I have noticed that as it gets colder my truck seems to not move forward when first started. At first I thought it was a parking brake issue but I have stopped using my parking brake. I can go in reverse just fine, but when i throw it in first it moves a few inches then seems to lock and get stuck. I dont know what to do and if someone can help it would be great

__________________
2004 Ford Ranger XLT Supercab 4.0 V6, 5 Speed Manual, Turn signal mod, LED tailgate light bar, Toyo A/T Tires, Stock rims painted black, modded gauges, rear leaf blocks and front torsion adjusted.

Give some more details, like is it auto, std, does it work after it warms up, but it could still be the parking brake not releasing all the way.