I have an 02 Ram with the 5.9L. Just over the weekend it started slipping in first when i start from a stop. I tried manually putting it into first gear with the shifter, and it dont slip at all. I figured i'd ask here to see if anyone knows a fix before taking it to a transmission shop, where they'll tell me for sure that i need a new transmission. Any help with this would be appreciated

After driving this today i dont think its slipping, but starting out in 2nd gear.

why don't you try and ohm out the transmission solenoids and see if they are in spec. if one goes bad it can cause a 2-3rd gear start. mike