Only under heavy accerleration does the tranny grind going to first to second gear, all other gears are smooth and noise fee, what could be causing this. Also every once and a while it will pop out of 5th gear, it doesnt matter what im doing it will just randomly do it, if I keep my hand on the shifter to kind of hold it there it wont do it. I dont know a whole lot about manual transmissions so any help would be greatly appreciated. Also I dont know if this matters but my speedo doesnt work.