whats this part??
WHAT YEAR is your car?
Some cars in the '70's had a smog control device part of the NOX controls I believe "on there" on the cable
Go here:
Download the '72 factory shop manual, which is free
http://www.forabodiesonly.com/mopar/showthread.php?p=1970088617
Then go to page 25-6 and read the section on NOx control on automatic transmissions