hi everyone, my 96 v6 model has always had an erratic tach - jumps up and down erratically while driving (but not idling), and it's not the engine revving or anything like that. is this a common problem with this year? also the turn signal never works right when the car is cold. you click the stalk up or down and it makes either a very fast clicking sound with no lights blinking, or a slow erratic clicks. after a few minutes when the car is warmed up, the signals work normally.

and lastly, anyone have a suggestion for a tranny additive? i was hoping to add something at the next fluid change that might prolong it's life. the car has a lot of mileage so i thought this might increase longevity. thanks a lot.