Transmission won't go into park
I pulled my 2001 F350 4X4 with 7.3l diesel and 4 speed auto transmission into a parking lot. I was pulling a 10,000 lb trailer. It was a slight uphill slope. I stopped, set the parking brake, put the transmission into park, and turned off the engine. When I took my foot off the service brake, the trailer and truck started rolling backward. I had not set the parking brake hard enough. Then something snapped in the transmission or transmission linkage. I looked on the floor of the truck beneath my feet, and saw a torx bolt lying there on the floor. Maybe it fell from the transmission linkage? Now the transmission will not go into park. I can still start the truck by putting the shifter lever into neutral. If I put the shift lever as far as possible toward park, the transmission is in reverse, but I can get the key in and out.
Do you think that something came loose in the linkage, or is the transmission broken?
2001 F350 XLT 4X4 crew cab, dual rear wheels, long bed, black, 7.3l turbo diesel, automatic transmission, 4.10, shift on the fly, running boards, sliding rear window, 38 gal fuel tank, 11,500 gvwr, 20,000 gcwr, 7500 gvw, completely stock, 114,000 miles when purchased, now has 240,000 miles, repairs so far: starter, batteries, cps, brakes, tires, alternator, ball joints, AC compressor, serpentine belt.
2005 Nomad Rampage toyhauler made by Skyline. 11,500lb gvwr.