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4hi Binds

yank8200

By yank8200
in Ask A GM Technician

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yank8200 New Member

yank8200

Posted
Posted

When I am driving in 4HI and due a full turn at slow speeds the front end fights the back end causing the truck to lock up. It is a NBS 07 and I tried the same test last year and did not have this issue now I do. Is this normal for front tires to fight the back tires? I don't have a locking diff.

2000DV4.8 Senior Enthusiast

2000DV4.8

Posted
Posted

Is this on dry pavement?

 

If so, it's completely normal. When turning, the front and rear wheels need to rotate at different speeds, and when locked in 4wd, the transfer case doesn't allow them to rotate at different speeds, hence the locking. Only use 4wd in situations that would allow the wheels to slip (on wet/snowy roads, gravel, dirt, etc).

asilverblazer Senior Enthusiast

asilverblazer

Posted
Posted

Yes, its normal, interesting you did not notice it last year. Only explanation I have is eithe the hubs did not engage, the front differential did not engage or the transfer case did not engage. Or, the ground was slippery nough so as not to cause the binding. As mentioned above using the 4 wheel drive system on dry pavement lowers fuel economy and is not condusive to the good health and longevity of the 4 wheel drive system.

2000DV4.8 Senior Enthusiast

2000DV4.8

Posted
Posted
Yes, its normal, interesting you did not notice it last year. Only explanation I have is eithe the hubs did not engage, the front differential did not engage or the transfer case did not engage. Or, the ground was slippery nough so as not to cause the binding. As mentioned above using the 4 wheel drive system on dry pavement lowers fuel economy and is not condusive to the good health and longevity of the 4 wheel drive system.

 

The hubs are never disengaged, the CV axle gets bolted right into the splines of the hub. It's the front diff, and T-case that do the engaging/disengaging. (IE the CV axles are always spinning when the truck is in motion).

asilverblazer Senior Enthusiast

asilverblazer

Posted
Posted

Not unless the traction is really poor to warrant the need of additional traction. Otherwise you're wasting gas. The owners manual has some good suggestions for the use of 4 wheel drive.

 

The hubs are never disengaged, the CV axle gets bolted right into the splines of the hub. It's the front diff, and T-case that do the engaging/disengaging. (IE the CV axles are always spinning when the truck is in motion).

 

Yes, yes, my bad. Too much thinking out loud.

2000DV4.8 Senior Enthusiast

2000DV4.8

Posted
Posted

Unless you are in a low-traction situation (snow, ice, off-road, etc.) there is no need for 4wd. Using 4wd on dry pavement will only decrease fuel economy, and increase wear on the front drive train and front tires.

 

Yes, yes, my bad. Too much thinking out loud.

 

It's all good. :dunno:

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