Hi,
I assume you have a 42RLE transmission because if you have a NAG it tells you to leave the transmission in Park while you remove the electrohydraulic control unit (valve-body).
If so I attached the procedure on how to remove it. As you will see it tells you to remove the shift cable from the lever at the transmission then put in the L position. So when you are installing this you just reverse that which means you just move the manual valve (shift lever from the L position to the Park position manually then reconnect the cable.
Let me know if you need more info or if this doesn't make sense.
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Wednesday, July 10th, 2019 AT 3:39 PM