4A Binding VS Tire Pressure

[jfiu873hn2nm]

Looking for thoughts on 4A Binding VS Tire Pressure vs damage to drivetrain. Wanting to run 42psi front and 35psi rear empty fox 3.0 adjustable but concerned about axle/wheel speed differences on road. Not using for 4H/L.

Having a difficult time finding a technical description of how 4A wet clutch and other drivetrain components work. Is there a good reference to a technical description of the drivetrain? More than 1 or 2 paragraphs. Is it provided in a service manual?

 

[TwizzleStix]

Pretty good description from Engineering Explained here: The New Ford Raptor Has Both 4WD & AWD! - YouTube

It doesn't go into specifics of the torque value loads. For sure the torque applied through the AWD clutch is controlled by the Throttle Requested Load applied, so if simply cruising down the road the clutch will be open with no torque applied to the front and when Load is requested by the throttle pedal, the electronic clutch applies torque in relation to the Load Requested. I'm not sure, but I don't think it is directly proportional. It appears that there is a point where is applies torque to the maximum capacity. You can see it in action on screen with one of the selected views.

 

[GordoJay]

Looking for thoughts on 4A Binding VS Tire Pressure vs damage to drivetrain. Wanting to run 42psi front and 35psi rear empty fox 3.0 adjustable but concerned about axle/wheel speed differences on road. Not using for 4H/L.

Having a difficult time finding a technical description of how 4A wet clutch and other drivetrain components work. Is there a good reference to a technical description of the drivetrain? More than 1 or 2 paragraphs. Is it provided in a service manual?

If you have the tire pressure adjusted properly, the radius of the tires will be the same. That's why you do it.

 

[Johnkn]

Why in the world would you run 42 in the front? And if that cold, it will end up at 45+ when hot....

 

[jfiu873hn2nm]

Why in the world would you run 42 in the front? And if that cold, it will end up at 45+ when hot....

Costco

 

[jfiu873hn2nm]

If you have the tire pressure adjusted properly, the radius of the tires will be the same. That's why you do it.

Sounds interesting to gather data on. Will use forscan to monitor rev per mi on cold tire. I think i remember it collecting front vs rear.

 

[1BAD454SSv2]

I run 36 front 34 rear everything works good 4 h or 4a.

 

[Oldfart]

Costco

What?

 

[Steebo]

I run typically higher than stock air pressures for added fuel economy but I think 42 is a bit much. I run 38 in front and 36 in back with no issues but I definitely air down before going off road. Careful running over stock air pressures for extended periods as from experience this causes the center of each tire to wear out faster

 

[Johnkn]

What?

I don’t know what that means either...
.