Had a problem with the car shifting out of 5th gear on the motorway. Read in here about a loose bolt or nut. The t40 bolt was loose, so i tighten it. But now the gearbox wont go into 3rd,4rd or even 5th. It is currently standing with no oil in it, so im guessing thats why. Cross fingers i havent f'ed myself by tightening the wrong bolt or done something stupid. The plastic piece sticking out on the top right snapped when i removed the cover, along with the tube in the cap. Replace box? Where im from i wont find another jc589, but can i use a jc587 from a kangoo?