Nissan Repair: xterra does not start after replacing transmission, bellhousing, flywheel

Question
Ï had the transmission of my 03 xterra replaced by another one, but the car does not start now with the new transmission, what could be wrong?

Answer
Hector,

The crank trigger is on the flywheel and the sensor is in the bellhousing.  Make sure you have the right flywheel and that the sensor was not damaged when the transmission was installed.  Heck, you might get lucky and it did not get plugged back in.