Toyota Repair: MATRIX A246-E AUTO TRANSMISSION, forward gears, transmission damage

Question
2003 MATRIX 1.8 ENG.(8,) MU4 A246-E AUTOMATIC TRANSMISSION , 46,246 MILES
MY SON WAS PULLING INTO MY DRIVEWAY TO STOP ,AT A LOW SPEED, ACCIDENTLY PUSHED SHIFTER FROM DRIVE UP INTO PARK. DIDN'T EVEN SLIDE THE WHEELS IN GRAVEL WHEN THIS HAPPENED.BUT NOW THE TRANSMISSION STILL SHIFTS NORMAL IN FORWARD GEARS, & OVERDRIVE WORKS FINE. PROBLEM IT HAS IS THAT IT HAS NO REVERSE,ENGINE IS LABORING, WHEELS MOVE FORWARD.ENGINE LABORING IN PARK, LIKE IT IS SLIGHTLY IN GEAR. IT TRIES TO PULL FORWARD IN NEUTRAL. IT HAS NO WARNING LIGHTS ON INSIDE DASH.
                   THANKS FOR RESPONDING,
                    WC  

Answer
Ouch.
There is a chance that you may have bent the linkage. That would be good, as the alternative is internal transmission damage.
This would be best left to the dealer to inspect., so some Trans shop doesnt sell you a trans overhaul you dont need.
Dont be afraid to get a second opinion.

Mike