So yesterday on a trial i put the truck in 4H and noticed that while driving forward the made a clicking noise in the front. I couldnt tell it it was just the driver side or both but i soon realized that the 4WD was not working. The faster i tried to go (which was under 25mph) the faster the clicking was. I tried putting it in reverse and going back a little and back forward. I also tried using 4L and also went back and forth. There are no obvious signs from the outside that anything is wrong and it still works just fine in normal 2WD. I am quite mechanically inclined but i dont know too much about 4wd components so any help that anyone has to offer would be very much appreciated.
Aaron26
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1,901 Posts
My guess is one of the auto hubs isn't working. I'll assume you have an open diff in the front (no locker) so if one of the auto hubs isn't engaging all the power will go to that side because it has the least resistance since the CV axle isn't connected to the wheel. Like if you have one tire on ice and one on pavement, the one on ice will spin.
Warn and Mile Marker both make manual hubs. The stock auto hubs are pricey, definitely more expensive than the Mile Markers and probably the Warn ones too. 4x4parts.com carries them both and the swap is pretty easy. I think I have a link to a how to if you end up going that route.
Warn and Mile Marker both make manual hubs. The stock auto hubs are pricey, definitely more expensive than the Mile Markers and probably the Warn ones too. 4x4parts.com carries them both and the swap is pretty easy. I think I have a link to a how to if you end up going that route.
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1,901 Posts
The auto hubs wont disengage while the truck is in 4wd no matter which direction you travel. That only happens once the truck is fully out of 4wd.
Also, to my understanding (I may be wrong), if you engage 4wd and travel in reverse initially (in other words the hubs lock when moving in reverse) you must travel forward after 4wd is disengaged to unlock them. The hubs unlock when you move in the opposite direction of which they became locked.
To test it, it would be best to put the truck on a lift because all 4 tires would need to be off the ground. Put it in 4 wheel and in drive, if you have a CV shaft spinning and the respective front tire isn't then chances are it's the hub. Just a thought; I don't know how reliable this would be though. Things may act differently since there isn't the resistance of the tires being on the ground.
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