Will Baty

Hi guys,

I am new here and I am in need of help. I have a '99 GMC w/ 67,000 miles on it and the front drive shaft will not dis-engage. Has anyone had this problem or heard of it, if so how do I fix it? I have the Magna Charger Radix system, 265/75/16 tires, no lift pretty much stock in appearance. My wife was driving it in Auto when this happened. Any clues?

Thanks,
Will

Will Baty

Any Ideas this thing is driving me crazy. When I back out or pull into a parking space it feels like it is in 4x4 but the front wheel have no power to them?

Thanks,
Will

whippled HD

there is a servo on the front diff unplug servo start it up drive it shut it off plug servo back in and tell wife not to run in auto

Will Baty

Thank you Whippled HD, I will try that tonight.

whippled HD

did it work?

Will Baty

Didn't work, does your front drive shaft disengage in 2x4? I never paid any attention to mine until I started having these problems. Mine does not spin freely in 2x4 it acts like it is in 4x4.

Thanks again,
Will

PSM

iTrader: (3)

To my knowledge the front drive shafts are always spining on those models. We have a 97 3500 and the shafts always spin....

tkaiser36

try driving in reverse for a 1/4 mile ive had same problem tech told me to try it and it worked ????? dont ask me let me know if it works for you

Will Baty

Well...that didn't work either. I dont know what this thing is doing, when I make a sharp turn it feels like it is in 4x4 (front-end pushes). When I am driving down the high way I can hear and feel a growl/vibration around 70mph. I dont know for sure if the front drive shaft should be dis-engaged or not when I am in 2x4, I am going to try I find another truck to find out. Any more ideas?

Thank you,
Will

whippled HD

are you still running in auto 4 wheel if so the servo i was talking about stays engaged and your front end is locked just like if you had your hubs loked in on a old straight axle.