1- well great to hear on the idle issue and the stinkin' fuel filter was the problem!!
2- all the other stuff yup you nailed it! Life of a R/C'r lol
I would possibly start at the rear diff if you lost RWD. the tranny was still making forward progress. was the rear drive shaft still spinning?
I...
do you have filter on the tank to carb fuel line ? or maybe a small pin hole in the fuel line?
starving for fuel at idle cause of hole or filter. I tried a inline filter and this happened to me. @ idle it would starve for fuel but if I get it moving and fuel is pulling at a faster rate it was...