Tlaroche24

I have a 2008 Colorado 3.7l with the 4l60e tranny. The other day I was merging onto the highway from a stop and the truck slipped and the motor revd up. I pulled over turned it off and back on and was able to drive. I知 throwing codes p0741 and p1816. The truck drives until the tranny warms up then slips out of gear. If I turn truck off then back on I知 able to drive briefly until I come to a stop again, at that point the truck won稚 go, engine just revs. Again turn truck off then back on and I can go again. I知 also hearing a clicking sound while pressing the accelerator. Any thoughts on this issue?