2005 Lariat 5.8L Ext cab
 

Truck is hesitant to engage into drive. The column shifter shifts fine and once it starts to go, shifting is fine. But I have to lightly feather the gas pedal to get it to engage into gear. Reverse works with no issue. Is this a tranny issue, a torque converter problem? A friend told me it could be a valve port? I am trying to see if it's gonna be a $100 fix or an entire tranny job. Thanks for any help or suggestions. There are no dash lights on. I just had the tranny flushed
https://cimg3.ibsrv.net/gimg/www.f15...f273ee4e67.jpg
and this started a month later.

Anybody know what this wire is running along top of the shock mount?
https://cimg8.ibsrv.net/gimg/www.f15...a09b44032.jpeg