Anyone have this problem front wheel drive 4x4. Front wheel engage seem to wana lockup in a slow turns. fine straight.


when engage in 4wd how fast is it allow to go. (speed wise that is)or does it matter

https://www.f150online.com/galleries...y.cfm?gnum=394

 

i hope to heck you are not driving around on dry pavement in 4x4 mode!! it is normal to notice some "binding" in the drivetrain when in 4x4 mode and going around corners. s-crews don't have a full time transfer case like some suvs and therefore they shouldn't be put into 4wd unless extra traction is needed...

 

Since the 4X4 system in the Screw is designed to be used only in slippery/low traction conditions, I would think these conditions would be the limiting factor for your speed.

I can't think of any low traction condition where speed would be an issue when using 4WD.

I know the owner's manual says not to engage 4X4 High range above 50 MPH while moving. This is probably a good indicator of the maximum speed you would ever use 4X4 high range.

You need to be stopped to engage the low range. Given the gearing of this range you will not be able to go very fast as you will feel the engine reaching a high level of RPMs.

I think if you are hitting 50 MPH in High or really revving the engine in Low (assuming you are not spinning the wheels) then it is probably safe to say you don't need the additional traction of 4 WD or you are going too fast for the conditions.

 

The problem is a result of the difference in travel between the left front and right front wheels and the difference in travel of the left rear and right rear wheel... each are on a different radius turn every time you turn your truck. With LS rear end, that will cause binding.. very damaging to the drivetrain.. do it enough and something is gonna give...

If you check the pavement after you have made the turn, you will see the rubber scrubbed off the tires from the binding.