I just installed a jdm 5 speed in my 86 Accord LXi. All the forward gears work fine, syncros work fine. When I go to put it in reverse, it grinds bad. The input shaft wont completely dissengage when I push in the clutch. Removing 100% of the free play didnt even help. No changes were made except for swapping out the old 5 speed trans. The clutch disc, pressure plate, release bearing, and clutch cable are all new new Genuine Honda Parts and worked fine with the old trans. Can anyone Tell me whats going on?