Hello all, I'm looking to find a solution to an issue I'm having in my 1999 F-250 Light Duty V8. After losing nearly all transmission fluid on a trip and burning my trans up, I had a shop rebuild it. Since the day I drove it home from the rebuild, it has had an issue where while idling in drive (at stop lights for example), the truck will intermittently seem to hit a "rough spot" and sounds like it bogs down. If I slip it into neutral while sitting there, it runs perfectly. But as long as it's stopped and in drive, it will do this. The RPMs don't seem to go down while this is happening, sometimes it may jump down 10 or so at the most. As soon as you get it going and while driving, it always runs great. No check engine lights are on, and other than this the truck is in good shape. I've recently replaced all the coils, so I know they're good. Also, my overdrive has never worked properly since the rebuild. When I press the button to turn it off, nothing ever happens. The rough idle has never actually bogged the truck down to the point of shutting off, but it's pretty annoying and I'd like to at least have an idea of what's causing it.

Thank you!