Hey all, having a strange issue in my dakota. Whenever I put the truck in reverse it looks like it is gonna stall, it drops to about 500 rpm before shifting. A few times it has stalled and ive had to stop and restart the truck. I have no idea what the issue could be. Anyone hear of this before or have any ideas? If it makes a difference my O/d doesn't work either.

 

Throttle position sensor, clean your iac as well

 

How do I do those things? Sorry never had to do that before and got no idear where to start?