1990 Q45 Trans manual shift problem

[CrimsonQ]

Ok start of a longish post for me.1990 Q45. 158,000 miles. Guides done, trans replaced at 107k, no trans cooler , fluids all changed, etc etc, basic mantaince done.

Ok now for the problem.

Since day one of ownership, I could never move the gear selector past the D3 position. Even if I tug as hard as I can it wont budge.I took off the console area and there seems to be no restriction (coins, crap, etc.) blocking it from going further.So I figured on checking out the FSM. I looked at the section on manual linkage adjustment. Followed all instructions with the help of a friend and no result. The shifter now moves into D2 and D1, but doesnt actually indent into a gear.

After that failure, I checked out the self diagnosis (without consult), and tried to do the AT test. It stated that I need to push the Shift lock button and pull it into Drive. But I push the shift lock and it just flops around, its obviously not hitting anything or engaging.

So for the questions.

1. Is the shift lock button a possible cause of the gear selector not being able to go past D3?

2. Is it something internal wise?

The car shifts all gears fine in D or D3, punch it off the line and itll downshift to 1st, so I assume the gears are working fine?

Any help would be greatly appreciated, or if any one has access to a lift, thatd be nice too in KC area

ThanxBc