For Sale - Hundai Sonata Gls V6

Re-size the pics and load it up here.

thanks bro,
here are the pics

Please can someone help me diagnose this problem? (I have a Hyundai Sonata 1994/95 Model. Bought in Cotonou last year November.By December, on my way to Port Harcourt, the radiator fan stopped and the top cylinder gasket got burnt. Sometimes in January I noticed that oil was gushing out from where the oil gauge stick is, I took it to a mechanic and I was told that as a result of the overheat  that occurred the previous month my piston and rings had melted. The piston,rings and metals where changed. After about two months the car started smoking, and I was advised to change the engine. The car is Using a Mitsubishi Sigma V6 3.0 liter engine. Now the engine is perfect, no more overheat.)

As I said before, I have a problem that has remain unsolved since I bought this car: I noticed barely a month after purchase that sometime if I start the car and put it on drive (D) It will respond as if it wants to move, but will not until I shift the gear to L. It will then move and as I am driving I will push it back to D. At first this use to happened once in a while. Hence my reason of buying the new Engine complete with gear.

But recently this problem have persit that now I can't move the car when it's park with D, except L and during this period the gear will not select, it will be driving with only the same gear I use to move. I had gone to two gear mechanic and I was advised to change my gear in which I did, but still the problem continue with the new gear. The funniest thing now is that each time it happens and I go to the mechanic, on the way it will start selecting. Sometimes when I parked and ask the mechanic to come and check  the vehicle it will move with D and select normal. Since Monday it has been OK and selecting well, and I wanted to travel today, after buying things for my journey, and about to travel, the problem started.

Please who know what might be wrong with the car? I need help please.