Im in the market for one depending one as mileage

My father’s 99 F150 lost Reverse gear just recently, The four forward
gears are fine (seemingly), But it’s like the engine is free revving
in reverse, almost as if it were in nuetral. Any ideas as to what this
could be? Im Hoping it’s possibly the linkage keeping it in nuetral,

I bought a 2003 Ford Explorer Sport Trac. Can anyone tell me where the door
keypad code is located?

A while back someone told me I could convert my straight axle truck to power
steering using some Toyota truck steeering box.  He wasn't too sure of the
year or application.  Anyone ever heard of this?