my third gear went a year agoon my 98 svt ,so i got a new tranny and clutch. now its cold out up here and when i drive in the morning third is grinding. and shifting is hard and notchy. but should i worry? or just wait till its warm out to she if this changes? or does its sound like i should just change the tranny fluid. ( and none of this is cuz i grind gears , i drive like a grandpa)