when going into second at a high rpm or just shifting hard, my tranny scratches kinda bad, under normal driving it doesnt, friends and some other people say it is my synchros, how hard would these be to replace, tranny has about 40,000 miles on it and i have a gripforce clutch with a new fidanza flywheel so i know its not one of those that are messing up on me. could i do this fix on my own or should i take it to a shop, and where should i get the parts from? thanks for the help