Completely different, not interchangeable.
Inside the trans, on top of the valve body, called a trs. Trans Range Sensor
If it is a 2002 or 2003 then yes.
2012 Ram 1500 wheels will fit on a 2003 .
No.No.
NoNo
No.
No.
2002 - 2005 Ram 1500 will bolt in, but you need to match the correct ratio.
No grease zerks on a 2003 Ram 1500.
The 5.7 L wasn't in a truck until 2003. You have either a 5.2 or 5.9 Dodge does not have a 64re trans, you have a 46re You need a 1996 or 1997 46 re
$1500 to $2000
Not easily. You will need a different computer and wiring harness.