Georgia to see if it's a direct fit also just to give you peace of mind?

[01svtboy]

check to make sure harness is plugged in correctly