i put in synchromesh when i first got trans,and at next change interval.now its time to change again,and i was wondering if there is a fluid that i can use that will make it less notchy,but not hurt the trans.i was thinking about redline fluid.also i work at a gm dealer and we recently got in friction modified synchromesh,but no one knows what its for.so is the redline any good,or friction modified synchromesh?or is there another good alternative?