Thanks all who have answered my post.I did try today with a 17 and a 7 mm wrenches,a flashlight and WD 40.It worked I was able to get to the nut and release it ,it was hard and then atonishly I was able to move the small square flat head bolt ,just with my fingers,but I thnk I tightened it too hard since my car is now doing the following:
a)First to second almost unperceptible
b)second to third ,there is a braking and then the engine revs up to 4500 RPMs and shifts.
c)There is no shifting from third to fourth,I can even get to six thousands RPMs and nothing.
Mi concerns now : Did I tighten it too far?How many turns should I do to release it now?
Unfortunately as it was so loose I did not control my fingers but I will give it a try again.early in the morning.
Thanks again .