Guys,

We have 4 2015 F150's where I work, and they are used as trucks. While in the field working (corn, milo, wheat, soybeans, etc) we are using 4x4, as there is some snow, or the tillage of the field requires it since the ground is frozen and won't give.

We are hearing a loud bang while using 4Hi in 2 of the 4 trucks. It's a scary bang, like something broke, but nothing is wrong. It only does it in 4Hi.

Just to be sure the guys were not beating the trucks, I drove one myself, and sure enough, it happens.

Anyone else having this issue? I'll run them to the dealer soon, but curious what folks are hearing.

Thanks!

 

Just tou double check, you aren't in the 4-auto selector position are you? You may or may not have that depending on your trim level, but 4-auto behaves differently than 4-Hi.

 

I've heard of a few trucks where the IWEs don't properly engage. What causes it to bang? Applying throttle? Coasting? What speeds?

 

Is the 4x4 **** pulled out? That would cause the rear axle to be locked. That, combined with being in 4HI would cause more drive line binding than without the rear locked. The only way I would use 4x4 with a locked rear is in loose material, mud, sand, fresh plowed ground or unpacked snow.

 

Loud clunk is probably unit going out and back in 4WD while under load.

 

As others have stated, the conditions and actions when the bang (or maybe a loud clunk?) happens would be key to understanding what's going on.

Was it during the shifting into or out of 4Hi?

What were the ground conditions? Dry surfaces can cause a lot of binding because the tires won't be slipping around much. If you're on ice, snow, or mud, the tires will be slipping more, and will bind much less.

Do the trucks all have the same kind of tires, or are some of them equipped with more aggressive tires (which will grab more than less aggressive tires)?

Who's driving the trucks? Believe it or not, this could be, at least partially, due to the techniques (or lack thereof) of individual drivers.