my 93 c1500 5.0/4l60e 2wd has no drive or od. 1st, 2nd,& reverse work. if the shifter is in d or od it makes a clicking type noise, the speedo moves but truck will not move. the brake light came on a while back before trans started acting up. I saw someone else had the same post when i first came to this site but i cant find it now. any ideas???