i need help

I have been having problems with my 1988 acura legend with v6 engine. ! the cv joint on the left side is going out. and 2 it jumps up idle and then it will drop back down to the regular idle. a freind told me it could be the kick down. it kinda revs a little when the idle is up sometimes it will rev a lot. it drive and gets me where ever i need to go it just does this sometimes. its been happening for about 2-3 weeks. its something to do with the trani but i dont think its going out i just dont know what it could be with out having to pay for the diagnostic do help