2008 Tundra Break/Tranny issue?

Looking for any suggestions. Driving home tonight, and I can hear a low drowning noise/vibration (After research, looks like it's a problem with Front Differential).

Pull into the driveway, as I shift from Drive to Park, there was a loud grinding noise, and the brake wouldn't catch, and the pedal turned to mush and is going to the floor.

Trying to figure out if all these could be related, or some freak thing that all happened at once.

Just bought the Tundra over 30 days ago, its a 2008 double cab SR5 with 116K miles.

 

Brake pedal to the floor usually means low or no brake fluid

 

Already checked that, plenty of brake fluid.

 

Then brake system has air in it. Either way i would take truck to mechanic. Atleast to find out exactly what's wrong. Then you can decide whether to tackle job yourself or leave it to pros

 

A failed wheel bearing or loose front axle nut is a possibility. If your wheel hub wobbles around the brake rotor pushes the pads and caliper pistons back, and it takes a pump or two of the brake pedal to push them back out.

What doesn’t make sense in all that is the grinding from D to P, unless you were still moving thanks to the brakes not working right.