4wd on hwy

[85lolo]

wife drove 15 miles tonight with 4wd on in 04 silverado, anyone think it did damage? didnt notice any when checking

[MT-2500]

Originally Posted by 85lolo

wife drove 15 miles tonight with 4wd on in 04 silverado, anyone think it did damage? didnt notice any when checking

What transfer case and what 4W mode was used?
Some 4W on dry road puts a strain on them.
And some have a auto 4W mode.
But good news is the ones that it hurts it usually takes more miles than 10-20 miles for it to hurt it.
Matched tires or non matched tires would also plays a roll in hurting it.
And remember most newer transfer cases need the fluid serviced with the gm transfer case fluid.
What is the service history or mileage on yours?
MT

[85lolo]

truck has 19000 miles on it, it was in 4 hi (not auto 4wd) matched tires
thae damn thing is so quiet you cant hear that its on or even feel it in the steering wheel
how often does the transfer case need serviced?
thanx

[MT-2500]

No more miles than that and no binding up or noise I do not think it would have hurt anything.
I am not real sure on the service mileage.
The 246 uses transmission type clutches for auto mode.
They take the special GM transfer case fluid.
I would do it at least ever 50K or if GM calls for doing it in less mileage follow there maintenance plan.
Check the owners manual or your local dealer.
MT