FORD 1999 F-350 - Manual (Page 123)

With the 5-speed transmission you
can shift into R (Reverse) only by
moving the gearshift from left of 3
(Third) and 4 (Fourth) gears before
you shift into R (Reverse). This is a
special lockout feature that protects
you from accidentally shifting into R
(Reverse) when you downshift from
D (Overdrive).
With the 6-speed transmission you
can shift into R (Reverse) by
moving the gearshift left from N
(Neutral).
1 3
2 4 R
D
R 1
L
3
4 2
D
Driving
123