Manual says only to drive 30-miles in 4x4.

Is there any truth to this or just dont go 30+ miles in 4lo?

 

Never heard anything like it...

My owner's manual says this:

Using the electronic shift 4WD system (if equipped)
2H (2WD High) - Power to the rear wheels only; used for street and
highway driving. Provides optimal smoothness and fuel economy at high
speeds.
4H (4WD High) - Used for extra traction such as in snow or icy roads
or in off-road situations. Not intended for use on dry pavement.
2007 F-150 (f12)
Owners Guide (post-2002-fmt)
USA (fus)
Driving
259
4L (4WD Low) - Uses extra gearing to provide maximum power to all
four wheels at reduced speeds. Intended only for off-road applications
such as deep sand, steep grades or pulling heavy objects. 4L (4WD Low)
will not engage while the vehicle is moving above 3 mph (5 km/h); this is
normal and should be no reason for concern. Refer to Shifting to/from
4L (4WD Low) for proper operation.
Shifting between 2H (2WD High) and 4H (4WD High)
• Move the 4WD control between 2H and 4H at any forward speed up to
55 mph (88 km/h).
Note: Do not perform this operation if the rear wheels are slipping.
Note: Some noise may be heard as the system shifts or engages; this is
normal.
Shifting to/from 4L (4WD Low)
1. Bring the vehicle to a complete stop
2. Place the transmission in N (Neutral).
3. Move the 4WD control to the desired position.
• If shifting into 4L (4WD Low), wait for the 4X4 LOW light in the
instrument cluster to turn on indicating the shift is complete.
• If shifting out of 4L (4WD Low), wait for the 4X4 LOW light in the
instrument cluster to turn off indicating the shift is complete.
Note: Some noise may be heard as the system shifts or engages; this is
normal.

It can be engaged in speeds up to 55 MPH, but DO NOT EVER do this on dry roads!!!

 

I you have your truck at 55mph in 4Low...you're a fool!

 

Actually, it's the only way to go wheelin

 

 

I would get on the black top and start driving in 4Hi.
IF you do it, it more than likely won't hurt much of anything(just more wear), but you're on hard ground, can't get stuck, no need for 4x4(or the slight possiblity of binding the t case).

I wouldn't drive on the road in 4Lo at all, just off road.

 

if u can move at 55 m/h(88km/h) as fare as my experiemnce tells me u don't need 4wd low and are wasteing engine pwer and