if your transmissions synchronizers were blown on the other gears meaning you couldnt get into gear and really bad grinding sounds theres a way around that when the tranny in neutral let the clutch out briefly quickly put it back in and then push it into gear that brings the shaft with the gears up to the proper speed so that the synchronizers arent necessary do it quickly and firmly and you wont get any grinding although its important that you keep the engine at a constant speed idle is easy thats how really old manual trannys worked before synchros became popularstandard