You might be able too. But you are probably looking at replacing the shifter itself. The inner shaft gets depressed when you squeeze the T-handle so you can shift from Park, D to 2 or low and etc. Can you move the shifter freely through all the gears?
I'm guessing you can. You'll have to do some more research and disassembly to see what you need to do to fix it or you may end up replacing.
