2013 ford F150 Raptor 4WD functionality (ON ROAD)

[DanMan3395]

I think the issue arises between the front and rear wheels and not between the two front wheels. The torsen front diff will allow the front wheels to turn at different rates without issue, however, one of those wheels may have an issue with the driven rear wheel (assuming in open diff state).

The torsen diff is used in audi quatros and there was one in my WS6 so having that engaged all the time shouldn't be an issue, just the lack of center diff to split the torque application front and rear due to the different distances they have to travel while turning?

How far off am I?

This is kind of what I figured... It was my thought that maybe they removed the 4wd auto setting because 4wd high was completely road safe with this front diff installed... I really wish I could get a clear answer on this.

 

[Bigg50]

I have an 05 so I'm not sure what your describing for sure but it sounds like the newer f150's have something similar to an AWD system.

 

[billbunton]

There's a full-time 4WD option available in some of the F-150s. But it's not on the Raptor; there's no differential action in the transfer case. The front and rear diffs have nothing to do with it, you'll get the drivetrain windup between the front and rear drive.

 

[Steele16]

When you turn a corner, small or large, the rear tires track to the inside of the corner compared to the front. This means they aren't rolling in as large of a circle as the fronts, so they are actually turning slower. AWD vehicles like Subarus have a differential between the front and rear driveline. The raptor does not. Neither did my 2010 F250 or any of the numerous F150s I've had up to the 2010 Lariat I have still. If the new ones have full time 4wd, its a new thing.

 

[DanMan3395]

When you turn a corner, small or large, the rear tires track to the inside of the corner compared to the front. This means they aren't rolling in as large of a circle as the fronts, so they are actually turning slower. AWD vehicles like Subarus have a differential between the front and rear driveline. The raptor does not. Neither did my 2010 F250 or any of the numerous F150s I've had up to the 2010 Lariat I have still. If the new ones have full time 4wd, its a new thing.

Thank you, This information sync's up perfectly with how I understand the HMMWV works. It has 2 torsen diff's but also an electronically or manually locking center diff. When the center diff is not locked it even's out torque between the axles.

Thanks again man this completely answers the question.