AWD system on 2011 Lariat Limited and Harley
03-20-2011, 05:52 PM
#41
Senior Member
On my 450 it is hit or miss on the hubs unless you leave them in manual lock. But the transfer case never unlocked. On this limited there is no way to lock the front axle. Because the clutch pack is electric and will not engage without the truck running. Engaging the t case in 4x4 only locks the clutch pack there is no splined engagement. The all wheel drive mode senses wheel slip applies power tithe slipping axle and pulses the clutch pack when there is no slip so you don't feel any crow walk or bind.
03-20-2011, 05:56 PM
#42
03-20-2011, 07:16 PM
#44
Senior Member
03-21-2011, 12:17 AM
#45
On my 450 it is hit or miss on the hubs unless you leave them in manual lock. But the transfer case never unlocked. thw 150s use a lockup collar on the msf and esf t cases and they stay locked. On this limited (awd tcase) there is no way to lock the front axle. Because they use a clutch pack that is electric and will not engage without the truck running. Engaging the t case in 4x4 only locks the clutch pack there is no splined engagement. The all wheel drive mode senses wheel slip applies power tithe slipping axle and pulses the clutch pack when there is no slip so you don't feel any crow walk or bind.
I am still a little confused.
If you are parked on a hill, and the front wheels are under load, and you put the vehicle in park all is well. As soon as you turn the ignition off the front wheels unlock? Then only the rear wheels carry the load? Is this new to the 2011 model?
If so, is this safe? Unlike any Ford I have had in the past.
If I drive in 4X4 on pavement and forget to turn off the 4X4 it certainly binds and clunks when you turn a corner.....
03-21-2011, 01:39 AM
#46
Senior Member
Thanks geabis,
I am still a little confused.
If you are parked on a hill, and the front wheels are under load, and you put the vehicle in park all is well. As soon as you turn the ignition off the front wheels unlock? Then only the rear wheels carry the load? Is this new to the 2011 model?
If so, is this safe? Unlike any Ford I have had in the past.
If I drive in 4X4 on pavement and forget to turn off the 4X4 it certainly binds and clunks when you turn a corner.....
I am still a little confused.
If you are parked on a hill, and the front wheels are under load, and you put the vehicle in park all is well. As soon as you turn the ignition off the front wheels unlock? Then only the rear wheels carry the load? Is this new to the 2011 model?
If so, is this safe? Unlike any Ford I have had in the past.
If I drive in 4X4 on pavement and forget to turn off the 4X4 it certainly binds and clunks when you turn a corner.....
03-21-2011, 06:23 AM
#47
Originally Posted by SultanGris
Pretty sure what hes saying is that only happens in a vehicle with AWD, regular f150s without the awd function still have locking parts instead of the clutches that release on the awd model. so basically a standard f150 in 4x4 shut off is still in 4x4 but awd f150 shut off electric clutches release and its back in 2 wheel drive.
03-22-2011, 12:56 AM
#49
Senior Member
it only disengages when you shut off the key, thereby stopping to supply current to the electric clutches so they release. Only happens with AWD equip vehicles, does not happen with regular 4x4 without awd function. I cannot say if the 2010s are the same or not, until recently I didnt even know Ford made a awd f150 or I wouldve probably bought one. Thats the main thing I miss about my 2008 sport trac, the auto 4x4 feature.
03-22-2011, 07:39 AM
#50
I don't believe there are any safety issues. As it only de energizes the clutches when the key is off and if you are turning the truck off. You should be safely parked with the ebrake set. Very few people park their trucks so awkwardly that they will need the feature of all 4 wheels resting on the parking paw. And to me this may be a more dangerous condition. As the front diff is not locked an it may only take a small jolt to make the front and rear diff to start to back pedal and slide. That's why the make the ebrake
